diff --git a/.github/workflows/lib-checks.yml b/.github/workflows/lib-checks.yml
index 372b7fa281..25a713e933 100644
--- a/.github/workflows/lib-checks.yml
+++ b/.github/workflows/lib-checks.yml
@@ -93,3 +93,21 @@ jobs:
         run: mkdir -p -v .mypy_cache
       - name: "Run mypy"
         run: uv run mypy --non-interactive discord/
+  slotscheck:
+    if: ${{ github.event_name != 'schedule' }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Checkout Repository"
+        uses: actions/checkout@v4
+      - name: "Setup Python"
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+      - name: "Install uv"
+        uses: astral-sh/setup-uv@v6
+        with:
+          enable-cache: true
+      - name: Sync dependencies
+        run: uv sync --no-python-downloads --group dev
+      - name: "Run slotscheck"
+        run: uv run slotscheck discord
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e43197fe9e..94fb43bc89 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -33,3 +33,11 @@ repos:
       - id: prettier
         args: [--prose-wrap=always, --print-width=88]
         exclude: \.(po|pot|yml|yaml)$
+  - repo: https://github.com/ariebovenberg/slotscheck
+    rev: v0.19.1
+    hooks:
+      - id: slotscheck
+        additional_dependencies:
+          - "typing-extensions>=4,<5"
+          - "colorlog~=6.9.0"
+          - "aiohttp>=3.6.0,<4.0"
\ No newline at end of file
diff --git a/discord/activity.py b/discord/activity.py
index 9cda6bc3f2..35e6f2c436 100644
--- a/discord/activity.py
+++ b/discord/activity.py
@@ -204,7 +204,6 @@ class Activity(BaseActivity):
     __slots__ = (
         "state",
         "details",
-        "_created_at",
         "timestamps",
         "assets",
         "party",
diff --git a/discord/asset.py b/discord/asset.py
index 3bc04faa7c..b61e907c7a 100644
--- a/discord/asset.py
+++ b/discord/asset.py
@@ -51,6 +51,8 @@ class AssetMixin:
     url: str
     _state: Any | None
 
+    __slots__: tuple[str, ...] = ("_state", "url")
+
     async def read(self) -> bytes:
         """|coro|
 
@@ -148,7 +150,6 @@ class Asset(AssetMixin):
     """
 
     __slots__: tuple[str, ...] = (
-        "_state",
         "_url",
         "_animated",
         "_key",
diff --git a/discord/components.py b/discord/components.py
index 0d9a927a66..3c040a1857 100644
--- a/discord/components.py
+++ b/discord/components.py
@@ -154,7 +154,6 @@ class InputText(Component):
     """
 
     __slots__: tuple[str, ...] = (
-        "type",
         "style",
         "custom_id",
         "label",
diff --git a/discord/emoji.py b/discord/emoji.py
index 5dd1eafd3d..154166306c 100644
--- a/discord/emoji.py
+++ b/discord/emoji.py
@@ -53,9 +53,7 @@ class BaseEmoji(_EmojiTag, AssetMixin):
         "require_colons",
         "animated",
         "managed",
-        "id",
         "name",
-        "_state",
         "user",
         "available",
     )
diff --git a/discord/partial_emoji.py b/discord/partial_emoji.py
index 9bf304bc75..decb3646f8 100644
--- a/discord/partial_emoji.py
+++ b/discord/partial_emoji.py
@@ -91,7 +91,7 @@ class PartialEmoji(_EmojiTag, AssetMixin):
         The ID of the custom emoji, if applicable.
     """
 
-    __slots__ = ("animated", "name", "id", "_state")
+    __slots__ = ("animated", "name", "id")
 
     _CUSTOM_EMOJI_RE = re.compile(r"<?(?P<animated>a)?:?(?P<name>\w+):(?P<id>[0-9]{13,20})>?")
 
