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Clean up bugs commented in the source code (#912)

Browse Source 
Co-authored-by: Rangi <remy.oukaour+rangi42@gmail.com>
This commit is contained in:
vulcandth 2022-07-09 16:12:02 -05:00 committed by GitHub
parent bd27c0d8dc
commit ef9b9bb437
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GPG Key ID: 4AEE18F83AFDEB23
49 changed files with 267 additions and 324 deletions
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1
data/battle/ai/sunny_day_moves.asm
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@ -1,6 +1,7 @@
; AI_SMART prefers these moves during harsh sunlight.
SunnyDayMoves:
; BUG: "Smart" AI does not encourage Solar Beam, Flame Wheel, or Moonlight during Sunny Day (see docs/bugs_and_glitches.md)
db FIRE_PUNCH
db EMBER
db FLAMETHROWER

1
data/events/happiness_probabilities.asm
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@ -9,4 +9,5 @@ HappinessData_YoungerHaircutBrother:
db -1, 4, HAPPINESS_YOUNGCUT3 ; 10% chance
HappinessData_DaisysGrooming:
; BUG: Daisy's grooming doesn't always increase happiness (see docs/bugs_and_glitches.md)
db -1, 2, HAPPINESS_GROOMING ; 99.6% chance

1
data/items/attributes.asm
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@ -294,6 +294,7 @@ ItemAttributes:
item_attribute $9999, HELD_NONE, 0, NO_LIMITS, ITEM, ITEMMENU_NOUSE, ITEMMENU_NOUSE
; METAL_COAT
item_attribute 100, HELD_STEEL_BOOST, 10, CANT_SELECT, ITEM, ITEMMENU_NOUSE, ITEMMENU_NOUSE
; BUG: Dragon Scale, not Dragon Fang, boosts Dragon-type moves (see docs/bugs_and_glitches.md)
; DRAGON_FANG
item_attribute 100, HELD_NONE, 0, CANT_SELECT, ITEM, ITEMMENU_NOUSE, ITEMMENU_NOUSE
; ITEM_91

4
data/moves/effects.asm
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@ -575,7 +575,8 @@ DefenseDownHit:
supereffectivetext
checkfaint
buildopponentrage
effectchance ; bug: duplicate effectchance shouldn't be here
; BUG: Moves that lower Defense can do so after breaking a Substitute (see docs/bugs_and_glitches.md)
effectchance
defensedown
statdownmessage
endmove
@ -706,6 +707,7 @@ DefenseUpHit:
applydamage
criticaltext
supereffectivetext
; BUG: Moves that do damage and increase your stats do not increase stats after a KO (see docs/bugs_and_glitches.md)
checkfaint
buildopponentrage
defenseup

2
data/text/common_2.asm
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@ -100,6 +100,7 @@ Text_Gained::
text_end
_BoostedExpPointsText::
; BUG: Five-digit experience gain is printed incorrectly (see docs/bugs_and_glitches.md)
text_start
line "a boosted"
cont "@"
@ -108,6 +109,7 @@ _BoostedExpPointsText::
prompt
_ExpPointsText::
; BUG: Five-digit experience gain is printed incorrectly (see docs/bugs_and_glitches.md)
text_start
line "@"
text_decimal wStringBuffer2, 2, 4

1
data/trainers/dvs.asm
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@ -43,6 +43,7 @@ TrainerClassDVs:
dn 7, 8, 8, 8 ; SWIMMERF
dn 9, 8, 8, 8 ; SAILOR
dn 9, 8, 8, 8 ; SUPER_NERD
; BUG: RIVAL2 has lower DVs than RIVAL1 (see docs/bugs_and_glitches.md)
dn 9, 8, 8, 8 ; RIVAL2
dn 9, 8, 8, 8 ; GUITARIST
dn 10, 8, 8, 8 ; HIKER

332
docs/bugs_and_glitches.md
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File diff suppressed because it is too large Load Diff

11
engine/battle/ai/items.asm
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@ -552,6 +552,7 @@ EnemyUsedMaxPotion:
jr FullRestoreContinue
EnemyUsedFullRestore:
; BUG: AI use of Full Heal does not cure confusion status (see docs/bugs_and_glitches.md)
call AI_HealStatus
ld a, FULL_RESTORE
ld [wCurEnemyItem], a
@ -559,6 +560,7 @@ EnemyUsedFullRestore:
res SUBSTATUS_CONFUSED, [hl]
xor a
ld [wEnemyConfuseCount], a
; fallthrough
FullRestoreContinue:
ld de, wCurHPAnimOldHP
@ -725,6 +727,7 @@ EnemyUsedFullHealRed: ; unreferenced
jp PrintText_UsedItemOn_AND_AIUpdateHUD
AI_HealStatus:
; BUG: AI use of Full Heal or Full Restore does not cure Nightmare status (see docs/bugs_and_glitches.md)
ld a, [wCurOTMon]
ld hl, wOTPartyMon1Status
ld bc, PARTYMON_STRUCT_LENGTH
@ -732,14 +735,6 @@ AI_HealStatus:
xor a
ld [hl], a
ld [wEnemyMonStatus], a
; Bug: this should reset SUBSTATUS_NIGHTMARE
; Uncomment the 2 lines below to fix
; ld hl, wEnemySubStatus1
; res SUBSTATUS_NIGHTMARE, [hl]
; Bug: this should reset SUBSTATUS_CONFUSED
; Uncomment the 2 lines below to fix
; ld hl, wEnemySubStatus3
; res SUBSTATUS_CONFUSED, [hl]
ld hl, wEnemySubStatus5
res SUBSTATUS_TOXIC, [hl]
ret

