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core.asm
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; Core components of the battle engine.
DoBattle:
xor a
ld [wBattleParticipantsNotFainted], a
ld [wBattleParticipantsIncludingFainted], a
ld [wBattlePlayerAction], a
ld [wBattleEnded], a
inc a
ld [wBattleHasJustStarted], a
ld hl, wOTPartyMon1HP
ld bc, PARTYMON_STRUCT_LENGTH - 1
ld d, BATTLEACTION_SWITCH1 - 1
.loop
inc d
ld a, [hli]
or [hl]
jr nz, .alive
add hl, bc
jr .loop
.alive
ld a, d
ld [wBattleAction], a
ld a, [wLinkMode]
and a
jr z, .not_linked
ldh a, [hSerialConnectionStatus]
cp USING_INTERNAL_CLOCK
jr z, .player_2
.not_linked
ld a, [wBattleMode]
dec a
jr z, .wild
xor a
ld [wEnemySwitchMonIndex], a
call NewEnemyMonStatus
call ResetEnemyStatLevels
call BreakAttraction
call EnemySwitch
.wild
ld c, 40
call DelayFrames
.player_2
call LoadTileMapToTempTileMap
call CheckPlayerPartyForFitMon
ld a, d
and a
jp z, LostBattle
call Call_LoadTempTileMapToTileMap
ld a, [wBattleType]
cp BATTLETYPE_DEBUG
jp z, .tutorial_debug
cp BATTLETYPE_TUTORIAL
jp z, .tutorial_debug
xor a
ld [wCurPartyMon], a
.loop2
call CheckIfCurPartyMonIsFitToFight
jr nz, .alive2
ld hl, wCurPartyMon
inc [hl]
jr .loop2
.alive2
ld a, [wCurBattleMon]
ld [wLastPlayerMon], a
ld a, [wCurPartyMon]
ld [wCurBattleMon], a
inc a
ld hl, wPartySpecies - 1
ld c, a
ld b, 0
add hl, bc
ld a, [hl]
ld [wCurPartySpecies], a
ld [wTempBattleMonSpecies], a
hlcoord 1, 5
ld a, 9
call SlideBattlePicOut
call LoadTileMapToTempTileMap
call ResetBattleParticipants
call InitBattleMon
call ResetPlayerStatLevels
call SendOutMonText
call NewBattleMonStatus
call BreakAttraction
call SendOutPlayerMon
call EmptyBattleTextbox
call LoadTileMapToTempTileMap
call SetPlayerTurn
call SpikesDamage
ld a, [wLinkMode]
and a
jr z, .not_linked_2
ldh a, [hSerialConnectionStatus]
cp USING_INTERNAL_CLOCK
jr nz, .not_linked_2
xor a
ld [wEnemySwitchMonIndex], a
call NewEnemyMonStatus
call ResetEnemyStatLevels
call BreakAttraction
call EnemySwitch
call SetEnemyTurn
call SpikesDamage
.not_linked_2
jp BattleTurn
.tutorial_debug
jp BattleMenu
WildFled_EnemyFled_LinkBattleCanceled:
call Call_LoadTempTileMapToTileMap
ld a, [wBattleResult]
and BATTLERESULT_BITMASK
add DRAW
ld [wBattleResult], a
ld a, [wLinkMode]
and a
ld hl, BattleText_WildFled
jr z, .print_text
ld a, [wBattleResult]
and BATTLERESULT_BITMASK
ld [wBattleResult], a ; WIN
ld hl, BattleText_EnemyFled
call CheckMobileBattleError
jr nc, .print_text
ld hl, wcd2a
bit 4, [hl]
jr nz, .skip_text
ld hl, BattleText_LinkErrorBattleCanceled
.print_text
