Remove unnecessary DMG and SGB checking (#7)

engine/battle_anims/anim_commands.asm

@@ -176,10 +176,6 @@ BattleAnimRestoreHuds:
 	ret
 
 BattleAnimRequestPals:
-	ldh a, [hCGB]
-	and a
-	ret z
-
 	ldh a, [rBGP]
 	ld b, a
 	ld a, [wBGP]
@@ -643,12 +639,7 @@ BattleAnimCmd_OBP1:
 	ret
 
 BattleAnimCmd_ResetObp0:
-	ldh a, [hSGB]
-	and a
 	ld a, $e0
-	jr z, .not_sgb
-	ld a, $f0
-.not_sgb
 	ld [wOBP0], a
 	ret
 
@@ -1336,23 +1327,6 @@ PlayHitSound:
 	ret
 
 BattleAnimAssignPals:
-	ldh a, [hCGB]
-	and a
-	jr nz, .cgb
-	ldh a, [hSGB]
-	and a
-	ld a, %11100000
-	jr z, .sgb
-	ld a, %11110000
-
-.sgb
-	ld [wOBP0], a
-	ld a, %11100100
-	ld [wBGP], a
-	ld [wOBP1], a
-	ret
-
-.cgb
 	ld a, %11100100
 	ld [wBGP], a
 	ld [wOBP0], a
@@ -1405,9 +1379,6 @@ BattleAnim_RevertPals:
 
 BattleAnim_SetBGPals:
 	ldh [rBGP], a
-	ldh a, [hCGB]
-	and a
-	ret z
 	ldh a, [rSVBK]
 	push af
 	ld a, BANK(wBGPals1)
@@ -1432,9 +1403,6 @@ BattleAnim_SetBGPals:
 
 BattleAnim_SetOBPals:
 	ldh [rOBP0], a
-	ldh a, [hCGB]
-	and a
-	ret z
 	ldh a, [rSVBK]
 	push af
 	ld a, BANK(wOBPals1)

engine/battle_anims/bg_effects.asm

@@ -281,14 +281,7 @@ BattleBGEffect_AlternateHues:
 	db -2
 
 BattleBGEffect_CycleOBPalsGrayAndYellow:
-	call BattleBGEffects_CheckSGB
-	jr nz, .sgb
 	ld de, .PalsCGB
-	jr .okay
-
-.sgb
-	ld de, .PalsSGB
-.okay
 	call BattleBGEffect_GetNthDMGPal
 	ld [wOBP0], a
 	ret
@@ -304,14 +297,7 @@ BattleBGEffect_CycleOBPalsGrayAndYellow:
 	db -2
 
 BattleBGEffect_CycleMidOBPalsGrayAndYellow:
-	call BattleBGEffects_CheckSGB
-	jr nz, .sgb
 	ld de, .PalsCGB
-	jr .okay
-
-.sgb
-	ld de, .PalsSGB
-.okay
 	call BattleBGEffect_GetNthDMGPal
 	ld [wOBP0], a
 	ret
@@ -1955,90 +1941,6 @@ BattleBGEffect_BetaSendOutMon2: ; unused
 	ret
 