1
engine/battle/ai/redundant.asm
View File

@ -176,6 +176,7 @@ AI_Redundant:
ret
.FutureSight:
; BUG: AI does not discourage Future Sight when it's already been used (see docs/bugs_and_glitches.md)
ld a, [wEnemyScreens]
bit 5, a
ret

7
engine/battle/ai/scoring.asm
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@ -1665,9 +1665,10 @@ AI_Smart_Thief:
ret
AI_Smart_Conversion2:
; BUG: "Smart" AI discourages Conversion2 after the first turn (see docs/bugs_and_glitches.md)
ld a, [wLastPlayerMove]
and a
jr nz, .discourage ; should be jr z
jr nz, .discourage
push hl
dec a
@ -1743,8 +1744,8 @@ AI_Smart_MeanLook:
pop hl
jp z, AIDiscourageMove
; 80% chance to greatly encourage this move if the enemy is badly poisoned (buggy).
; Should check wPlayerSubStatus5 instead.
; 80% chance to greatly encourage this move if the enemy is badly poisoned.
; BUG: "Smart" AI encourages Mean Look if its own Pokémon is badly poisoned (see docs/bugs_and_glitches.md)
ld a, [wEnemySubStatus5]
bit SUBSTATUS_TOXIC, a
jr nz, .encourage

13
engine/battle/anim_hp_bar.asm
View File

@ -179,16 +179,12 @@ LongAnim_UpdateVariables:
ld c, a
ld a, [hli]
ld b, a
; This routine is buggy. The result from ComputeHPBarPixels is stored
; in e. However, the pop de opcode deletes this result before it is even
; used. The game then proceeds as though it never deleted that output.
; To fix, uncomment the line below.
; BUG: HP bar animation is slow for high HP (see docs/bugs_and_glitches.md)
call ComputeHPBarPixels
; ld a, e
pop bc
pop de
pop hl
ld a, e ; Comment or delete this line to fix the above bug.
ld a, e
ld hl, wCurHPBarPixels
cp [hl]
jr z, .loop
@ -373,17 +369,14 @@ ShortHPBar_CalcPixelFrame:
call AddNTimes
ld b, 0
; This routine is buggy. If [wCurHPAnimMaxHP] * [wCurHPBarPixels] is
; divisible by HP_BAR_LENGTH_PX, the loop runs one extra time.
; To fix, uncomment the line below.
.loop
; BUG: HP bar animation off-by-one error for low HP (see docs/bugs_and_glitches.md)
ld a, l
sub HP_BAR_LENGTH_PX
ld l, a
ld a, h
sbc $0
ld h, a
; jr z, .done
jr c, .done
inc b
jr .loop

3
engine/battle/battle_transition.asm
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@ -214,8 +214,7 @@ DEF TRANS_NO_CAVE_F EQU 1 ; bit set in TRANS_NO_CAVE and TRANS_NO_CAVE_STRONGER
StartTrainerBattle_DetermineWhichAnimation:
; The screen flashes a different number of times depending on the level of
; your lead Pokemon relative to the opponent's.
; BUG: wBattleMonLevel and wEnemyMonLevel are not set at this point, so whatever
; values happen to be there will determine the animation.
; BUG: Battle transitions fail to account for enemy's level (see docs/bugs_and_glitches.md)
ld de, 0
ld a, [wBattleMonLevel]
add 3