call StdBattleTextbox
.skip_text
call StopDangerSound
call CheckMobileBattleError
jr c, .skip_sfx
ld de, SFX_RUN
call PlaySFX
.skip_sfx
call SetPlayerTurn
ld a, 1
ld [wBattleEnded], a
ret
BattleTurn:
.loop
call Stubbed_Function3c1bf
call CheckContestBattleOver
jp c, .quit
xor a
ld [wPlayerIsSwitching], a
ld [wEnemyIsSwitching], a
ld [wBattleHasJustStarted], a
ld [wPlayerJustGotFrozen], a
ld [wEnemyJustGotFrozen], a
ld [wCurDamage], a
ld [wCurDamage + 1], a
call HandleBerserkGene
call UpdateBattleMonInParty
farcall AIChooseMove
call IsMobileBattle
jr nz, .not_disconnected
farcall Function100da5
farcall StartMobileInactivityTimer
farcall Function100dd8
jp c, .quit
.not_disconnected
call CheckPlayerLockedIn
jr c, .skip_iteration
.loop1
call BattleMenu
jr c, .quit
ld a, [wBattleEnded]
and a
jr nz, .quit
ld a, [wForcedSwitch] ; roared/whirlwinded/teleported
and a
jr nz, .quit
.skip_iteration
call ParsePlayerAction
jr nz, .loop1
call EnemyTriesToFlee
jr c, .quit
call DetermineMoveOrder
jr c, .false
call Battle_EnemyFirst
jr .proceed
.false
call Battle_PlayerFirst
.proceed
call CheckMobileBattleError
jr c, .quit
ld a, [wForcedSwitch]
and a
jr nz, .quit
ld a, [wBattleEnded]
and a
jr nz, .quit
call HandleBetweenTurnEffects
ld a, [wBattleEnded]
and a
jr nz, .quit
jp .loop
.quit
ret
Stubbed_Function3c1bf:
ret
ld a, 5 ; MBC30 bank used by JP Crystal; inaccessible by MBC3
call GetSRAMBank
ld hl, $a89b ; address of MBC30 bank
inc [hl]
jr nz, .finish
dec hl
inc [hl]
jr nz, .finish
dec [hl]
inc hl
dec [hl]
.finish
call CloseSRAM
ret
HandleBetweenTurnEffects:
ldh a, [hSerialConnectionStatus]
cp USING_EXTERNAL_CLOCK
jr z, .CheckEnemyFirst
call CheckFaint_PlayerThenEnemy
ret c
call HandleFutureSight
call CheckFaint_PlayerThenEnemy
ret c
call HandleWeather
call CheckFaint_PlayerThenEnemy
ret c
call HandleWrap
call CheckFaint_PlayerThenEnemy
ret c
call HandlePerishSong
call CheckFaint_PlayerThenEnemy
ret c
jr .NoMoreFaintingConditions
.CheckEnemyFirst:
call CheckFaint_EnemyThenPlayer
ret c
call HandleFutureSight
call CheckFaint_EnemyThenPlayer
ret c
call HandleWeather
call CheckFaint_EnemyThenPlayer
ret c
call HandleWrap
call CheckFaint_EnemyThenPlayer
ret c
call HandlePerishSong
call CheckFaint_EnemyThenPlayer
ret c
.NoMoreFaintingConditions:
call HandleLeftovers
call HandleMysteryberry
call HandleDefrost
call HandleSafeguard
call HandleScreens
call HandleStatBoostingHeldItems
call HandleHealingItems
call UpdateBattleMonInParty
call LoadTileMapToTempTileMap
jp HandleEncore
CheckFaint_PlayerThenEnemy:
call HasPlayerFainted
jr nz, .PlayerNotFainted
