Document two more bugs found by Crystal_

This commit is contained in:
Remy Oukaour 2017-12-14 16:28:16 -05:00
parent b17db9b8b5
commit c5d482df20
3 changed files with 209 additions and 134 deletions

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@ -3191,6 +3191,8 @@ BattleCommand_BeatUp: ; 35461
ld a, [wd002]
ld c, a
ld a, [CurBattleMon]
; BUG: this can desynchronize link battles
; Change "cp [hl]" to "cp c" to fix
cp [hl]
ld hl, BattleMonStatus
jr z, .active_mon

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@ -571,7 +571,7 @@ DefenseDownHit:
supereffectivetext
checkdestinybond
buildopponentrage
effectchance
effectchance ; bug: duplicate effectchance shouldn't be here
defensedown
statdownmessage
endmove

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@ -6,16 +6,18 @@
- [Thick Club and Light Ball can decrease damage done with boosted (Special) Attack](#thick-club-and-light-ball-can-decrease-damage-done-with-boosted-special-attack)
- [Metal Powder can increase damage taken with boosted (Special) Defense](#metal-powder-can-increase-damage-taken-with-boosted-special-defense)
- [Belly Drum sharply boosts Attack even with under 50% HP](#belly-drum-sharply-boosts-attack-even-with-under-50-hp)
- [Moves that lower Defense can do so after breaking a Substitute](#moves-that-lower-defense-can-do-so-after-breaking-a-substitute)
- [Counter and Mirror Coat still work if the opponent uses an item](#counter-and-mirror-coat-still-work-if-the-opponent-uses-an-item)
- [A Disabled but PP Upenhanced move may not trigger Struggle](#a-disabled-but-pp-upenhanced-move-may-not-trigger-struggle)
- [A Pokémon that fainted from Pursuit will have its old status condition when revived](#a-pokémon-that-fainted-from-pursuit-will-have-its-old-status-condition-when-revived)
- [Beat Up can desynchronize link battles](#beat-up-can-desynchronize-link-battles)
- [Present damage is incorrect in link battles](#present-damage-is-incorrect-in-link-battles)
- ["Smart" AI encourages Mean Look if its own Pokémon is badly poisoned](#smart-ai-encourages-mean-look-if-its-own-pokémon-is-badly-poisoned)
- [NPC use of Full Heal or Full Restore does not cure Nightmare status](#npc-use-of-full-heal-or-full-restore-does-not-cure-nightmare-status)
- [HP bar animation is slow for high HP](#hp-bar-animation-is-slow-for-high-hp)
- [HP bar animation off-by-one error for low HP](#hp-bar-animation-off-by-one-error-for-low-hp)
- [Experience underflow for level 1 Pokémon with Medium-Slow growth rate](#experience-underflow-for-level-1-pokémon-with-medium-slow-growth-rate)
- [Five-digit experience gain is printed incorrectly](#five-digit-experience-gain-is-printed-incorrectly)
- [NPC use of Full Heal or Full Restore does not cure Nightmare status](#npc-use-of-full-heal-or-full-restore-does-not-cure-nightmare-status)
- ["Smart" AI encourages Mean Look if its own Pokémon is badly poisoned](#smart-ai-encourages-mean-look-if-its-own-pokémon-is-badly-poisoned)
- [A Disabled, PP Upenhanced move may not trigger automatic Struggling](#a-disabled-pp-upenhanced-move-may-not-trigger-automatic-struggling)
- [Counter and Mirror Coat still work if the opponent uses an item](#counter-and-mirror-coat-still-work-if-the-opponent-uses-an-item)
- [A Pokémon that fainted from Pursuit will have its old status condition when revived](#a-pokémon-that-fainted-from-pursuit-will-have-its-old-status-condition-when-revived)
- [Present damage is incorrect in link battles](#present-damage-is-incorrect-in-link-battles)
- [BRN/PSN/PAR do not affect catch rate](#brnpsnpar-do-not-affect-catch-rate)
- [Moon Ball does not boost catch rate](#moon-ball-does-not-boost-catch-rate)
- [Love Ball boosts catch rate for the wrong gender](#love-ball-boosts-catch-rate-for-the-wrong-gender)
@ -171,6 +173,204 @@ BattleCommand_BellyDrum: ; 37c1a
```
## Moves that lower Defense can do so after breaking a Substitute
([Video](https://www.youtube.com/watch?v=OGwKPRJLaaI))
This bug affects Acid, Iron Tail, and Rock Smash.
This is a bug with `DefenseDownHit` in [battle/moves/move_effects.asm](battle/moves/move_effects.asm):
```asm
DefenseDownHit:
checkobedience
usedmovetext
doturn
critical
damagestats
damagecalc
stab
damagevariation
checkhit
effectchance
hittarget
failuretext
