diff --git a/src/material-experimental/column-resize/_column-resize-theme.scss b/src/material-experimental/column-resize/_column-resize-theme.scss
index a135eef41abe..0eb01e0522b9 100644
--- a/src/material-experimental/column-resize/_column-resize-theme.scss
+++ b/src/material-experimental/column-resize/_column-resize-theme.scss
@@ -141,15 +141,13 @@
 @mixin density($theme) {}
 
 @mixin theme($theme) {
-  @include mat.private-check-duplicate-theme-styles($theme, 'mat-column-resize') {
-    @if mat.theme-has($theme, color) {
-      @include color($theme);
-    }
-    @if mat.theme-has($theme, density) {
-      @include density($theme);
-    }
-    @if mat.theme-has($theme, typography) {
-      @include typography($theme);
-    }
+  @if mat.theme-has($theme, color) {
+    @include color($theme);
+  }
+  @if mat.theme-has($theme, density) {
+    @include density($theme);
+  }
+  @if mat.theme-has($theme, typography) {
+    @include typography($theme);
   }
 }
diff --git a/src/material-experimental/popover-edit/_popover-edit-theme.scss b/src/material-experimental/popover-edit/_popover-edit-theme.scss
index cc981d875f8f..214c81d7e7a3 100644
--- a/src/material-experimental/popover-edit/_popover-edit-theme.scss
+++ b/src/material-experimental/popover-edit/_popover-edit-theme.scss
@@ -154,15 +154,13 @@
 @mixin density($theme) {}
 
 @mixin theme($theme) {
-  @include mat.private-check-duplicate-theme-styles($theme, 'mat-popover-edit') {
-    @if mat.theme-has($theme, color) {
-      @include color($theme);
-    }
-    @if mat.theme-has($theme, density) {
-      @include density($theme);
-    }
-    @if mat.theme-has($theme, typography) {
-      @include typography($theme);
-    }
+  @if mat.theme-has($theme, color) {
+    @include color($theme);
+  }
+  @if mat.theme-has($theme, density) {
+    @include density($theme);
+  }
+  @if mat.theme-has($theme, typography) {
+    @include typography($theme);
   }
 }
diff --git a/src/material-experimental/selection/_selection.scss b/src/material-experimental/selection/_selection.scss
index 05457c06bcd2..379092562f25 100644
--- a/src/material-experimental/selection/_selection.scss
+++ b/src/material-experimental/selection/_selection.scss
@@ -1,7 +1,4 @@
-@use '@angular/material' as mat;
-
 @mixin theme($theme) {
-  @include mat.private-check-duplicate-theme-styles($theme, 'mat-selection');
 }
 
 @mixin typography($theme) {}
diff --git a/src/material/_index.scss b/src/material/_index.scss
index ad196cd60f1b..93e89c94af7d 100644
--- a/src/material/_index.scss
+++ b/src/material/_index.scss
@@ -23,8 +23,7 @@
 
 // Private/Internal
 @forward './core/density/private/all-density' show all-component-densities;
-@forward './core/theming/theming' show private-check-duplicate-theme-styles,
-  private-legacy-get-theme, private-is-theme-object;
+@forward './core/theming/theming' show private-legacy-get-theme, private-is-theme-object;
 @forward './core/style/private' show private-theme-elevation;
 @forward './core/style/vendor-prefixes' as private-* show private-user-select;
 @forward './core/style/variables' as private-* show $private-swift-ease-in-duration,
diff --git a/src/material/autocomplete/_autocomplete-theme.scss b/src/material/autocomplete/_autocomplete-theme.scss
index 00f0c665b0b5..21c46b92c6c6 100644
--- a/src/material/autocomplete/_autocomplete-theme.scss
+++ b/src/material/autocomplete/_autocomplete-theme.scss
@@ -1,5 +1,4 @@
 @use 'sass:map';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use '../core/tokens/token-utils';
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-autocomplete') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/badge/_badge-theme.scss b/src/material/badge/_badge-theme.scss
index 160c54ce6a7e..d3df753f607f 100644
--- a/src/material/badge/_badge-theme.scss
+++ b/src/material/badge/_badge-theme.scss
@@ -1,5 +1,4 @@
 @use '../core/theming/inspection';
-@use '../core/theming/theming';
 @use '../core/tokens/token-utils';
 @use '../core/typography/typography';
 @use './m2-badge';
@@ -87,23 +86,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-badge') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/bottom-sheet/_bottom-sheet-theme.scss b/src/material/bottom-sheet/_bottom-sheet-theme.scss
index 36771bb33e5f..39e8ec2e31a2 100644
--- a/src/material/bottom-sheet/_bottom-sheet-theme.scss
+++ b/src/material/bottom-sheet/_bottom-sheet-theme.scss
@@ -1,6 +1,5 @@
 @use 'sass:map';
 @use '../core/typography/typography';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/tokens/token-utils';
 @use './m2-bottom-sheet';
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-bottom-sheet') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/button-toggle/_button-toggle-theme.scss b/src/material/button-toggle/_button-toggle-theme.scss
index 3fc10f3a803e..d41e22c742a8 100644
--- a/src/material/button-toggle/_button-toggle-theme.scss
+++ b/src/material/button-toggle/_button-toggle-theme.scss
@@ -1,5 +1,4 @@
 @use '../core/theming/inspection';
-@use '../core/theming/theming';
 @use '../core/tokens/token-utils';
 @use '../core/typography/typography';
 @use './m2-button-toggle';
@@ -74,23 +73,21 @@
 /// @param {String} $color-variant: The color variant to use for the button toggle: primary,
 ///   secondary, tertiary, or error (If not specified, default secondary color will be used).
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-button-toggle') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/button/_button-theme.scss b/src/material/button/_button-theme.scss
index a3a748822b0e..d57977f1b7c7 100644
--- a/src/material/button/_button-theme.scss
+++ b/src/material/button/_button-theme.scss
@@ -1,5 +1,4 @@
 @use '../core/theming/inspection';
-@use '../core/theming/theming';
 @use '../core/tokens/token-utils';
 @use '../core/typography/typography';
 @use './m2-button';
@@ -94,23 +93,21 @@
 /// @param {String} $color-variant: The color variant to use for the button: primary, secondary,
 //         tertiary, or error (If not specified, default primary color will be used).
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-button') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/button/_fab-theme.scss b/src/material/button/_fab-theme.scss
index 1207e539751f..71f6504194a3 100644
--- a/src/material/button/_fab-theme.scss
+++ b/src/material/button/_fab-theme.scss
@@ -1,4 +1,3 @@
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use './m2-fab';
 @use './m3-fab';
@@ -92,23 +91,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant: The color variant to use for the fab
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-fab') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/button/_icon-button-theme.scss b/src/material/button/_icon-button-theme.scss
index 4803070d0b18..78dc1dffe406 100644
--- a/src/material/button/_icon-button-theme.scss
+++ b/src/material/button/_icon-button-theme.scss
@@ -3,7 +3,6 @@
 @use './m2-icon-button';
 @use './m3-icon-button';
 @use '../core/tokens/token-utils';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 
 @mixin base($theme) {
@@ -125,7 +124,6 @@
 /// @param {String} $color-variant: The color variant to use for the button: primary,
 //         secondary, tertiary, or error.
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-icon-button') {
     @if inspection.get-theme-version($theme) == 1 {
       @include base($theme);
       @include color($theme, $color-variant);
@@ -141,7 +139,6 @@
       }
       @if inspection.theme-has($theme, typography) {
         @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/card/_card-theme.scss b/src/material/card/_card-theme.scss
index 1c2d0d4a29fa..3213b5eeb7bc 100644
--- a/src/material/card/_card-theme.scss
+++ b/src/material/card/_card-theme.scss
@@ -1,5 +1,4 @@
 @use 'sass:map';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use '../core/tokens/token-utils';
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-card') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/checkbox/_checkbox-theme.scss b/src/material/checkbox/_checkbox-theme.scss
index 8c19a16fb3c6..c7b708ddb819 100644
--- a/src/material/checkbox/_checkbox-theme.scss
+++ b/src/material/checkbox/_checkbox-theme.scss
@@ -1,4 +1,3 @@
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/tokens/token-utils';
 @use '../core/typography/typography';
@@ -86,23 +85,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-checkbox') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/chips/_chips-theme.scss b/src/material/chips/_chips-theme.scss
index b5e9ddcb8562..ea4242bc82a9 100644
--- a/src/material/chips/_chips-theme.scss
+++ b/src/material/chips/_chips-theme.scss
@@ -2,7 +2,6 @@
 @use './m2-chip';
 @use './m3-chip';
 @use '../core/tokens/token-utils';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use 'sass:map';
@@ -96,23 +95,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-chips') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/core/_core-theme.scss b/src/material/core/_core-theme.scss
index 51943133d526..82915a4d4410 100644
--- a/src/material/core/_core-theme.scss
+++ b/src/material/core/_core-theme.scss
@@ -1,4 +1,3 @@
-@use './theming/theming';
 @use './theming/inspection';
 @use './ripple/ripple-theme';
 @use './option/option-theme';
@@ -106,26 +105,21 @@
 