call HandlePlayerMonFaint
ld a, [wBattleEnded]
and a
jr nz, .BattleIsOver
.PlayerNotFainted:
call HasEnemyFainted
jr nz, .BattleContinues
call HandleEnemyMonFaint
ld a, [wBattleEnded]
and a
jr nz, .BattleIsOver
.BattleContinues:
and a
ret
.BattleIsOver:
scf
ret
CheckFaint_EnemyThenPlayer:
call HasEnemyFainted
jr nz, .EnemyNotFainted
call HandleEnemyMonFaint
ld a, [wBattleEnded]
and a
jr nz, .BattleIsOver
.EnemyNotFainted:
call HasPlayerFainted
jr nz, .BattleContinues
call HandlePlayerMonFaint
ld a, [wBattleEnded]
and a
jr nz, .BattleIsOver
.BattleContinues:
and a
ret
.BattleIsOver:
scf
ret
HandleBerserkGene:
ldh a, [hSerialConnectionStatus]
cp USING_EXTERNAL_CLOCK
jr z, .reverse
call .player
jr .enemy
.reverse
call .enemy
; fallthrough
.player
call SetPlayerTurn
ld de, wPartyMon1Item
ld a, [wCurBattleMon]
ld b, a
jr .go
.enemy
call SetEnemyTurn
ld de, wOTPartyMon1Item
ld a, [wCurOTMon]
ld b, a
; fallthrough
.go
push de
push bc
callfar GetUserItem
ld a, [hl]
ld [wNamedObjectIndexBuffer], a
sub BERSERK_GENE
pop bc
pop de
ret nz
ld [hl], a
ld h, d
ld l, e
ld a, b
call GetPartyLocation
xor a
ld [hl], a
ld a, BATTLE_VARS_SUBSTATUS3
call GetBattleVarAddr
push af
set SUBSTATUS_CONFUSED, [hl]
ld a, BATTLE_VARS_MOVE_ANIM
call GetBattleVarAddr
push hl
push af
xor a
ld [hl], a
ld [wAttackMissed], a
ld [wEffectFailed], a
farcall BattleCommand_AttackUp2
pop af
pop hl
ld [hl], a
call GetItemName
ld hl, BattleText_UsersStringBuffer1Activated
call StdBattleTextbox
callfar BattleCommand_StatUpMessage
pop af
bit SUBSTATUS_CONFUSED, a
ret nz
xor a
ld [wNumHits], a
ld de, ANIM_CONFUSED
call Call_PlayBattleAnim_OnlyIfVisible
call SwitchTurnCore
ld hl, BecameConfusedText
jp StdBattleTextbox
EnemyTriesToFlee:
ld a, [wLinkMode]
and a
jr z, .not_linked
ld a, [wBattleAction]
cp BATTLEACTION_FORFEIT
jr z, .forfeit
.not_linked
and a
ret
.forfeit
call WildFled_EnemyFled_LinkBattleCanceled
scf
ret
DetermineMoveOrder:
ld a, [wLinkMode]
and a
jr z, .use_move
ld a, [wBattleAction]
cp BATTLEACTION_STRUGGLE
jr z, .use_move
cp BATTLEACTION_SKIPTURN
jr z, .use_move
sub BATTLEACTION_SWITCH1
jr c, .use_move
ld a, [wBattlePlayerAction]
cp BATTLEPLAYERACTION_SWITCH
jr nz, .switch
ldh a, [hSerialConnectionStatus]
cp USING_INTERNAL_CLOCK
jr z, .player_2
call BattleRandom
cp 50 percent + 1
jp c, .player_first
jp .enemy_first
.player_2
call BattleRandom
cp 50 percent + 1
jp c, .enemy_first
jp .player_first
.switch
callfar AI_Switch
call SetEnemyTurn
call SpikesDamage
jp .enemy_first
.use_move
ld a, [wBattlePlayerAction]
and a ; BATTLEPLAYERACTION_USEMOVE?
