First Commit

Upload literally everything from the pokecrystal16 expand-move-ID branch

engine/battle/move_effects/fury_cutter.asm

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+BattleCommand_FuryCutter:
+	ld hl, wPlayerFuryCutterCount
+	ldh a, [hBattleTurn]
+	and a
+	jr z, .go
+	ld hl, wEnemyFuryCutterCount
+
+.go
+	ld a, [wAttackMissed]
+	and a
+	jp nz, ResetFuryCutterCount
+
+	inc [hl]
+
+; Damage capped at 5 turns' worth (16x).
+	ld a, [hl]
+	ld b, a
+	cp 6
+	jr c, .checkdouble
+	ld b, 5
+
+.checkdouble
+	dec b
+	ret z
+
+; Double the damage
+	ld hl, wCurDamage + 1
+	sla [hl]
+	dec hl
+	rl [hl]
+	jr nc, .checkdouble
+
+; No overflow
+	ld a, $ff
+	ld [hli], a
+	ld [hl], a
+	ret
+
+ResetFuryCutterCount:
+	push hl
+
+	ld hl, wPlayerFuryCutterCount
+	ldh a, [hBattleTurn]
+	and a
+	jr z, .reset
+	ld hl, wEnemyFuryCutterCount
+
+.reset
+	xor a
+	ld [hl], a
+
+	pop hl
+	ret