diff --git a/discord/raw_models.py b/discord/raw_models.py
index e16a2f5018..ba44f92f37 100644
--- a/discord/raw_models.py
+++ b/discord/raw_models.py
@@ -85,6 +85,8 @@
 
 
 class _RawReprMixin:
+    __slots__ = ()
+
     def __repr__(self) -> str:
         value = " ".join(f"{attr}={getattr(self, attr)!r}" for attr in self.__slots__)
         return f"<{self.__class__.__name__} {value}>"
diff --git a/discord/sticker.py b/discord/sticker.py
index 66d8d95ef9..cb985f5e9e 100644
--- a/discord/sticker.py
+++ b/discord/sticker.py
@@ -200,7 +200,7 @@ class StickerItem(_StickerTag):
         The URL for the sticker's image.
     """
 
-    __slots__ = ("_state", "name", "id", "format", "url")
+    __slots__ = ("name", "id", "format")
 
     def __init__(self, *, state: ConnectionState, data: StickerItemPayload):
         self._state: ConnectionState = state
@@ -271,7 +271,7 @@ class Sticker(_StickerTag):
         The URL for the sticker's image.
     """
 
-    __slots__ = ("_state", "id", "name", "description", "format", "url")
+    __slots__ = ("id", "name", "description", "format")
 
     def __init__(self, *, state: ConnectionState, data: StickerPayload) -> None:
         self._state: ConnectionState = state
diff --git a/discord/widget.py b/discord/widget.py
index 004b87d66e..5b358352f3 100644
--- a/discord/widget.py
+++ b/discord/widget.py
@@ -152,13 +152,9 @@ class WidgetMember(BaseUser):
     """
 
     __slots__ = (
-        "name",
         "status",
         "nick",
         "avatar",
-        "discriminator",
-        "id",
-        "bot",
         "activity",
         "deafened",
         "suppress",
diff --git a/pyproject.toml b/pyproject.toml
index a18aebd5a8..3dacf970d3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -73,6 +73,7 @@ dev = [
     "pytest~=8.3.5",
     "pytest-asyncio~=0.24.0",
     "ruff>=0.11.9",
+    "slotscheck>=0.19.1",
 ]
 
 [tool.hatch.version]
diff --git a/uv.lock b/uv.lock
index ddc382f09f..aae9400c37 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1264,6 +1264,7 @@ dev = [
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "ruff" },
+    { name = "slotscheck" },
 ]
 docs = [
     { name = "furo" },
@@ -1299,6 +1300,7 @@ dev = [
     { name = "pytest", specifier = "~=8.3.5" },
     { name = "pytest-asyncio", specifier = "~=0.24.0" },
     { name = "ruff", specifier = ">=0.11.9" },
+    { name = "slotscheck", specifier = ">=0.19.1" },
 ]
 docs = [
     { name = "furo", specifier = "==2024.8.6" },
@@ -1613,6 +1615,19 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/a3/dc/17031897dae0efacfea57dfd3a82fdd2a2aeb58e0ff71b77b87e44edc772/setuptools-80.9.0-py3-none-any.whl", hash = "sha256:062d34222ad13e0cc312a4c02d73f059e86a4acbfbdea8f8f76b28c99f306922", size = 1201486 },
 ]
 
+[[package]]
+name = "slotscheck"
+version = "0.19.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "click" },
+    { name = "tomli", marker = "python_full_version < '3.11'" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/4b/57/6fcb8df11e7c76eb87b23bfa931408e47f051c6161749c531b4060a45516/slotscheck-0.19.1.tar.gz", hash = "sha256:6146b7747f8db335a00a66b782f86011b74b995f61746dc5b36a9e77d5326013", size = 16050 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/da/32/bd569256267f80b76b87d21a09795741a175778b954bee1d7b1a89852b6f/slotscheck-0.19.1-py3-none-any.whl", hash = "sha256:bff9926f8d6408ea21b6c6bbaa4389cea1682962e73ee4f30084b6d2b89260ee", size = 16995 },
+]
+
 [[package]]
 name = "snowballstemmer"
 version = "3.0.1"