jp nz, .player_first
call CompareMovePriority
jr z, .equal_priority
jp c, .player_first ; player goes first
jp .enemy_first
.equal_priority
call SetPlayerTurn
callfar GetUserItem
push bc
callfar GetOpponentItem
pop de
ld a, d
cp HELD_QUICK_CLAW
jr nz, .player_no_quick_claw
ld a, b
cp HELD_QUICK_CLAW
jr z, .both_have_quick_claw
call BattleRandom
cp e
jr nc, .speed_check
jp .player_first
.player_no_quick_claw
ld a, b
cp HELD_QUICK_CLAW
jr nz, .speed_check
call BattleRandom
cp c
jr nc, .speed_check
jp .enemy_first
.both_have_quick_claw
ldh a, [hSerialConnectionStatus]
cp USING_INTERNAL_CLOCK
jr z, .player_2b
call BattleRandom
cp c
jp c, .enemy_first
call BattleRandom
cp e
jp c, .player_first
jr .speed_check
.player_2b
call BattleRandom
cp e
jp c, .player_first
call BattleRandom
cp c
jp c, .enemy_first
jr .speed_check
.speed_check
ld de, wBattleMonSpeed
ld hl, wEnemyMonSpeed
ld c, 2
call CompareBytes
jr z, .speed_tie
jp nc, .player_first
jp .enemy_first
.speed_tie
ldh a, [hSerialConnectionStatus]
cp USING_INTERNAL_CLOCK
jr z, .player_2c
call BattleRandom
cp 50 percent + 1
jp c, .player_first
jp .enemy_first
.player_2c
call BattleRandom
cp 50 percent + 1
jp c, .enemy_first
.player_first
scf
ret
.enemy_first
and a
ret
CheckContestBattleOver:
ld a, [wBattleType]
cp BATTLETYPE_CONTEST
jr nz, .contest_not_over
ld a, [wParkBallsRemaining]
and a
jr nz, .contest_not_over
ld a, [wBattleResult]
and BATTLERESULT_BITMASK
add DRAW
ld [wBattleResult], a
scf
ret
.contest_not_over
and a
ret
CheckPlayerLockedIn:
ld a, [wPlayerSubStatus4]
and 1 << SUBSTATUS_RECHARGE
jp nz, .quit
ld hl, wEnemySubStatus3
res SUBSTATUS_FLINCHED, [hl]
ld hl, wPlayerSubStatus3
res SUBSTATUS_FLINCHED, [hl]
ld a, [hl]
and 1 << SUBSTATUS_CHARGED | 1 << SUBSTATUS_RAMPAGE
jp nz, .quit
ld hl, wPlayerSubStatus1
bit SUBSTATUS_ROLLOUT, [hl]
jp nz, .quit
and a
ret
.quit
scf
ret
ParsePlayerAction:
call CheckPlayerLockedIn
jp c, .locked_in
ld hl, wPlayerSubStatus5
bit SUBSTATUS_ENCORED, [hl]
jr z, .not_encored
ld a, [wLastPlayerMove]
ld [wCurPlayerMove], a
jr .encored
.not_encored
ld a, [wBattlePlayerAction]
cp BATTLEPLAYERACTION_SWITCH
jp z, .reset_rage
and a
jr nz, .reset_bide
ld a, [wPlayerSubStatus3]
and 1 << SUBSTATUS_BIDE
jr nz, .locked_in
xor a
ld [wMoveSelectionMenuType], a
if HIGH(POUND)
ld a, HIGH(POUND)
endc
ld [wFXAnimID + 1], a
if LOW(POUND) == (HIGH(POUND) + 1)
inc a
else
ld a, LOW(POUND)
endc
ld [wFXAnimID], a
call MoveSelectionScreen
push af
call Call_LoadTempTileMapToTileMap
call UpdateBattleHuds
ld a, [wCurPlayerMove]
call GetMoveIndexFromID
ld a, h
if HIGH(STRUGGLE)
cp HIGH(STRUGGLE)
else
and a
endc
jr nz, .not_struggle
ld a, l
cp LOW(STRUGGLE)
.not_struggle
call nz, PlayClickSFX
ld a, $1
ldh [hBGMapMode], a
pop af
ret nz
.encored
call SetPlayerTurn
callfar UpdateMoveData
xor a
ld [wPlayerCharging], a
ld a, [wPlayerMoveStruct + MOVE_EFFECT]
cp EFFECT_FURY_CUTTER