 BattleBGEffect_FadeMonsToBlackRepeating:
-	ldh a, [hCGB]
-	and a
-	jr nz, .cgb
-	call BattleBGEffects_AnonJumptable
-.anon_dw
-	dw .zero
-	dw .one
-	dw .two
-
-.zero
-	call BattleBGEffects_IncAnonJumptableIndex
-	ld a, $e4
-	call BattleBGEffects_SetLYOverrides
-	ld a, LOW(rBGP)
-	ldh [hLCDCPointer], a
-	xor a
-	ldh [hLYOverrideStart], a
-	ld a, $60
-	ldh [hLYOverrideEnd], a
-	ret
-
-.one
-	ld hl, BG_EFFECT_STRUCT_PARAM
-	add hl, bc
-	ld a, [hl]
-	inc [hl]
-	ld e, a
-	and $7
-	ret nz
-	ld a, e
-	and $18
-	sla a
-	swap a
-	sla a
-	ld e, a
-	ld d, 0
-	push bc
-	call BGEffect_CheckBattleTurn
-	jr nz, .player
-	ld hl, .CGB_DMGEnemyData
-	add hl, de
-	ld a, [hli]
-	ld [wOBP1], a
-	ld d, a
-	ld e, [hl]
-	lb bc, $2f, $30
-	jr .okay
-
-.player
-	ld hl, .DMG_PlayerData
-	add hl, de
-	ld d, [hl]
-	inc hl
-	ld a, [hl]
-	ld [wOBP1], a
-	ld e, a
-	lb bc, $37, $28
-.okay
-	call .DMG_LYOverrideLoads
-	pop bc
-	ret
-
-.two
-	call BattleBGEffects_ResetVideoHRAM
-	ld a, $e4
-	ld [wBGP], a
-	ld [wOBP1], a
-	ret
-
-.DMG_LYOverrideLoads:
-	ld hl, wLYOverridesBackup
-.loop1
-	ld [hl], d
-	inc hl
-	dec b
-	jr nz, .loop1
-.loop2
-	ld [hl], e
-	inc hl
-	dec c
-	jr nz, .loop2
-	ret
-
-.cgb
 	ld de, .Jumptable
 	call BatttleBGEffects_GetNamedJumptablePointer
 	jp hl
@@ -2397,71 +2299,6 @@ BattleBGEffect_GetNthDMGPal:
 
 BGEffect_RapidCyclePals:
 ; Last index in DE: $fe signals a loop, $ff signals end
-	ldh a, [hCGB]
-	and a
-	jr nz, .cgb
-	push de
-	ld de, .Jumptable_DMG
-	call BatttleBGEffects_GetNamedJumptablePointer
-	pop de
-	jp hl
-
-.Jumptable_DMG:
-	dw .zero_dmg
-	dw .one_dmg
-	dw .two_dmg
-
-.zero_dmg
-	call BattleBGEffects_IncAnonJumptableIndex
-	ld a, $e4
-	call BattleBGEffects_SetLYOverrides
-	ld a, $47
-	call BattleBGEffect_SetLCDStatCustoms1
-	ldh a, [hLYOverrideEnd]
-	inc a
-	ldh [hLYOverrideEnd], a
-	ld hl, BG_EFFECT_STRUCT_PARAM
-	add hl, bc
-	ld a, [hl]
-	ld [hl], $0
-	ld hl, BG_EFFECT_STRUCT_BATTLE_TURN
-	add hl, bc
-	ld [hl], a
-	ret
-
-.one_dmg
-	ld hl, BG_EFFECT_STRUCT_BATTLE_TURN
-	add hl, bc
-	ld a, [hl]
-	and $f
-	jr z, .okay_1_dmg
-	dec [hl]
-	ret
-
-.okay_1_dmg
-	ld a, [hl]
-	swap a
-	or [hl]
-	ld [hl], a
-	call BattleBGEffect_GetFirstDMGPal
-	jr c, .okay_2_dmg
-	call BGEffect_FillLYOverridesBackup
-	ret
-
-.okay_2_dmg
-	ld hl, BG_EFFECT_STRUCT_PARAM
-	add hl, bc
-	dec [hl]
-	ret
-
-.two_dmg
-	call BattleBGEffects_ResetVideoHRAM
-	ld a, %11100100
-	ldh [rBGP], a
-	call EndBattleBGEffect
-	ret
-
-.cgb
 	push de
 	ld de, .Jumptable_CGB
 	call BatttleBGEffects_GetNamedJumptablePointer
@@ -2919,11 +2756,6 @@ BGEffect_CheckFlyDigStatus:
 	and 1 << SUBSTATUS_FLYING | 1 << SUBSTATUS_UNDERGROUND
 	ret
 
-BattleBGEffects_CheckSGB:
-	ldh a, [hSGB]
-	and a
-	ret
-
 BattleBGEffects_Sine:
 	ld e, a
 	callfar BattleAnim_Sine_e

engine/battle_anims/functions.asm

@@ -3399,15 +3399,7 @@ BattleAnimFunction_SkyAttack:
 	srl a
 	ld e, a
 	ld d, 0
-	ldh a, [hSGB]
-	and a
-	jr nz, .sgb
 	ld hl, .GBCPals
-	jr .got_pals
-
-.sgb
-	ld hl, .SGBPals
-.got_pals
 	add hl, de
 	ld a, [hl]
 	ld hl, BATTLEANIMSTRUCT_VAR1