36
engine/battle/core.asm
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@ -295,6 +295,7 @@ HandleBetweenTurnEffects:
jp HandleEncore
CheckFaint_PlayerThenEnemy:
; BUG: Perish Song and Spikes can leave a Pokemon with 0 HP and not faint (see docs/bugs_and_glitches.md)
call HasPlayerFainted
jr nz, .PlayerNotFainted
call HandlePlayerMonFaint
@ -319,6 +320,7 @@ CheckFaint_PlayerThenEnemy:
ret
CheckFaint_EnemyThenPlayer:
; BUG: Perish Song and Spikes can leave a Pokemon with 0 HP and not faint (see docs/bugs_and_glitches.md)
call HasEnemyFainted
jr nz, .EnemyNotFainted
call HandleEnemyMonFaint
@ -387,6 +389,7 @@ HandleBerserkGene:
call GetPartyLocation
xor a
ld [hl], a
; BUG: Berserk Gene's confusion lasts for 256 turns or the previous Pokémon's confusion count (see docs/bugs_and_glitches.md)
ld a, BATTLE_VARS_SUBSTATUS3
call GetBattleVarAddr
push af
@ -4186,6 +4189,7 @@ PursuitSwitch:
or [hl]
jr nz, .done
; BUG: A Pokémon that fainted from Pursuit will have its old status condition when revived (see docs/bugs_and_glitches.md)
ld a, $f0
ld [wCryTracks], a
ld a, [wBattleMonSpecies]
@ -5759,8 +5763,8 @@ CheckPlayerHasUsableMoves:
jr .loop
.done
; Bug: this will result in a move with PP Up confusing the game.
and a ; should be "and PP_MASK"
; BUG: A Disabled but PP Up–enhanced move may not trigger Struggle (see docs/bugs_and_glitches.md)
and a
ret nz
.force_struggle
@ -6159,13 +6163,14 @@ LoadEnemyMon:
jr nz, .Happiness
; Get Magikarp's length
; BUG: Magikarp length limits have a unit conversion error (see docs/bugs_and_glitches.md)
ld de, wEnemyMonDVs
ld bc, wPlayerID
callfar CalcMagikarpLength
; No reason to keep going if length > 1536 mm (i.e. if HIGH(length) > 6 feet)
ld a, [wMagikarpLength]
cp HIGH(1536) ; should be "cp 5", since 1536 mm = 5'0", but HIGH(1536) = 6
cp HIGH(1536)
jr nz, .CheckMagikarpArea
; 5% chance of skipping both size checks
@ -6174,7 +6179,7 @@ LoadEnemyMon:
jr c, .CheckMagikarpArea
; Try again if length >= 1616 mm (i.e. if LOW(length) >= 4 inches)
ld a, [wMagikarpLength + 1]
cp LOW(1616) ; should be "cp 4", since 1616 mm = 5'4", but LOW(1616) = 80
cp LOW(1616)
jr nc, .GenerateDVs
; 20% chance of skipping this check
@ -6183,23 +6188,11 @@ LoadEnemyMon:
jr c, .CheckMagikarpArea
; Try again if length >= 1600 mm (i.e. if LOW(length) >= 3 inches)
ld a, [wMagikarpLength + 1]
cp LOW(1600) ; should be "cp 3", since 1600 mm = 5'3", but LOW(1600) = 64
cp LOW(1600)
jr nc, .GenerateDVs
.CheckMagikarpArea:
; The "jr z" checks are supposed to be "jr nz".
; Instead, all maps in GROUP_LAKE_OF_RAGE (Mahogany area)
; and Routes 20 and 44 are treated as Lake of Rage.
; This also means Lake of Rage Magikarp can be smaller than ones
; caught elsewhere rather than the other way around.
; Intended behavior enforces a minimum size at Lake of Rage.
; The real behavior prevents a minimum size in the Lake of Rage area.
; Moreover, due to the check not being translated to feet+inches, all Magikarp
; smaller than 4'0" may be caught by the filter, a lot more than intended.
; BUG: Magikarp in Lake of Rage are shorter, not longer (see docs/bugs_and_glitches.md)
ld a, [wMapGroup]
cp GROUP_LAKE_OF_RAGE
jr z, .Happiness
@ -6212,7 +6205,7 @@ LoadEnemyMon:
jr c, .Happiness
; Try again if length < 1024 mm (i.e. if HIGH(length) < 3 feet)
ld a, [wMagikarpLength]
cp HIGH(1024) ; should be "cp 3", since 1024 mm = 3'4", but HIGH(1024) = 4
cp HIGH(1024)
jr c, .GenerateDVs ; try again
; Finally done with DVs
@ -6805,6 +6798,7 @@ BadgeStatBoosts:
ld hl, wBattleMonAttack
ld c, 4
.CheckBadge:
; BUG: Glacier Badge may not boost Special Defense depending on the value of Special Attack (see docs/bugs_and_glitches.md)
ld a, b
srl b
call c, BoostStat
@ -6814,9 +6808,6 @@ BadgeStatBoosts:
srl b
dec c
jr nz, .CheckBadge
; Check GlacierBadge again for Special Defense.
; This check is buggy because it assumes that a is set by the "ld a, b" in the above loop,
; but it can actually be overwritten by the call to BoostStat.
srl a
call c, BoostStat
ret
@ -7637,6 +7628,7 @@ SendOutMonText:
ld hl, GoMonText
jr z, .skip_to_textbox
; BUG: Switching out or switching against a Pokémon with max HP below 4 freezes the game (see docs/bugs_and_glitches.md)
; compute enemy health remaining as a percentage
xor a
ldh [hMultiplicand + 0], a