jr z, .continue_fury_cutter
xor a
ld [wPlayerFuryCutterCount], a
.continue_fury_cutter
ld a, [wPlayerMoveStruct + MOVE_EFFECT]
cp EFFECT_RAGE
jr z, .continue_rage
ld hl, wPlayerSubStatus4
res SUBSTATUS_RAGE, [hl]
xor a
ld [wPlayerRageCounter], a
.continue_rage
ld a, [wPlayerMoveStruct + MOVE_EFFECT]
cp EFFECT_PROTECT
jr z, .continue_protect
cp EFFECT_ENDURE
jr z, .continue_protect
xor a
ld [wPlayerProtectCount], a
jr .continue_protect
.reset_bide
ld hl, wPlayerSubStatus3
res SUBSTATUS_BIDE, [hl]
.locked_in
xor a
ld [wPlayerFuryCutterCount], a
ld [wPlayerProtectCount], a
ld [wPlayerRageCounter], a
ld hl, wPlayerSubStatus4
res SUBSTATUS_RAGE, [hl]
.continue_protect
call ParseEnemyAction
xor a
ret
.reset_rage
xor a
ld [wPlayerFuryCutterCount], a
ld [wPlayerProtectCount], a
ld [wPlayerRageCounter], a
ld hl, wPlayerSubStatus4
res SUBSTATUS_RAGE, [hl]
xor a
ret
HandleEncore:
ldh a, [hSerialConnectionStatus]
cp USING_EXTERNAL_CLOCK
jr z, .player_1
call .do_player
jr .do_enemy
.player_1
call .do_enemy
.do_player
ld hl, wPlayerSubStatus5
bit SUBSTATUS_ENCORED, [hl]
ret z
ld a, [wPlayerEncoreCount]
dec a
ld [wPlayerEncoreCount], a
jr z, .end_player_encore
ld hl, wBattleMonPP
ld a, [wCurMoveNum]
ld c, a
ld b, 0
add hl, bc
ld a, [hl]
and PP_MASK
ret nz
.end_player_encore
ld hl, wPlayerSubStatus5
res SUBSTATUS_ENCORED, [hl]
call SetEnemyTurn
ld hl, BattleText_TargetsEncoreEnded
jp StdBattleTextbox
.do_enemy
ld hl, wEnemySubStatus5
bit SUBSTATUS_ENCORED, [hl]
ret z
ld a, [wEnemyEncoreCount]
dec a
ld [wEnemyEncoreCount], a
jr z, .end_enemy_encore
ld hl, wEnemyMonPP
ld a, [wCurEnemyMoveNum]
ld c, a
ld b, 0
add hl, bc
ld a, [hl]
and PP_MASK
ret nz
.end_enemy_encore
ld hl, wEnemySubStatus5
res SUBSTATUS_ENCORED, [hl]
call SetPlayerTurn
ld hl, BattleText_TargetsEncoreEnded
jp StdBattleTextbox
TryEnemyFlee:
ld a, [wBattleMode]
dec a
jr nz, .Stay
ld a, [wPlayerSubStatus5]
bit SUBSTATUS_CANT_RUN, a
jr nz, .Stay
ld a, [wEnemyWrapCount]
and a
jr nz, .Stay
ld a, [wEnemyMonStatus]
and 1 << FRZ | SLP
jr nz, .Stay
ld a, [wTempEnemyMonSpecies]
call GetPokemonIndexFromID
ld b, h
ld c, l
ld de, 2
ld hl, AlwaysFleeMons
call IsInHalfwordArray
jr c, .Flee
call BattleRandom
add a, a
jr nc, .Stay
push af
; de preserved from last call
ld hl, OftenFleeMons
call IsInHalfwordArray
pop de
jr c, .Flee
ld a, d
cp 20 percent ; double the value because of the previous add a, a
jr nc, .Stay
ld de, 2
ld hl, SometimesFleeMons
call IsInHalfwordArray
jr c, .Flee
.Stay:
and a
ret
.Flee:
scf
ret
INCLUDE "data/wild/flee_mons.asm"
CompareMovePriority:
; Compare the priority of the player and enemy's moves.
; Return carry if the player goes first, or z if they match.
ld a, [wCurPlayerMove]
call GetMovePriority
ld b, a
push bc
ld a, [wCurEnemyMove]
call GetMovePriority
pop bc
cp b
ret
GetMovePriority:
; Return the priority (0-3) of move a.
ld b, a
; Vital Throw goes last.