 // Mixin that renders all of the core styles that depend on the theme.
 @mixin theme($theme) {
-  // Wrap the sub-theme includes in the duplicate theme styles mixin. This ensures that
-  // there won't be multiple warnings. e.g. if `mat-core-theme` reports a warning, then
-  // the imported themes (such as `mat-ripple-theme`) should not report again.
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-core') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/core/focus-indicators/_private.scss b/src/material/core/focus-indicators/_private.scss
index 3370f75d348f..82732ebbc876 100644
--- a/src/material/core/focus-indicators/_private.scss
+++ b/src/material/core/focus-indicators/_private.scss
@@ -2,7 +2,6 @@
 @use 'sass:meta';
 @use '@angular/cdk';
 @use '../style/layout-common';
-@use '../theming/theming';
 @use '../theming/inspection';
 
 // Private sass variables that will be used as reference throughout component stylesheets.
@@ -104,10 +103,8 @@ $default-border-radius: 4px;
     @include _customize-focus-indicators((border-color: $theme-or-color));
   }
   @else {
-    @include theming.private-check-duplicate-theme-styles($theme-or-color, 'mat-focus-indicators') {
-      @if inspection.theme-has($theme-or-color, color) {
-        @include strong-focus-indicators-color($theme-or-color);
-      }
+    @if inspection.theme-has($theme-or-color, color) {
+      @include strong-focus-indicators-color($theme-or-color);
     }
   }
 }
diff --git a/src/material/core/option/_optgroup-theme.scss b/src/material/core/option/_optgroup-theme.scss
index f2c007440824..7e73385c1740 100644
--- a/src/material/core/option/_optgroup-theme.scss
+++ b/src/material/core/option/_optgroup-theme.scss
@@ -2,7 +2,6 @@
 @use './m2-optgroup';
 @use './m3-optgroup';
 @use '../tokens/token-utils';
-@use '../theming/theming';
 @use '../theming/inspection';
 @use '../typography/typography';
 
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-optgroup') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/core/option/_option-theme.scss b/src/material/core/option/_option-theme.scss
index 6185d19ee89c..252e3e5cd080 100644
--- a/src/material/core/option/_option-theme.scss
+++ b/src/material/core/option/_option-theme.scss
@@ -1,7 +1,6 @@
 @use './m2-option';
 @use './m3-option';
 @use '../tokens/token-utils';
-@use '../theming/theming';
 @use '../theming/inspection';
 @use '../typography/typography';
 @use 'sass:map';
@@ -84,23 +83,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-option') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/core/ripple/_ripple-theme.scss b/src/material/core/ripple/_ripple-theme.scss
index 5564970a8c53..a8f97700f71c 100644
--- a/src/material/core/ripple/_ripple-theme.scss
+++ b/src/material/core/ripple/_ripple-theme.scss
@@ -2,7 +2,6 @@
 @use './m2-ripple';
 @use './m3-ripple';
 @use '../tokens/token-utils';
-@use '../theming/theming';
 @use '../theming/inspection';
 
 @mixin base($theme) {
@@ -56,23 +55,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-ripple') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/core/selection/pseudo-checkbox/_pseudo-checkbox-theme.scss b/src/material/core/selection/pseudo-checkbox/_pseudo-checkbox-theme.scss
index 6e7e7e633419..b8ff362f4007 100644
--- a/src/material/core/selection/pseudo-checkbox/_pseudo-checkbox-theme.scss
+++ b/src/material/core/selection/pseudo-checkbox/_pseudo-checkbox-theme.scss
@@ -1,4 +1,3 @@
-@use '../../theming/theming';
 @use '../../theming/inspection';
 @use '../../tokens/token-utils';
 @use './m2-pseudo-checkbox';
@@ -91,23 +90,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-pseudo-checkbox') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/core/theming/_all-theme.scss b/src/material/core/theming/_all-theme.scss
index e3536aaf087a..3f101ef80f41 100644
--- a/src/material/core/theming/_all-theme.scss
+++ b/src/material/core/theming/_all-theme.scss
@@ -37,51 +37,47 @@
 @use '../../snack-bar/snack-bar-theme';
 @use '../../form-field/form-field-theme';
 @use '../../timepicker/timepicker-theme';
-@use './theming';
 