22
engine/battle/effect_commands.asm
View File

@ -1401,13 +1401,9 @@ BattleCheckTypeMatchup:
and a
jr z, CheckTypeMatchup
ld hl, wBattleMonType1
; fallthrough
CheckTypeMatchup:
; There is an incorrect assumption about this function made in the AI related code: when
; the AI calls CheckTypeMatchup (not BattleCheckTypeMatchup), it assumes that placing the
; offensive type in a will make this function do the right thing. Since a is overwritten,
; this assumption is incorrect. A simple fix would be to load the move type for the
; current move into a in BattleCheckTypeMatchup, before falling through, which is
; consistent with how the rest of the code assumes this code works like.
; BUG: AI makes a false assumption about CheckTypeMatchup (see docs/bugs_and_glitches.md)
push hl
push de
push bc
@ -1865,9 +1861,7 @@ BattleCommand_EffectChance:
jr z, .got_move_chance
ld hl, wEnemyMoveStruct + MOVE_CHANCE
.got_move_chance
; BUG: 1/256 chance to fail even for a 100% effect chance,
; since carry is not set if BattleRandom == [hl] == 255
; BUG: Moves with a 100% secondary effect chance will not trigger it in 1/256 uses (see docs/bugs_and_glitches.md)
call BattleRandom
cp [hl]
pop hl
@ -2089,6 +2083,7 @@ BattleCommand_FailureText:
inc hl
ld a, [hl]
; BUG: Beat Up may fail to raise Substitute (see docs/bugs_and_glitches.md)
cp EFFECT_MULTI_HIT
jr z, .multihit
cp EFFECT_DOUBLE_HIT
@ -2510,6 +2505,7 @@ DittoMetalPowder:
pop bc
ret nz
; BUG: Metal Powder can increase damage taken with boosted (Special) Defense (see docs/bugs_and_glitches.md)
ld a, c
srl a
add c
@ -2646,6 +2642,7 @@ TruncateHL_BC:
inc l
.finish
; BUG: Reflect and Light Screen can make (Special) Defense wrap around above 1024 (see docs/bugs_and_glitches.md)
ld a, [wLinkMode]
cp LINK_COLOSSEUM
jr z, .done
@ -2772,6 +2769,7 @@ SpeciesItemBoost:
ret nz
; Double the stat
; BUG: Thick Club and Light Ball can make (Special) Attack wrap around above 1024 (see docs/bugs_and_glitches.md)
sla l
rl h
ret
@ -2901,8 +2899,7 @@ HitSelfInConfusion:
BattleCommand_DamageCalc:
; Return a damage value for move power d, player level e, enemy defense c and player attack b.
; Return 1 if successful, else 0.
; BUG: Confusion damage is affected by type-boosting items and Explosion/Self-Destruct doubling (see docs/bugs_and_glitches.md)
ld a, BATTLE_VARS_MOVE_EFFECT
call GetBattleVar
@ -5263,6 +5260,7 @@ BattleCommand_EndLoop:
jr .double_hit
.only_one_beatup
; BUG: Beat Up works incorrectly with only one Pokémon in the party (see docs/bugs_and_glitches.md)
ld a, BATTLE_VARS_SUBSTATUS3
call GetBattleVarAddr
res SUBSTATUS_IN_LOOP, [hl]
@ -6546,7 +6544,7 @@ INCLUDE "engine/battle/move_effects/future_sight.asm"
INCLUDE "engine/battle/move_effects/thunder.asm"
CheckHiddenOpponent:
; BUG: This routine is completely redundant and introduces a bug, since BattleCommand_CheckHit does these checks properly.
; BUG: Lock-On and Mind Reader don't always bypass Fly and Dig (see docs/bugs_and_glitches.md)
ld a, BATTLE_VARS_SUBSTATUS3_OPP
call GetBattleVar
and 1 << SUBSTATUS_FLYING | 1 << SUBSTATUS_UNDERGROUND

4
engine/battle/move_effects/beat_up.asm
View File

@ -24,6 +24,7 @@ BattleCommand_BeatUp:
ld [wCurBeatUpPartyMon], a
.got_mon
; BUG: Beat Up can desynchronize link battles (see docs/bugs_and_glitches.md)
ld a, [wCurBeatUpPartyMon]
ld hl, wPartyMonNicknames
call GetNickname
@ -35,8 +36,6 @@ BattleCommand_BeatUp:
ld a, [wCurBeatUpPartyMon]
ld c, a
ld a, [wCurBattleMon]
; BUG: this can desynchronize link battles
; Change "cp [hl]" to "cp c" to fix
cp [hl]
ld hl, wBattleMonStatus
jr z, .active_mon
@ -196,6 +195,7 @@ BattleCommand_BeatUp:
jp SkipToBattleCommand
BattleCommand_BeatUpFailText:
; BUG: Beat Up may trigger King's Rock even if it failed (see docs/bugs_and_glitches.md)
ld a, [wBeatUpHitAtLeastOnce]
and a
ret nz

4
engine/battle/move_effects/belly_drum.asm
View File

@ -1,7 +1,5 @@
BattleCommand_BellyDrum:
; This command is buggy because it raises the user's attack
; before checking that it has enough HP to use the move.
; Swap the order of these two blocks to fix.
; BUG: Belly Drum sharply boosts Attack even with under 50% HP (see docs/bugs_and_glitches.md)
call BattleCommand_AttackUp2
ld a, [wAttackMissed]
and a

2
engine/battle/move_effects/counter.asm
View File

@ -34,7 +34,7 @@ BattleCommand_Counter:
cp SPECIAL
ret nc
; BUG: Move should fail with all non-damaging battle actions
; BUG: Counter and Mirror Coat still work if the opponent uses an item (see docs/bugs_and_glitches.md)
ld hl, wCurDamage
ld a, [hli]
or [hl]

1
engine/battle/move_effects/frustration.asm
View File

@ -1,4 +1,5 @@
BattleCommand_FrustrationPower:
; BUG: Return and Frustration deal no damage when the user's happiness is low or high, respectively (see docs/bugs_and_glitches.md)
push bc
ld hl, wBattleMonHappiness
ldh a, [hBattleTurn]

2
engine/battle/move_effects/mirror_coat.asm
View File

@ -35,7 +35,7 @@ BattleCommand_MirrorCoat:
cp SPECIAL
ret c
; BUG: Move should fail with all non-damaging battle actions
; BUG: Counter and Mirror Coat still work if the opponent uses an item (see docs/bugs_and_glitches.md)
ld hl, wCurDamage
ld a, [hli]
or [hl]