call GetMoveIndexFromID
ld a, h
if HIGH(VITAL_THROW)
cp HIGH(VITAL_THROW)
else
and a
endc
jr nz, .not_vital_throw
ld a, l
sub LOW(VITAL_THROW)
ret z
.not_vital_throw
call GetMoveEffect
ld hl, MoveEffectPriorities
.loop
ld a, [hli]
cp b
jr z, .done
inc hl
cp -1
jr nz, .loop
ld a, BASE_PRIORITY
ret
.done
ld a, [hl]
ret
INCLUDE "data/moves/effects_priorities.asm"
GetMoveEffect:
ld l, b
ld a, MOVE_EFFECT
call GetMoveAttribute
ld b, a
ret
Battle_EnemyFirst:
call LoadTileMapToTempTileMap
call TryEnemyFlee
jp c, WildFled_EnemyFled_LinkBattleCanceled
call SetEnemyTurn
ld a, $1
ld [wEnemyGoesFirst], a
callfar AI_SwitchOrTryItem
jr c, .switch_item
call EnemyTurn_EndOpponentProtectEndureDestinyBond
call CheckMobileBattleError
ret c
ld a, [wForcedSwitch]
and a
ret nz
call HasPlayerFainted
jp z, HandlePlayerMonFaint
call HasEnemyFainted
jp z, HandleEnemyMonFaint
.switch_item
call SetEnemyTurn
call ResidualDamage
jp z, HandleEnemyMonFaint
call RefreshBattleHuds
call PlayerTurn_EndOpponentProtectEndureDestinyBond
call CheckMobileBattleError
ret c
ld a, [wForcedSwitch]
and a
ret nz
call HasEnemyFainted
jp z, HandleEnemyMonFaint
call HasPlayerFainted
jp z, HandlePlayerMonFaint
call SetPlayerTurn
call ResidualDamage
jp z, HandlePlayerMonFaint
call RefreshBattleHuds
xor a ; BATTLEPLAYERACTION_USEMOVE
ld [wBattlePlayerAction], a
ret
Battle_PlayerFirst:
xor a
ld [wEnemyGoesFirst], a
call SetEnemyTurn
callfar AI_SwitchOrTryItem
push af
call PlayerTurn_EndOpponentProtectEndureDestinyBond
pop bc
ld a, [wForcedSwitch]
and a
ret nz
call CheckMobileBattleError
ret c
call HasEnemyFainted
jp z, HandleEnemyMonFaint
call HasPlayerFainted
jp z, HandlePlayerMonFaint
push bc
call SetPlayerTurn
call ResidualDamage
pop bc
jp z, HandlePlayerMonFaint
push bc
call RefreshBattleHuds
pop af
jr c, .switched_or_used_item
call LoadTileMapToTempTileMap
call TryEnemyFlee
jp c, WildFled_EnemyFled_LinkBattleCanceled
call EnemyTurn_EndOpponentProtectEndureDestinyBond
call CheckMobileBattleError
ret c
ld a, [wForcedSwitch]
and a
ret nz
call HasPlayerFainted
jp z, HandlePlayerMonFaint
call HasEnemyFainted
jp z, HandleEnemyMonFaint
.switched_or_used_item
call SetEnemyTurn
call ResidualDamage
jp z, HandleEnemyMonFaint
call RefreshBattleHuds
xor a ; BATTLEPLAYERACTION_USEMOVE
ld [wBattlePlayerAction], a
ret
PlayerTurn_EndOpponentProtectEndureDestinyBond:
call SetPlayerTurn
call EndUserDestinyBond
callfar DoPlayerTurn
jp EndOpponentProtectEndureDestinyBond
EnemyTurn_EndOpponentProtectEndureDestinyBond:
call SetEnemyTurn
call EndUserDestinyBond
callfar DoEnemyTurn
jp EndOpponentProtectEndureDestinyBond
EndOpponentProtectEndureDestinyBond:
ld a, BATTLE_VARS_SUBSTATUS1_OPP
call GetBattleVarAddr
res SUBSTATUS_PROTECT, [hl]
res SUBSTATUS_ENDURE, [hl]
ld a, BATTLE_VARS_SUBSTATUS5_OPP
call GetBattleVarAddr
res SUBSTATUS_DESTINY_BOND, [hl]
ret
EndUserDestinyBond:
ld a, BATTLE_VARS_SUBSTATUS5
call GetBattleVarAddr