 // Create a theme.
 @mixin all-component-themes($theme) {
-  $dedupe-key: 'angular-material-theme';
-  @include theming.private-check-duplicate-theme-styles($theme, $dedupe-key) {
-    @include core-theme.theme($theme);
-    @include card-theme.theme($theme);
-    @include progress-bar-theme.theme($theme);
-    @include tooltip-theme.theme($theme);
-    @include form-field-theme.theme($theme);
-    @include input-theme.theme($theme);
-    @include select-theme.theme($theme);
-    @include autocomplete-theme.theme($theme);
-    @include dialog-theme.theme($theme);
-    @include chips-theme.theme($theme);
-    @include slide-toggle-theme.theme($theme);
-    @include radio-theme.theme($theme);
-    @include slider-theme.theme($theme);
-    @include menu-theme.theme($theme);
-    @include list-theme.theme($theme);
-    @include paginator-theme.theme($theme);
-    @include tabs-theme.theme($theme);
-    @include checkbox-theme.theme($theme);
-    @include button-theme.theme($theme);
-    @include icon-button-theme.theme($theme);
-    @include fab-theme.theme($theme);
-    @include snack-bar-theme.theme($theme);
-    @include table-theme.theme($theme);
-    @include progress-spinner-theme.theme($theme);
-    @include badge-theme.theme($theme);
-    @include bottom-sheet-theme.theme($theme);
-    @include button-toggle-theme.theme($theme);
-    @include datepicker-theme.theme($theme);
-    @include divider-theme.theme($theme);
-    @include expansion-theme.theme($theme);
-    @include grid-list-theme.theme($theme);
-    @include icon-theme.theme($theme);
-    @include sidenav-theme.theme($theme);
-    @include stepper-theme.theme($theme);
-    @include sort-theme.theme($theme);
-    @include toolbar-theme.theme($theme);
-    @include tree-theme.theme($theme);
-    @include timepicker-theme.theme($theme);
-  }
+  @include core-theme.theme($theme);
+  @include card-theme.theme($theme);
+  @include progress-bar-theme.theme($theme);
+  @include tooltip-theme.theme($theme);
+  @include form-field-theme.theme($theme);
+  @include input-theme.theme($theme);
+  @include select-theme.theme($theme);
+  @include autocomplete-theme.theme($theme);
+  @include dialog-theme.theme($theme);
+  @include chips-theme.theme($theme);
+  @include slide-toggle-theme.theme($theme);
+  @include radio-theme.theme($theme);
+  @include slider-theme.theme($theme);
+  @include menu-theme.theme($theme);
+  @include list-theme.theme($theme);
+  @include paginator-theme.theme($theme);
+  @include tabs-theme.theme($theme);
+  @include checkbox-theme.theme($theme);
+  @include button-theme.theme($theme);
+  @include icon-button-theme.theme($theme);
+  @include fab-theme.theme($theme);
+  @include snack-bar-theme.theme($theme);
+  @include table-theme.theme($theme);
+  @include progress-spinner-theme.theme($theme);
+  @include badge-theme.theme($theme);
+  @include bottom-sheet-theme.theme($theme);
+  @include button-toggle-theme.theme($theme);
+  @include datepicker-theme.theme($theme);
+  @include divider-theme.theme($theme);
+  @include expansion-theme.theme($theme);
+  @include grid-list-theme.theme($theme);
+  @include icon-theme.theme($theme);
+  @include sidenav-theme.theme($theme);
+  @include stepper-theme.theme($theme);
+  @include sort-theme.theme($theme);
+  @include toolbar-theme.theme($theme);
+  @include tree-theme.theme($theme);
+  @include timepicker-theme.theme($theme);
 }
 
 @mixin all-component-bases($theme) {
diff --git a/src/material/core/theming/_theming.scss b/src/material/core/theming/_theming.scss
index e3ddff8a4d20..98a1f9cc217b 100644
--- a/src/material/core/theming/_theming.scss
+++ b/src/material/core/theming/_theming.scss
@@ -4,19 +4,16 @@
 @use 'sass:meta';
 @use 'sass:color';
 
+// Deprecated flag that is no longer used to control duplication warnings.
+// Remove in v22
+$theme-ignore-duplication-warnings: false;
+
 // Whether to enable compatibility with legacy methods for accessing theme information.
 $theme-legacy-inspection-api-compatibility: true !default;
 
-// Whether duplication warnings should be disabled. Warnings enabled by default.
-$theme-ignore-duplication-warnings: false !default;
-
 // Whether density should be generated by default.
 $_generate-default-density: true !default;
 
-// Warning that will be printed if duplicated styles are generated by a theme.
-$_duplicate-warning: 'Read more about how style duplication can be avoided in a dedicated ' +
-  'guide. https://v18.material.angular.dev/guide/duplicate-theming-styles';
-
 // Warning that will be printed if the legacy theming API is used.
 $private-legacy-theme-warning: 'Angular Material themes should be created from a map containing ' +
   'the keys "color", "typography", and "density". The color value should be a map containing the ' +
@@ -40,46 +37,6 @@ $_emitted-base: () !default;
 
 $private-internal-name: _mat-theming-internals-do-not-access;
 