1
engine/battle/move_effects/present.asm
View File

@ -1,4 +1,5 @@
BattleCommand_Present:
; BUG: Present damage is incorrect in link battles (see docs/bugs_and_glitches.md)
ld a, [wLinkMode]
cp LINK_COLOSSEUM
jr z, .colosseum_skippush

1
engine/battle/move_effects/return.asm
View File

@ -1,4 +1,5 @@
BattleCommand_HappinessPower:
; BUG: Return and Frustration deal no damage when the user's happiness is low or high, respectively (see docs/bugs_and_glitches.md)
push bc
ld hl, wBattleMonHappiness
ldh a, [hBattleTurn]

1
engine/battle/move_effects/sketch.asm
View File

@ -12,6 +12,7 @@ BattleCommand_Sketch:
call CheckSubstituteOpp
jp nz, .fail
; If the opponent is transformed, fail.
; BUG: A Transformed Pokémon can use Sketch and learn otherwise unobtainable moves (see docs/bugs_and_glitches.md)
ld a, BATTLE_VARS_SUBSTATUS5_OPP
call GetBattleVarAddr
bit SUBSTATUS_TRANSFORMED, [hl]

3
engine/battle/move_effects/teleport.asm
View File

@ -66,14 +66,13 @@ BattleCommand_Teleport:
inc c
; Generate a number less than c
.loop_enemy
; BUG: Wild Pokémon can always Teleport regardless of level difference (see docs/bugs_and_glitches.md)
call BattleRandom
cp c
jr nc, .loop_enemy
; b = player level / 4
srl b
srl b
; This should be "jr c, .failed"
; As written, it makes enemy use of Teleport always succeed if able
cp b
jr nc, .run_away

2
engine/battle/start_battle.asm
View File

@ -93,7 +93,7 @@ PlayBattleMusic:
cp RED
jr z, .done
; They should have included EXECUTIVEM, EXECUTIVEF, and SCIENTIST too...
; BUG: Team Rocket battle music is not used for Executives or Scientists (see docs/bugs_and_glitches.md)
ld de, MUSIC_ROCKET_BATTLE
cp GRUNTM
jr z, .done

4
engine/battle_anims/anim_commands.asm
View File

@ -653,9 +653,9 @@ BattleAnimCmd_ResetObp0:
ret
BattleAnimCmd_ClearObjs:
; BUG: This function only clears the first 6⅔ objects
; BUG: BattleAnimCmd only clears the first 6⅔ objects (see docs/bugs_and_glitches.md)
ld hl, wActiveAnimObjects
ld a, $a0 ; should be NUM_ANIM_OBJECTS * BATTLEANIMSTRUCT_LENGTH
ld a, $a0
.loop
ld [hl], 0
inc hl

7
engine/events/haircut.asm
View File

@ -37,13 +37,6 @@ HaircutOrGrooming:
call CopyPokemonName_Buffer1_Buffer3
pop hl
call Random
; Bug: Subtracting $ff from $ff fails to set c.
; This can result in overflow into the next data array.
; In the case of getting a grooming from Daisy, we bleed
; into CopyPokemonName_Buffer1_Buffer3, which passes
; $d0 to ChangeHappiness and returns $73 to the script.
; The end result is that there is a 0.4% chance your
; Pokemon's happiness will not change at all.
.loop
sub [hl]
jr c, .ok

3
engine/events/halloffame.asm
View File

@ -363,8 +363,9 @@ _HallOfFamePC:
call ClearBGPalettes
pop hl
call DisplayHOFMon
; BUG: A "HOF Master!" title for 200-Time Famers is defined but inaccessible (see docs/bugs_and_glitches.md)
ld a, [wHallOfFameTempWinCount]
cp HOF_MASTER_COUNT + 1 ; should be HOF_MASTER_COUNT
cp HOF_MASTER_COUNT + 1
jr c, .print_num_hof
ld de, .HOFMaster
hlcoord 1, 2

5
engine/events/magikarp.asm
View File

@ -278,12 +278,11 @@ CalcMagikarpLength:
ret
.BCLessThanDE:
; Intention: Return bc < de.
; Reality: Return b < d.
; BUG: Magikarp lengths can be miscalculated (see docs/bugs_and_glitches.md)
ld a, b
cp d
ret c
ret nc ; whoops
ret nc
ld a, c
cp e
ret

1
engine/events/overworld.asm
View File

@ -400,6 +400,7 @@ SurfFromMenuScript:
special UpdateTimePals
UsedSurfScript:
; BUG: Surfing directly across a map connection does not load the new map (see docs/bugs_and_glitches.md)
writetext UsedSurfText ; "used SURF!"
waitbutton
closetext

3
engine/games/slot_machine.asm
View File

@ -483,12 +483,13 @@ SlotsAction_PayoutAnim:
jr c, .okay
inc de
.okay
; BUG: Slot machine payout sound effects cut each other off (see docs/bugs_and_glitches.md)
ld [hl], e
dec hl
ld [hl], d
ld a, [wSlotsDelay]
and $7
ret z ; ret nz would be more appropriate
ret z
ld de, SFX_GET_COIN_FROM_SLOTS
call PlaySFX
ret

