First Commit

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

engine/battle/move_effects/metronome.asm

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+BattleCommand_Metronome:
+	call ClearLastMove
+	call CheckUserIsCharging
+	jr nz, .charging
+
+	ld a, [wBattleAnimParam]
+	push af
+	call BattleCommand_LowerSub
+	pop af
+	ld [wBattleAnimParam], a
+
+.charging
+	call LoadMoveAnim
+
+.GetMove:
+	call ChooseRandomMove
+
+; None of the moves in MetronomeExcepts.
+	ld de, 2
+	ld hl, MetronomeExcepts
+	call IsInWordArray
+	jr c, .GetMove
+	ld h, b
+	ld l, c
+	call GetMoveIDFromIndex
+
+; No moves the user already has.
+	ld b, a
+	call CheckUserMove
+	jr z, .GetMove
+
+	ld a, BATTLE_VARS_MOVE
+	call GetBattleVarAddr
+	ld [hl], b
+	call UpdateMoveData
+	jp ResetTurn
+
+ChooseRandomMove:
+	; chooses a random valid move and returns it in bc
+	call BattleRandom
+	if HIGH(NUM_ATTACKS)
+		maskbits HIGH(NUM_ATTACKS) + 1
+		if HIGH(NUM_ATTACKS) & (HIGH(NUM_ATTACKS) + 1)
+			; if HIGH(NUM_ATTACKS) is not one less than a power of two
+			cp HIGH(NUM_ATTACKS) + 1
+			jr nc, ChooseRandomMove
+		endc
+		ld b, a
+		call BattleRandom
+		ld c, a
+		or b
+		jr z, ChooseRandomMove
+		if LOW(NUM_ATTACKS) != $ff
+			ld a, b
+			cp HIGH(NUM_ATTACKS)
+			ret nz
+			ld a, c
+			cp LOW(NUM_ATTACKS) + 1
+			jr nc, ChooseRandomMove
+		endc
+	else
+		cp NUM_ATTACKS
+		jr nc, ChooseRandomMove
+		inc a
+		ld c, a
+		ld b, 0
+	endc
+	ret
+
+INCLUDE "data/moves/metronome_exception_moves.asm"