-// Checks if configurations that have been declared in the given theme have been generated
-// before. If so, warnings will be reported. This should notify developers in case duplicate
-// styles are accidentally generated due to wrong usage of the all-theme mixins.
-//
-// Additionally, this mixin controls the default value for the density configuration. By
-// default, density styles are generated at scale zero. If the same density styles would be
-// generated a second time though, the default value will change to avoid duplicate styles.
-//
-// The mixin keeps track of all configurations in a list that is scoped to the specified
-// id. This is necessary because a given theme can be passed to multiple disjoint theme mixins
-// (e.g. `all-component-themes` and `all-legacy-component-themes`) without causing any
-// style duplication.
-@mixin private-check-duplicate-theme-styles($theme-or-color-config, $id) {
-  // TODO(mmalerba): use get-theme-version for this check when its moved out of experimental.
-  @if map.get($theme-or-color-config, $private-internal-name, theme-version) == 1 {
-    @include _check-duplicate-theme-styles-v1($theme-or-color-config, $id) {
-      // Optionally, consumers of this mixin can wrap contents inside so that nested
-      // duplicate style checks do not report another warning. e.g. if developers include
-      // the `all-component-themes` mixin twice, only the top-level duplicate styles check
-      // should report a warning. Not all individual components should report a warning too.
-      $orig-mat-theme-ignore-duplication-warnings: $theme-ignore-duplication-warnings;
-      $theme-ignore-duplication-warnings: true !global;
-      @content;
-      $theme-ignore-duplication-warnings: $orig-mat-theme-ignore-duplication-warnings !global;
-    }
-  }
-  @else {
-    @include _check-duplicate-theme-styles-v0($theme-or-color-config, $id) {
-      // Optionally, consumers of this mixin can wrap contents inside so that nested
-      // duplicate style checks do not report another warning. e.g. if developers include
-      // the `all-component-themes` mixin twice, only the top-level duplicate styles check
-      // should report a warning. Not all individual components should report a warning too.
-      $orig-mat-theme-ignore-duplication-warnings: $theme-ignore-duplication-warnings;
-      $theme-ignore-duplication-warnings: true !global;
-      @content;
-      $theme-ignore-duplication-warnings: $orig-mat-theme-ignore-duplication-warnings !global;
-    }
-  }
-}
-
 /// Strip out any settings map entries that have empty values (null or ()).
 @function _strip-empty-settings($settings) {
   $result: ();
@@ -91,131 +48,6 @@ $private-internal-name: _mat-theming-internals-do-not-access;
   @return if($result == (), null, $result);
 }
 
-// Checks for duplicate styles in a `theme-version: 1` style theme.
-@mixin _check-duplicate-theme-styles-v1($theme-or-color-config, $id) {
-  $color-settings: _strip-empty-settings((
-    theme-type: map.get($theme-or-color-config, $private-internal-name, theme-type),
-    color-tokens: map.get($theme-or-color-config, $private-internal-name, color-tokens),
-  ));
-  $typography-settings: _strip-empty-settings((
-    typography-tokens:
-      map.get($theme-or-color-config, $private-internal-name, typography-tokens),
-  ));
-  $density-settings: _strip-empty-settings((
-    density-scale:
-      map.get($theme-or-color-config, $private-internal-name, density-scale),
-    density-tokens:
-      map.get($theme-or-color-config, $private-internal-name, density-tokens),
-  ));
-  $base-settings: _strip-empty-settings((
-    base-tokens: map.get($theme-or-color-config, $private-internal-name, base-tokens),
-  ));
-  $previous-color-settings: map.get($_emitted-color, $id) or ();
-  $previous-typography-settings: map.get($_emitted-typography, $id) or ();
-  $previous-density-settings: map.get($_emitted-density, $id) or ();
-  $previous-base-settings: map.get($_emitted-base, $id) or ();
-
-  // Check if the color configuration has been generated before.
-  @if $color-settings != null {
-    @if list.index($previous-color-settings, $color-settings) != null and
-        not $theme-ignore-duplication-warnings {
-      @warn 'The same color styles are generated multiple times. ' + $_duplicate-warning;
-    }
-    $previous-color-settings: list.append($previous-color-settings, $color-settings);
-  }
-
-  // Check if the typography configuration has been generated before.
-  @if $typography-settings != null {
-    @if list.index($previous-typography-settings, $typography-settings) != null and
-        not $theme-ignore-duplication-warnings {
-      @warn 'The same typography styles are generated multiple times. ' + $_duplicate-warning;
-    }
-    $previous-typography-settings: list.append($previous-typography-settings, $typography-settings);
-  }
-
-  // Check if the density configuration has been generated before.
-  @if $density-settings != null {
-    @if list.index($previous-density-settings, $density-settings) != null and
-        not $theme-ignore-duplication-warnings {
-      @warn 'The same density styles are generated multiple times. ' + $_duplicate-warning;
-    }
-    $previous-density-settings: list.append($previous-density-settings, $density-settings);
-  }
-
-  // Check if the base configuration has been generated before.
-  @if $base-settings != null {
-    @if list.index($previous-base-settings, $base-settings) != null and
-        not $theme-ignore-duplication-warnings {
-      @warn 'The same base theme styles are generated multiple times. ' + $_duplicate-warning;
-    }
-    $previous-base-settings: list.append($previous-base-settings, $base-settings);
-  }
-
-  $_emitted-color: map.set($_emitted-color, $id, $previous-color-settings) !global;
-  $_emitted-density: map.set($_emitted-density, $id, $previous-density-settings) !global;
-  $_emitted-typography: map.set($_emitted-typography, $id, $previous-typography-settings) !global;
-  $_emitted-base: map.set($_emitted-base, $id, $previous-base-settings) !global;
-
-  @content;
-}
-
-// Checks for duplicate styles in a `theme-version: 0` style theme.
-@mixin _check-duplicate-theme-styles-v0($theme-or-color-config, $id) {
-  $theme: private-legacy-get-theme($theme-or-color-config);
-  $color-config: map.get($theme, $private-internal-name, m2-config, color) or
-    private-get-color-config($theme);
-  $density-config: map.get($theme, $private-internal-name, m2-config, density) or
-    private-get-density-config($theme);
-  $typography-config: map.get($theme, $private-internal-name, m2-config, typography) or
-    private-get-typography-config($theme);
-  // Lists of previous `color`, `density` and `typography` configurations.
-  $previous-color: map.get($_emitted-color, $id) or ();
-  $previous-typography: map.get($_emitted-typography, $id) or ();
-  $previous-density: map.get($_emitted-density, $id) or ();
-  // Whether duplicate legacy density styles would be generated.
-  $duplicate-legacy-density: false;
-
-  // Check if the color configuration has been generated before.
-  @if $color-config != null {
-    @if list.index($previous-color, $color-config) != null and
-        not $theme-ignore-duplication-warnings {
-      @warn 'The same color styles are generated multiple times. ' + $_duplicate-warning;
-    }
-    $previous-color: list.append($previous-color, $color-config);
-  }
-
-  // Check if the typography configuration has been generated before.
-  @if $typography-config != null {
-    @if list.index($previous-typography, $typography-config) != null and
-        not $theme-ignore-duplication-warnings {
-      @warn 'The same typography styles are generated multiple times. ' + $_duplicate-warning;
-    }
-    $previous-typography: list.append($previous-typography, $typography-config);
-  }
-
-  // Check if the density configuration has been generated before.
-  @if $density-config != null {
-    @if list.index($previous-density, $density-config) != null {
-      // Only report a warning if density styles would be duplicated for non-legacy theme
-      // definitions. For legacy themes, we have compatibility logic that avoids duplication
-      // of default density styles. We don't want to report a warning in those cases.
-      @if private-is-legacy-constructed-theme($theme) {
-        $duplicate-legacy-density: true;
-      }
-      @else if not $theme-ignore-duplication-warnings {
-        @warn 'The same density styles are generated multiple times. ' + $_duplicate-warning;
-      }
-    }
-    $previous-density: list.append($previous-density, $density-config);
-  }
-
-  $_emitted-color: map.merge($_emitted-color, ($id: $previous-color)) !global;
-  $_emitted-density: map.merge($_emitted-density, ($id: $previous-density)) !global;
-  $_emitted-typography: map.merge($_emitted-typography, ($id: $previous-typography)) !global;
-
-  @content;
-}
-
 // Checks whether the given value resolves to a theme object. Theme objects are always
 // of type `map` and can optionally only specify `color`, `density` or `typography`.
 @function private-is-theme-object($value) {
diff --git a/src/material/core/theming/tests/test-theming-api.scss b/src/material/core/theming/tests/test-theming-api.scss
index 566992f8ceac..963c79333e92 100644
--- a/src/material/core/theming/tests/test-theming-api.scss
+++ b/src/material/core/theming/tests/test-theming-api.scss
@@ -9,10 +9,6 @@
 @use '../theming';
 @use 'sass:map';
 