52
engine/items/item_effects.asm
View File

@ -210,6 +210,7 @@ ItemEffects:
; NoEffect would be appropriate, with the table then being NUM_ITEMS long.
PokeBallEffect:
; BUG: The Dude's catching tutorial may crash if his Poké Ball can't be used (see docs/bugs_and_glitches.md)
ld a, [wBattleMode]
dec a
jp nz, UseBallInTrainerBattle
@ -226,6 +227,7 @@ PokeBallEffect:
jp z, Ball_BoxIsFullMessage
.room_in_party
; BUG: Using a Park Ball in non-Contest battles has a corrupt animation (see docs/bugs_and_glitches.md)
xor a
ld [wWildMon], a
ld a, [wCurItem]
@ -334,17 +336,12 @@ PokeBallEffect:
jr nz, .statuscheck
ld a, 1
.statuscheck
; This routine is buggy. It was intended that SLP and FRZ provide a higher
; catch rate than BRN/PSN/PAR, which in turn provide a higher catch rate than
; no status effect at all. But instead, it makes BRN/PSN/PAR provide no
; benefit.
; Uncomment the line below to fix this.
; BUG: BRN/PSN/PAR do not affect catch rate (see docs/bugs_and_glitches.md)
ld b, a
ld a, [wEnemyMonStatus]
and 1 << FRZ | SLP_MASK
ld c, 10
jr nz, .addstatus
; ld a, [wEnemyMonStatus]
and a
ld c, 5
jr nz, .addstatus
@ -356,13 +353,10 @@ PokeBallEffect:
ld a, $ff
.max_1
; BUG: farcall overwrites a, and GetItemHeldEffect takes b anyway.
; This is probably the reason the HELD_CATCH_CHANCE effect is never used.
; Uncomment the line below to fix.
; BUG: HELD_CATCH_CHANCE has no effect (see docs/bugs_and_glitches.md)
ld d, a
push de
ld a, [wBattleMonItem]
; ld b, a
farcall GetItemHeldEffect
ld a, b
cp HELD_CATCH_CHANCE
@ -446,9 +440,7 @@ PokeBallEffect:
push af
set SUBSTATUS_TRANSFORMED, [hl]
; This code is buggy. Any wild Pokémon that has Transformed will be
; caught as a Ditto, even if it was something else like Mew.
; To fix, do not set [wTempEnemyMonSpecies] to DITTO.
; BUG: Catching a Transformed Pokémon always catches a Ditto (see docs/bugs_and_glitches.md)
bit SUBSTATUS_TRANSFORMED, a
jr nz, .ditto
jr .not_ditto
@ -761,13 +753,10 @@ ParkBallMultiplier:
ret
HeavyBall_GetDexEntryBank:
; This function is buggy.
; It gets the wrong bank for Kadabra (64), Tauros (128), and Sunflora (192).
; Uncomment the line below to fix this.
; BUG: Heavy Ball uses wrong weight value for three Pokémon (see docs/bugs_and_glitches.md)
push hl
push de
ld a, [wEnemyMonSpecies]
; dec a
rlca
rlca
maskbits NUM_DEX_ENTRY_BANKS
@ -905,9 +894,6 @@ LureBallMultiplier:
ret
MoonBallMultiplier:
; This function is buggy.
; Intent: multiply catch rate by 4 if mon evolves with moon stone
; Reality: no boost
push bc
ld a, [wTempEnemyMonSpecies]
dec a
@ -931,9 +917,7 @@ MoonBallMultiplier:
inc hl
inc hl
; Moon Stone's constant from Pokémon Red is used.
; No Pokémon evolve with Burn Heal,
; so Moon Balls always have a catch rate of 1×.
; BUG: Moon Ball does not boost catch rate (see docs/bugs_and_glitches.md)
push bc
ld a, BANK("Evolutions and Attacks")
call GetFarByte
@ -951,9 +935,6 @@ MoonBallMultiplier:
ret
LoveBallMultiplier:
; This function is buggy.
; Intent: multiply catch rate by 8 if mons are of same species, different sex
; Reality: multiply catch rate by 8 if mons are of same species, same sex
; does species match?
ld a, [wTempEnemyMonSpecies]
@ -974,9 +955,9 @@ LoveBallMultiplier:
jr c, .done1 ; no effect on genderless
ld d, 0 ; male
jr nz, .playermale
jr nz, .got_player_gender
inc d ; female
.playermale
.got_player_gender
; check wild mon species
push de
@ -988,15 +969,16 @@ LoveBallMultiplier:
jr c, .done2 ; no effect on genderless
ld d, 0 ; male
jr nz, .wildmale
jr nz, .got_wild_gender
inc d ; female
.wildmale
.got_wild_gender
; BUG: Love Ball boosts catch rate for the wrong gender (see docs/bugs_and_glitches.md)
ld a, d
pop de
cp d
pop bc
ret nz ; for the intended effect, this should be "ret z"
ret nz
sla b
jr c, .max
@ -1016,17 +998,13 @@ LoveBallMultiplier:
ret
FastBallMultiplier:
; This function is buggy.
; Intent: multiply catch rate by 4 if enemy mon is in one of the three
; FleeMons tables.
; Reality: multiply catch rate by 4 if enemy mon is one of the first three in
; the first FleeMons table.
ld a, [wTempEnemyMonSpecies]
ld c, a
ld hl, FleeMons
ld d, 3
.loop
; BUG: Fast Ball only boosts catch rate for three Pokémon (see docs/bugs_and_glitches.md)
ld a, BANK(FleeMons)
call GetFarByte
@ -1034,7 +1012,7 @@ FastBallMultiplier:
cp -1
jr z, .next
cp c
jr nz, .next ; for the intended effect, this should be "jr nz, .loop"
jr nz, .next
sla b
jr c, .max

