Merge pull request #2 from Salsbar/issue/1

Issue/1

Author: Salsbar

.github/workflows/makefile.yml

@@ -2,7 +2,7 @@ name: Makefile CI
 
 on:
   push:
-    branches: [ unovared ]
+    branches: [ unovared, issue/* ]
 
 jobs:
   build:

constants/move_effect_constants.asm

@@ -91,6 +91,7 @@ const_value = 0
 	const LEECH_SEED_EFFECT          ; $54
 	const SPLASH_EFFECT              ; $55
 	const DISABLE_EFFECT             ; $56
+	const ATTACK_UP1_SIDE_EFFECT     ; $57
 
 ; fixed damage constants
 SONICBOOM_DAMAGE   EQU 20

data/moves.asm

@@ -141,7 +141,7 @@ MoveEnd:
         move GIGA_DRAIN,   DRAIN_HP_EFFECT,             75, GRASS,     100, 10
         move SWIFT,        SWIFT_EFFECT,                60, NORMAL,   100, 20
         move SKULL_BASH,   CHARGE_EFFECT,              120, NORMAL,   100, 15
-        move METAL_CLAW,   NO_ADDITIONAL_EFFECT,       50, STEEL,   100, 35
+        move METAL_CLAW,   ATTACK_UP1_SIDE_EFFECT,           50, STEEL,   95, 35
         move IRON_HEAD,    FLINCH_SIDE_EFFECT1,         80, STEEL,   100, 15
         move AMNESIA,      SPECIAL_UP2_EFFECT,           0, PSYCHIC,  100, 20
         move CRUNCH,       DEFENSE_DOWN_SIDE_EFFECT,    80, DARK,   100, 15

engine/battle/core.asm

@@ -7223,6 +7223,7 @@ MoveEffectPointerTable:
 	 dw LeechSeedEffect           ; LEECH_SEED_EFFECT
 	 dw SplashEffect              ; SPLASH_EFFECT
 	 dw DisableEffect             ; DISABLE_EFFECT
+	 dw AttackUp1SideEffect      ; ATTACK_UP1_SIDE_EFFECT
 
 SleepEffect:
 	ld de, wEnemyMonStatus
@@ -8750,4 +8751,22 @@ ShiftGearEffect:
 	ld a, SPEED_UP2_EFFECT
 	ld [wPlayerMoveEffect], a
 	jp StatModifierUpEffect 
-	
+
+AttackUp1SideEffect:
+	ld a, [H_WHOSETURN]
+	and a
+	jr z, .notEnemyTurn
+;Enemy's turn
+	call BattleRandom
+	cp $19 ; ~10% chance
+	ret nc
+	ld a, ATTACK_UP1_EFFECT
+	ld [wEnemyMoveEffect], a
+	jp StatModifierUpEffect
+.notEnemyTurn
+	call BattleRandom
+	cp $19 ; ~10% chance
+	ret nc
+	ld a, ATTACK_UP1_EFFECT
+	ld [wPlayerMoveEffect], a
+	jp StatModifierUpEffect