-// Disable theme style duplication warnings. This test intentionally generates
-// the same themes multiple times.
-theming.$theme-ignore-duplication-warnings: true;
-
 // A new way to configure themes has been introduced. This Sass file ensures that the theming
 // API is backwards compatible, so that the old pattern for configuring themes can be still
 // used. The Sass compilation of this file will fail if one of the tests/assertions fails.
diff --git a/src/material/core/theming/tests/test-theming-bundle.scss b/src/material/core/theming/tests/test-theming-bundle.scss
index 4763e52c9446..61f1191f7353 100644
--- a/src/material/core/theming/tests/test-theming-bundle.scss
+++ b/src/material/core/theming/tests/test-theming-bundle.scss
@@ -3,10 +3,6 @@
 // with the include paths being set to the `bazel-bin` directory.
 @use '../../../index' as mat;
 
-// Disable theme style duplication warnings. This test intentionally generates
-// the same themes multiple times.
-mat.$theme-ignore-duplication-warnings: true;
-
 // If one of these mixins or function is not available, the compilation will fail and the
 // test will be reported as failing.
 
diff --git a/src/material/core/theming/tests/theming-mixin-api.spec.ts b/src/material/core/theming/tests/theming-mixin-api.spec.ts
deleted file mode 100644
index 197587ccdbf8..000000000000
--- a/src/material/core/theming/tests/theming-mixin-api.spec.ts
+++ /dev/null
@@ -1,270 +0,0 @@
-import {parse, Root, Rule} from 'postcss';
-import {compileString} from 'sass';
-import {runfiles} from '@bazel/runfiles';
-import * as path from 'path';
-
-import {compareNodes} from '../../../../../tools/postcss/compare-nodes.js';
-import {createLocalAngularPackageImporter} from '../../../../../tools/sass/local-sass-importer.js';
-
-// Note: For Windows compatibility, we need to resolve the directory paths through runfiles
-// which are guaranteed to reside in the source tree.
-const testDir = path.join(runfiles.resolvePackageRelative('../_all-theme.scss'), '../tests');
-const packagesDir = path.join(runfiles.resolveWorkspaceRelative('src/cdk/_index.scss'), '../..');
-
-const localPackageSassImporter = createLocalAngularPackageImporter(packagesDir);
-
-describe('theming api', () => {
-  /** Map of known selectors for density styles and their corresponding AST rule. */
-  let knownDensitySelectors: Map<string, Rule>;
-
-  // Before all tests, we collect all nodes specific to density styles. We can then
-  // use this check how density styles are generated. i.e. if they are properly scoped to a
-  // given selector.
-  beforeAll(() => {
-    knownDensitySelectors = new Map();
-    parse(transpile(`@include mat.all-component-densities(0);`)).each(node => {
-      if (node.type === 'rule') {
-        node.selectors.forEach(s => knownDensitySelectors.set(s, node));
-      }
-    });
-  });
-
-  it('should warn if color styles are duplicated', () => {
-    spyOn(process.stderr, 'write');
-
-    transpile(`
-      $theme: mat.m2-define-light-theme((
-        color: (
-          primary: mat.m2-define-palette(mat.$m2-red-palette),
-          accent: mat.m2-define-palette(mat.$m2-red-palette),
-        )
-      ));
-
-      @include mat.all-component-themes($theme);
-
-      .dark-theme {
-        @include mat.all-component-themes($theme);
-      }
-    `);
-
-    expectWarning(/The same color styles are generated multiple times/);
-  });
-
-  it('should not warn if color styles and density are not duplicated', () => {
-    const parsed = parse(
-      transpile(`
-      $theme: mat.m2-define-light-theme((
-        color: (
-          primary: mat.m2-define-palette(mat.$m2-red-palette),
-          accent: mat.m2-define-palette(mat.$m2-red-palette),
-        )
-      ));
-      $theme2: mat.m2-define-light-theme((
-        color: (
-          primary: mat.m2-define-palette(mat.$m2-red-palette),
-          accent: mat.m2-define-palette(mat.$m2-blue-palette),
-        )
-      ));
-
-      @include mat.all-component-themes($theme);
-
-      .dark-theme {
-        @include mat.all-component-colors($theme2);
-      }
-    `),
-    );
-
-    expect(hasDensityStyles(parsed, null)).toBe('all');
-    expect(hasDensityStyles(parsed, '.dark-theme')).toBe('none');
-    expectNoWarning(/The same color styles are generated multiple times/);
-  });
-
-  it('should warn if default density styles are duplicated', () => {
-    spyOn(process.stderr, 'write');
-
-    const parsed = parse(
-      transpile(`
-      @include mat.all-component-themes((color: null));
-
-      .dark-theme {
-        @include mat.all-component-themes((color: null));
-      }
-    `),
-    );
-
-    expect(hasDensityStyles(parsed, null)).toBe('all');
-    // TODO(mmalerba): Re-enable - disabled because this test does not account
-    //  for the fact that:
-    //  ```scss
-    //  @include mat.button-theme($theme);
-    //  @include mat.checkbox-theme($theme);
-    //  ```
-    //  produces different results than:
-    //  ```scss
-    //  html {
-    //    @include mat.button-theme($theme);
-    //    @include mat.checkbox-theme($theme);
-    //  }
-    //  ```
-    // expect(hasDensityStyles(parsed, '.dark-theme')).toBe('all');
-    expectWarning(/The same density styles are generated multiple times/);
-  });
-
-  it('should warn if density styles are duplicated', () => {
-    spyOn(process.stderr, 'write');
-
-    transpile(`
-      @include mat.all-component-themes((density: -1));
-
-      .dark-theme {
-        @include mat.all-component-themes((density: -1));
-      }
-    `);
-
-    expectWarning(/The same density styles are generated multiple times/);
-  });
-
-  it('should not warn if density styles are not duplicated', () => {
-    spyOn(process.stderr, 'write');
-
-    transpile(`
-      @include mat.all-component-themes((density: -1));
-
-      .dark-theme {
-        @include mat.all-component-themes((density: -2));
-      }
-    `);
-
-    expect(process.stderr.write).toHaveBeenCalledTimes(0);
-  });
-
-  it('should warn if typography styles are duplicated', () => {
-    spyOn(process.stderr, 'write');
-
-    transpile(`
-      $theme: (typography: mat.m2-define-typography-config(), density: null);
-      @include mat.all-component-themes($theme);
-
-      .dark-theme {
-        @include mat.all-component-themes($theme);
-      }
-    `);
-
-    expectWarning(/The same typography styles are generated multiple times/);
-  });
-
-  it('should not warn if typography styles are not duplicated', () => {
-    spyOn(process.stderr, 'write');
-
-    transpile(`
-      @include mat.all-component-themes((
-        typography: mat.m2-define-typography-config(),
-        density: null,
-      ));
-
-      .dark-theme {
-        @include mat.all-component-themes((
-          typography: mat.m2-define-typography-config($font-family: "sans-serif"),
-          density: null,
-        ));
-      }
-    `);
-
-    expect(process.stderr.write).toHaveBeenCalledTimes(0);
-  });
-
-  /**
-   * Checks whether the given parsed stylesheet contains density styles scoped to
-   * a given selector. If the selector is `null`, then density is expected to be
-   * generated at top-level.