1
engine/movie/credits.asm
View File

@ -76,6 +76,7 @@ Credits::
call GetCreditsPalette
call SetPalettes
; BUG: Credits sequence changes move selection menu behavior (see docs/bugs_and_glitches.md)
ldh a, [hVBlank]
push af
ld a, $5

3
engine/overworld/events.asm
View File

@ -554,7 +554,7 @@ TryObjectEvent:
ld a, [hl]
and %00001111
; Bug: If IsInArray returns nc, data at bc will be executed as code.
; BUG: TryObjectEvent arbitrary code execution (see docs/bugs_and_glitches.md)
push bc
ld de, 3
ld hl, ObjectEventTypeArray
@ -569,7 +569,6 @@ TryObjectEvent:
jp hl
.nope
; pop bc
xor a
ret

2
engine/overworld/map_objects.asm
View File

@ -2689,7 +2689,7 @@ ResetObject:
add hl, bc
ld a, [hl]
cp -1
jp z, .set_standing ; a jr would have been appropriate here
jp z, .set_standing
push bc
call GetMapObject
ld hl, MAPOBJECT_MOVEMENT

4
engine/overworld/npc_movement.asm
View File

@ -4,10 +4,10 @@ CanObjectMoveInDirection:
bit SWIMMING_F, [hl]
jr z, .not_swimming
; BUG: Swimming NPCs aren't limited by their movement radius (see docs/bugs_and_glitches.md)
ld hl, OBJECT_FLAGS1
add hl, bc
bit NOCLIP_TILES_F, [hl] ; lost, uncomment next line to fix
; jr nz, .noclip_tiles
bit NOCLIP_TILES_F, [hl]
push hl
push bc
call WillObjectBumpIntoLand

5
engine/overworld/overworld.asm
View File

@ -346,8 +346,7 @@ AddSpriteGFX:
ret
LoadSpriteGFX:
; Bug: b is not preserved, so it's useless as a next count.
; Uncomment the lines below to fix.
; BUG: LoadSpriteGFX does not limit the capacity of UsedSprites (see docs/bugs_and_glitches.md)
ld hl, wUsedSprites
ld b, SPRITE_GFX_LIST_CAPACITY
@ -366,9 +365,7 @@ LoadSpriteGFX:
ret
.LoadSprite:
; push bc
call GetSprite
; pop bc
ld a, l
ret

8
engine/overworld/player_movement.asm
View File

@ -391,14 +391,9 @@ DoPlayerMovement::
db FACE_UP | FACE_LEFT ; COLL_HOP_UP_LEFT
.CheckWarp:
; Bug: Since no case is made for STANDING here, it will check
; [.EdgeWarps + $ff]. This resolves to $3e.
; This causes wWalkingIntoEdgeWarp to be nonzero when standing on tile $3e,
; making bumps silent.
; BUG: No bump noise if standing on tile $3E (see docs/bugs_and_glitches.md)
ld a, [wWalkingDirection]
; cp STANDING
; jr z, .not_warp
ld e, a
ld d, 0
ld hl, .EdgeWarps
@ -410,7 +405,6 @@ DoPlayerMovement::
ld a, TRUE
ld [wWalkingIntoEdgeWarp], a
ld a, [wWalkingDirection]
; This is in the wrong place.
cp STANDING
jr z, .not_warp

6
engine/overworld/scripting.asm
View File

@ -1240,11 +1240,7 @@ Script_memcall:
; fallthrough
ScriptCall:
; Bug: The script stack has a capacity of 5 scripts, yet there is
; nothing to stop you from pushing a sixth script. The high part
; of the script address can then be overwritten by modifications
; to wScriptDelay, causing the script to return to the rst/interrupt
; space.
; BUG: ScriptCall can overflow wScriptStack and crash (see docs/bugs_and_glitches.md)
push de
ld hl, wScriptStackSize

4
engine/overworld/wildmons.asm
View File

@ -313,14 +313,14 @@ ChooseWildEncounter:
inc b
; Store the level
.ok
; BUG: ChooseWildEncounter doesn't really validate the wild Pokemon species (see docs/bugs_and_glitches.md)
ld a, b
ld [wCurPartyLevel], a
ld b, [hl]
; ld a, b
call ValidateTempWildMonSpecies
jr c, .nowildbattle
ld a, b ; This is in the wrong place.
ld a, b
cp UNOWN
jr nz, .done

1
engine/phone/phone.asm
View File

@ -498,6 +498,7 @@ PhoneCall::
ld [hl], "☎"
inc hl
inc hl
; BUG: The unused phonecall script command may crash (see docs/bugs_and_glitches.md)
ld a, [wPhoneScriptBank]
ld b, a
ld a, [wPhoneCaller]