-   */
-  function hasDensityStyles(parsed: Root, baseSelector: string | null): 'all' | 'partial' | 'none' {
-    expect(parsed.nodes).withContext('Expected CSS to be not empty.').toBeDefined();
-    expect(knownDensitySelectors.size).not.toBe(0);
-    const missingDensitySelectors = new Set(knownDensitySelectors.keys());
-    const baseSelectorRegex = new RegExp(`^${baseSelector} `, 'g');
-
-    // Go through all rules in the stylesheet and check if they match with any
-    // of the density style selectors. If so, we remove it from the copied set
-    // of density selectors. If the set is empty at the end, we know that density
-    // styles have been generated as expected.
-    parsed.nodes!.forEach(node => {
-      if (node.type !== 'rule') {
-        return;
-      }
-      node.selectors.forEach(selector => {
-        if (baseSelector && selector === baseSelector) {
-          // Styles emitted directly to the baseSelector are emitted to html
-          // when there is no baseSelector.
-          selector = 'html';
-        } else {
-          // Only check selectors that match the specified base selector.
-          if (baseSelector && !baseSelectorRegex.test(selector)) {
-            return;
-          }
-        }
-        selector = selector.replace(baseSelectorRegex, '');
-        const matchingRule = knownDensitySelectors.get(selector);
-        if (matchingRule && compareNodes(node, matchingRule)) {
-          missingDensitySelectors.delete(selector);
-        }
-      });
-    });
-
-    // If there are no unmatched density selectors, then it's confirmed that
-    // all density styles have been generated (scoped to the given selector).
-    if (missingDensitySelectors.size === 0) {
-      return 'all';
-    }
-    // If no density selector has been matched at all, then no density
-    // styles have been generated.
-    if (missingDensitySelectors.size === knownDensitySelectors.size) {
-      return 'none';
-    }
-    console.error('MISSING!!! ', [...missingDensitySelectors].join(','));
-    return 'partial';
-  }
-
-  /** Transpiles given Sass content into CSS. */
-  function transpile(content: string) {
-    return compileString(
-      `
-        @use '../../../index' as mat;
-
-        ${content}
-      `,
-      {
-        loadPaths: [testDir],
-        importers: [localPackageSassImporter],
-      },
-    ).css.toString();
-  }
-
-  /** Expects the given warning to be reported in Sass. */
-  function expectWarning(message: RegExp) {
-    expect(getMatchingWarning(message))
-      .withContext('Expected warning to be printed.')
-      .toBeDefined();
-  }
-
-  /** Expects the given warning not to be reported in Sass. */
-  function expectNoWarning(message: RegExp) {
-    expect(getMatchingWarning(message))
-      .withContext('Expected no warning to be printed.')
-      .toBeUndefined();
-  }
-
-  /**
-   * Gets first instance of the given warning reported in Sass. Dart sass directly writes
-   * to the `process.stderr` stream, so we spy on the `stderr.write` method. We
-   * cannot expect a specific amount of writes as Sass calls `stderr.write` multiple
-   * times for a warning (e.g. spacing and stack trace)
-   */
-  function getMatchingWarning(message: RegExp) {
-    const writeSpy = process.stderr.write as jasmine.Spy;
-    return (writeSpy.calls?.all() ?? []).find(
-      (s: jasmine.CallInfo<typeof process.stderr.write>) =>
-        typeof s.args[0] === 'string' && message.test(s.args[0]),
-    );
-  }
-});
diff --git a/src/material/datepicker/_datepicker-theme.scss b/src/material/datepicker/_datepicker-theme.scss
index 281ed444c356..d2972be6bf59 100644
--- a/src/material/datepicker/_datepicker-theme.scss
+++ b/src/material/datepicker/_datepicker-theme.scss
@@ -2,7 +2,6 @@
 @use 'sass:map';
 @use './m2-datepicker';
 @use './m3-datepicker';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/tokens/token-utils';
 @use '../core/typography/typography';
@@ -113,23 +112,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-datepicker') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/dialog/_dialog-theme.scss b/src/material/dialog/_dialog-theme.scss
index 9d0157f76a23..9c6cbb9ed00a 100644
--- a/src/material/dialog/_dialog-theme.scss
+++ b/src/material/dialog/_dialog-theme.scss
@@ -2,7 +2,6 @@
 @use './m2-dialog';
 @use './m3-dialog';
 @use '../core/tokens/token-utils';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-dialog') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/divider/_divider-theme.scss b/src/material/divider/_divider-theme.scss
index 4090fbeca03e..8583c131428e 100644
--- a/src/material/divider/_divider-theme.scss
+++ b/src/material/divider/_divider-theme.scss
@@ -1,5 +1,4 @@
 @use 'sass:map';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/tokens/token-utils';
 @use './m2-divider';
@@ -56,23 +55,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-divider') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/expansion/_expansion-theme.scss b/src/material/expansion/_expansion-theme.scss
index c0b0f41b82d3..0a435e6142e7 100644
--- a/src/material/expansion/_expansion-theme.scss
+++ b/src/material/expansion/_expansion-theme.scss
@@ -1,5 +1,4 @@
 @use 'sass:map';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use '../core/tokens/token-utils';
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-expansion') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/form-field/_form-field-theme.scss b/src/material/form-field/_form-field-theme.scss
index 61a172eadf43..9a757e594f71 100644
--- a/src/material/form-field/_form-field-theme.scss
+++ b/src/material/form-field/_form-field-theme.scss
@@ -1,6 +1,5 @@
 @use './m2-form-field';
 @use './m3-form-field';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use '../core/tokens/token-utils';
@@ -77,23 +76,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-form-field') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/grid-list/_grid-list-theme.scss b/src/material/grid-list/_grid-list-theme.scss
index a2fe523cba92..930d84ba2aab 100644
--- a/src/material/grid-list/_grid-list-theme.scss
+++ b/src/material/grid-list/_grid-list-theme.scss
@@ -1,5 +1,4 @@
 @use 'sass:map';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use './m2-grid-list';
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-grid-list') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/icon/_icon-theme.scss b/src/material/icon/_icon-theme.scss
index 75f5621b3216..809f4f4fa4f6 100644
--- a/src/material/icon/_icon-theme.scss
+++ b/src/material/icon/_icon-theme.scss
@@ -1,5 +1,4 @@
 @use '../core/theming/inspection';
-@use '../core/theming/theming';
 @use '../core/tokens/token-utils';
 @use './m2-icon';
 @use './m3-icon';
@@ -92,23 +91,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-icon') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/input/_input-theme.scss b/src/material/input/_input-theme.scss
index 782939b3fca4..36b7be9470ac 100644
--- a/src/material/input/_input-theme.scss
+++ b/src/material/input/_input-theme.scss
@@ -1,4 +1,3 @@
-@use '../core/theming/theming';
 @use '../core/typography/typography';
 @use '../core/tokens/token-utils';
 