1
engine/pokedex/pokedex.asm
View File

@ -465,6 +465,7 @@ DexEntryScreen_MenuActionJumptable:
ret
.Cry:
; BUG: Playing Entei's Pokédex cry can distort Raikou's and Suicune's (see docs/bugs_and_glitches.md)
call Pokedex_GetSelectedMon
ld a, [wTempSpecies]
call GetCryIndex

1
engine/pokemon/breeding.asm
View File

@ -620,6 +620,7 @@ GetBreedmonMovePointer:
ret
GetEggFrontpic:
; BUG: A hatching Unown egg would not show the right letter (see docs/bugs_and_glitches.md)
push de
ld [wCurPartySpecies], a
ld [wCurSpecies], a

1
engine/pokemon/experience.asm
View File

@ -32,6 +32,7 @@ CalcLevel:
CalcExpAtLevel:
; (a/b)*n**3 + c*n**2 + d*n - e
; BUG: Experience underflow for level 1 Pokémon with Medium-Slow growth rate (see docs/bugs_and_glitches.md)
ld a, [wBaseGrowthRate]
add a
add a

1
engine/pokemon/move_mon.asm
View File

@ -879,6 +879,7 @@ RetrieveBreedmon:
ld a, TRUE
ld [wSkipMovesBeforeLevelUp], a
predef FillMoves
; BUG: Pokémon deposited in the Day-Care might lose experience (see docs/bugs_and_glitches.md)
ld a, [wPartyCount]
dec a
ld [wCurPartyMon], a

2
engine/pokemon/party_menu.asm
View File

@ -385,6 +385,7 @@ PlacePartyMonEvoStoneCompatibility:
ret
.DetermineCompatibility:
; BUG: Only the first three evolution entries can have Stone compatibility reported correctly (see docs/bugs_and_glitches.md)
ld de, wStringBuffer1
ld a, BANK(EvosAttacksPointers)
ld bc, 2
@ -399,6 +400,7 @@ PlacePartyMonEvoStoneCompatibility:
call FarCopyBytes
ld hl, wStringBuffer1
.loop2
; BUG: EVOLVE_STAT can break Stone compatibility reporting (see docs/bugs_and_glitches.md)
ld a, [hli]
and a
jr z, .nope

4
engine/pokemon/search_owned.asm
View File

@ -56,6 +56,7 @@ CheckOwnMonAnywhere:
and a
ret z
; BUG: CheckOwnMon does not check the Day-Care (see docs/bugs_and_glitches.md)
ld d, a
ld e, 0
ld hl, wPartyMon1Species
@ -221,7 +222,8 @@ CheckOwnMon:
ld hl, wPlayerName
rept NAME_LENGTH_JAPANESE - 2 ; should be PLAYER_NAME_LENGTH - 2
; BUG: CheckOwnMon only checks the first five letters of OT names (see docs/bugs_and_glitches.md)
rept NAME_LENGTH_JAPANESE - 2
ld a, [de]
cp [hl]
jr nz, .notfound

3
home/init.asm
View File

@ -186,6 +186,7 @@ ClearVRAM::
ClearWRAM::
; Wipe swappable WRAM banks (1-7)
; Assumes CGB or AGB
; BUG: ClearWRAM only clears WRAM bank 1 (see docs/bugs_and_glitches.md)
ld a, 1
.bank_loop
@ -198,7 +199,7 @@ ClearWRAM::
pop af
inc a
cp 8
jr nc, .bank_loop ; Should be jr c
jr nc, .bank_loop
ret
ClearsScratch::

12
home/map.asm
View File

@ -146,12 +146,10 @@ LoadMetatiles::
ld e, l
ld d, h
; Set hl to the address of the current metatile data ([wTilesetBlocksAddress] + (a) tiles).
; This is buggy; it wraps around past 128 blocks.
; To fix, uncomment the line below.
add a ; Comment or delete this line to fix the above bug.
; BUG: LoadMetatiles wraps around past 128 blocks (see docs/bugs_and_glitches.md)
add a
ld l, a
ld h, 0
; add hl, hl
add hl, hl
add hl, hl
add hl, hl
@ -584,18 +582,16 @@ ReadObjectEvents::
call CopyMapObjectEvents
; get NUM_OBJECTS - [wCurMapObjectEventCount]
; BUG: ReadObjectEvents overflows into wObjectMasks (see docs/bugs_and_glitches.md)
ld a, [wCurMapObjectEventCount]
ld c, a
ld a, NUM_OBJECTS ; - 1
ld a, NUM_OBJECTS
sub c
jr z, .skip
; jr c, .skip
; could have done "inc hl" instead
ld bc, 1
add hl, bc
; Fill the remaining sprite IDs and y coords with 0 and -1, respectively.
; Bleeds into wObjectMasks due to a bug. Uncomment the above code to fix.
ld bc, MAPOBJECT_LENGTH
.loop
ld [hl], 0

1
maps/DragonsDenB1F.asm
View File

@ -41,6 +41,7 @@ DragonsDenB1F_MapScripts:
endcallback
DragonsDenB1F_ClairScene:
; BUG: Clair can give TM24 Dragonbreath twice (see docs/bugs_and_glitches.md)
appear DRAGONSDENB1F_CLAIR
opentext
writetext ClairText_Wait