@@ -33,7 +32,5 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-input') {
-    // No-op
-  }
+  // No-op
 }
diff --git a/src/material/list/_list-theme.scss b/src/material/list/_list-theme.scss
index 400208bcdad9..d1b47f683c34 100644
--- a/src/material/list/_list-theme.scss
+++ b/src/material/list/_list-theme.scss
@@ -2,7 +2,6 @@
 
 @use '../checkbox/m2-checkbox';
 @use '../core/theming/inspection';
-@use '../core/theming/theming';
 @use '../core/tokens/token-utils';
 @use '../core/typography/typography';
 @use '../radio/m2-radio';
@@ -180,23 +179,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-list') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/menu/_menu-theme.scss b/src/material/menu/_menu-theme.scss
index 2c575909dd1f..6fa1d6eec0f5 100644
--- a/src/material/menu/_menu-theme.scss
+++ b/src/material/menu/_menu-theme.scss
@@ -2,7 +2,6 @@
 @use './m2-menu';
 @use './m3-menu';
 @use '../core/tokens/token-utils';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-menu') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/paginator/_paginator-theme.scss b/src/material/paginator/_paginator-theme.scss
index 2eb63c98810e..02789a5d4199 100644
--- a/src/material/paginator/_paginator-theme.scss
+++ b/src/material/paginator/_paginator-theme.scss
@@ -2,7 +2,6 @@
 @use './m2-paginator';
 @use './m3-paginator';
 @use '../core/typography/typography';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/tokens/token-utils';
 
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-paginator') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/progress-bar/_progress-bar-theme.scss b/src/material/progress-bar/_progress-bar-theme.scss
index a50b484580f8..58c76823e99d 100644
--- a/src/material/progress-bar/_progress-bar-theme.scss
+++ b/src/material/progress-bar/_progress-bar-theme.scss
@@ -1,4 +1,3 @@
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/tokens/token-utils';
 @use './m2-progress-bar';
@@ -74,23 +73,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-progress-bar') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/progress-spinner/_progress-spinner-theme.scss b/src/material/progress-spinner/_progress-spinner-theme.scss
index 2869aea10d62..d5486410e0e0 100644
--- a/src/material/progress-spinner/_progress-spinner-theme.scss
+++ b/src/material/progress-spinner/_progress-spinner-theme.scss
@@ -1,4 +1,3 @@
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/tokens/token-utils';
 @use './m2-progress-spinner';
@@ -76,23 +75,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-progress-spinner') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/radio/_radio-theme.scss b/src/material/radio/_radio-theme.scss
index 70fe849d2207..5e4eb887f201 100644
--- a/src/material/radio/_radio-theme.scss
+++ b/src/material/radio/_radio-theme.scss
@@ -1,4 +1,3 @@
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/tokens/token-utils';
 @use '../core/typography/typography';
@@ -83,23 +82,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-radio') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/select/_select-theme.scss b/src/material/select/_select-theme.scss
index ef9b5cd72a75..16347bd71103 100644
--- a/src/material/select/_select-theme.scss
+++ b/src/material/select/_select-theme.scss
@@ -1,5 +1,4 @@
 @use '../core/theming/inspection';
-@use '../core/theming/theming';
 @use '../core/tokens/token-utils';
 @use '../core/typography/typography';
 @use './m2-select';
@@ -80,23 +79,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-select') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/sidenav/_sidenav-theme.scss b/src/material/sidenav/_sidenav-theme.scss
index 2d54ba33e284..54589a006f02 100644
--- a/src/material/sidenav/_sidenav-theme.scss
+++ b/src/material/sidenav/_sidenav-theme.scss
@@ -1,6 +1,5 @@
 @use 'sass:map';
 @use '../core/theming/inspection';
-@use '../core/theming/theming';
 @use '../core/tokens/token-utils';
 @use './m2-sidenav';
 @use './m3-sidenav';
@@ -56,23 +55,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-sidenav') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/slide-toggle/_slide-toggle-theme.scss b/src/material/slide-toggle/_slide-toggle-theme.scss
index 8046e91e7399..42dba4270f8f 100644
--- a/src/material/slide-toggle/_slide-toggle-theme.scss
+++ b/src/material/slide-toggle/_slide-toggle-theme.scss
@@ -1,6 +1,5 @@
 @use 'sass:map';
 @use '../core/style/sass-utils';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/tokens/token-utils';
 @use '../core/typography/typography';
@@ -114,23 +113,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-slide-toggle') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/slider/_slider-theme.scss b/src/material/slider/_slider-theme.scss
index cf5d2bf1a174..6c36654cb78b 100644
--- a/src/material/slider/_slider-theme.scss
+++ b/src/material/slider/_slider-theme.scss
@@ -1,4 +1,3 @@
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use '../core/tokens/token-utils';
@@ -84,23 +83,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-slider') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/snack-bar/_snack-bar-theme.scss b/src/material/snack-bar/_snack-bar-theme.scss
index 9e70606ebfea..791d5f708d13 100644
--- a/src/material/snack-bar/_snack-bar-theme.scss
+++ b/src/material/snack-bar/_snack-bar-theme.scss
@@ -1,5 +1,4 @@
 @use 'sass:map';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use '../core/tokens/token-utils';
@@ -58,23 +57,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-snack-bar') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/sort/_sort-theme.scss b/src/material/sort/_sort-theme.scss
index b719755ff140..0e30441cd28c 100644
--- a/src/material/sort/_sort-theme.scss
+++ b/src/material/sort/_sort-theme.scss
@@ -2,7 +2,6 @@
 @use './m2-sort';
 @use './m3-sort';
 @use '../core/typography/typography';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/tokens/token-utils';
 
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-sort') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/stepper/_stepper-theme.scss b/src/material/stepper/_stepper-theme.scss
index f98a3bb66126..95c3f2c99536 100644
--- a/src/material/stepper/_stepper-theme.scss
+++ b/src/material/stepper/_stepper-theme.scss
@@ -1,4 +1,3 @@
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use '../core/tokens/token-utils';
@@ -80,26 +79,24 @@
 /// @param {Map} $theme The theme to generate color styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-stepper') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
+      @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/table/_table-theme.scss b/src/material/table/_table-theme.scss
index 269f0d2220a9..d807bba45996 100644
--- a/src/material/table/_table-theme.scss
+++ b/src/material/table/_table-theme.scss
@@ -1,7 +1,6 @@
 @use 'sass:map';
 @use './m2-table';
 @use './m3-table';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use '../core/tokens/token-utils';
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-table') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/tabs/_tabs-theme.scss b/src/material/tabs/_tabs-theme.scss
index d632feb0d847..c2301d360a2c 100644
--- a/src/material/tabs/_tabs-theme.scss
+++ b/src/material/tabs/_tabs-theme.scss
@@ -1,6 +1,5 @@
 @use './m2-tabs';
 @use './m3-tabs';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use '../core/tokens/token-utils';
@@ -112,23 +111,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component (M3 only)
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-tabs') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
-      @include color($theme, $color-variant);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme, $color-variant);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
+      @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/timepicker/_timepicker-theme.scss b/src/material/timepicker/_timepicker-theme.scss
index db7496bca64a..32b041b472ad 100644
--- a/src/material/timepicker/_timepicker-theme.scss
+++ b/src/material/timepicker/_timepicker-theme.scss
@@ -1,5 +1,4 @@
 @use 'sass:map';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use './m2-timepicker';
@@ -62,23 +61,21 @@
 /// @param {Map} $theme The theme to generate styles for.
 /// @param {String} $color-variant The color variant to use for the component
 @mixin theme($theme, $color-variant: null) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-timepicker') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/toolbar/_toolbar-theme.scss b/src/material/toolbar/_toolbar-theme.scss
index bdc9ec1d3dac..3ce01ac0b32d 100644
--- a/src/material/toolbar/_toolbar-theme.scss
+++ b/src/material/toolbar/_toolbar-theme.scss
@@ -1,6 +1,5 @@
 @use 'sass:map';
 @use '../core/theming/inspection';
-@use '../core/theming/theming';
 @use '../core/tokens/token-utils';
 @use '../core/typography/typography';
 @use './m2-toolbar';
@@ -95,23 +94,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-toolbar') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/tooltip/_tooltip-theme.scss b/src/material/tooltip/_tooltip-theme.scss
index 61406bef064a..9ebd3bf38370 100644
--- a/src/material/tooltip/_tooltip-theme.scss
+++ b/src/material/tooltip/_tooltip-theme.scss
@@ -1,4 +1,3 @@
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/tokens/token-utils';
 @use '../core/typography/typography';
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-tooltip') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }
diff --git a/src/material/tree/_tree-theme.scss b/src/material/tree/_tree-theme.scss
index 7fb2c370e67c..1985be922307 100644
--- a/src/material/tree/_tree-theme.scss
+++ b/src/material/tree/_tree-theme.scss
@@ -1,5 +1,4 @@
 @use 'sass:map';
-@use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/typography/typography';
 @use '../core/tokens/token-utils';
@@ -57,23 +56,21 @@
 }
 
 @mixin theme($theme) {
-  @include theming.private-check-duplicate-theme-styles($theme, 'mat-tree') {
-    @if inspection.get-theme-version($theme) == 1 {
-      @include base($theme);
+  @if inspection.get-theme-version($theme) == 1 {
+    @include base($theme);
+    @include color($theme);
+    @include density($theme);
+    @include typography($theme);
+  } @else {
+    @include base($theme);
+    @if inspection.theme-has($theme, color) {
       @include color($theme);
+    }
+    @if inspection.theme-has($theme, density) {
       @include density($theme);
+    }
+    @if inspection.theme-has($theme, typography) {
       @include typography($theme);
-    } @else {
-      @include base($theme);
-      @if inspection.theme-has($theme, color) {
-        @include color($theme);
-      }
-      @if inspection.theme-has($theme, density) {
-        @include density($theme);
-      }
-      @if inspection.theme-has($theme, typography) {
-        @include typography($theme);
-      }
     }
   }
 }