checkfaint
criticaltext
supereffectivetext
checkdestinybond
buildopponentrage
effectchance ; bug: duplicate effectchance shouldn't be here
defensedown
statdownmessage
endmove
```
**Fix:** Delete the second `effectchance`.
## Counter and Mirror Coat still work if the opponent uses an item
([Video](https://www.youtube.com/watch?v=uRYyzKRatFk))
*To do:* Identify specific code causing this bug and fix it.
## A Disabled but PP Upenhanced move may not trigger Struggle
([Video](https://www.youtube.com/watch?v=1v9x4SgMggs))
This is a bug with `CheckPlayerHasUsableMoves` in [battle/core.asm](battle/core.asm):
```asm
.done
; Bug: this will result in a move with PP Up confusing the game.
; Replace with "and $3f" to fix.
and a
ret nz
.force_struggle
ld hl, BattleText_PkmnHasNoMovesLeft
call StdBattleTextBox
ld c, 60
call DelayFrames
xor a
ret
```
**Fix:** Change `and a` to `and $3f`.
## A Pokémon that fainted from Pursuit will have its old status condition when revived
([Video](https://www.youtube.com/watch?v=tiRvw-Nb2ME))
*To do:* Identify specific code causing this bug and fix it.
## Beat Up can desynchronize link battles
([Video](https://www.youtube.com/watch?v=202-iAsrIa8))
This is a bug with `BattleCommand_BeatUp` in [battle/effect_commands.asm](battle/effect_commands.asm):
```asm
.got_mon
ld a, [wd002]
ld hl, PartyMonNicknames
call GetNick
ld a, MON_HP
call GetBeatupMonLocation
ld a, [hli]
or [hl]
jp z, .beatup_fail ; fainted
ld a, [wd002]
ld c, a
ld a, [CurBattleMon]
; BUG: this can desynchronize link battles
; Change "cp [hl]" to "cp c" to fix
cp [hl]
ld hl, BattleMonStatus
jr z, .active_mon
ld a, MON_STATUS
call GetBeatupMonLocation
.active_mon
ld a, [hl]
and a
jp nz, .beatup_fail
```
**Fix:** Change `cp [hl]` to `cp c`.
## Present damage is incorrect in link battles
([Video](https://www.youtube.com/watch?v=XJaQoKtrEuw))
This bug existed for all battles in Gold and Silver, and was only fixed for single-player battles in Crystal to preserve link compatibility.
This is a bug with `BattleCommand_Present` in [battle/effects/present.asm](battle/effects/present.asm):
```asm
BattleCommand_Present: ; 37874
; present
ld a, [wLinkMode]
cp LINK_COLOSSEUM
jr z, .colosseum_skippush
push bc
push de
.colosseum_skippush
call BattleCommand_Stab
ld a, [wLinkMode]
cp LINK_COLOSSEUM
jr z, .colosseum_skippop
pop de
pop bc
.colosseum_skippop
```
**Fix:**
```asm
BattleCommand_Present: ; 37874
; present
push bc
push de
call BattleCommand_Stab
pop de
pop bc
```
## "Smart" AI encourages Mean Look if its own Pokémon is badly poisoned
([Video](https://www.youtube.com/watch?v=cygMO-zHTls))
This is a bug with `AI_Smart_MeanLook` in [battle/ai/scoring.asm](battle/ai/scoring.asm):
```asm
; 80% chance to greatly encourage this move if the enemy is badly poisoned (buggy).
; Should check PlayerSubStatus5 instead.
ld a, [EnemySubStatus5]
bit SUBSTATUS_TOXIC, a
jr nz, .asm_38e26
```
**Fix:** Change `EnemySubStatus5` to `PlayerSubStatus5`.
## NPC use of Full Heal or Full Restore does not cure Nightmare status
([Video](https://www.youtube.com/watch?v=rGqu3d3pdok&t=322))
This is a bug with `AI_HealStatus` in [battle/ai/items.asm](battle/ai/items.asm):
```asm
AI_HealStatus: ; 384e0
ld a, [CurOTMon]
ld hl, OTPartyMon1Status
ld bc, PARTYMON_STRUCT_LENGTH
call AddNTimes
xor a
ld [hl], a
ld [EnemyMonStatus], a
; Bug: this should reset SUBSTATUS_NIGHTMARE too
; Uncomment the lines below to fix
; ld hl, EnemySubStatus1
; res SUBSTATUS_NIGHTMARE, [hl]
ld hl, EnemySubStatus5
res SUBSTATUS_TOXIC, [hl]
ret
; 384f7
```
**Fix:** Uncomment `ld hl, EnemySubStatus1` and `res SUBSTATUS_NIGHTMARE, [hl]`.
## HP bar animation is slow for high HP
([Video](https://www.youtube.com/watch?v=SE-BfsFgZVM))
@ -299,133 +499,6 @@ Text_StringBuffer2ExpPoints::
**Fix:** Change both `deciram StringBuffer2, 2, 4` to `deciram StringBuffer2, 2, 5`.
## NPC use of Full Heal or Full Restore does not cure Nightmare status
([Video](https://www.youtube.com/watch?v=rGqu3d3pdok&t=322))
This is a bug with `AI_HealStatus` in [battle/ai/items.asm](battle/ai/items.asm):
```asm
AI_HealStatus: ; 384e0
ld a, [CurOTMon]
ld hl, OTPartyMon1Status
ld bc, PARTYMON_STRUCT_LENGTH
call AddNTimes
xor a
ld [hl], a
ld [EnemyMonStatus], a
; Bug: this should reset SUBSTATUS_NIGHTMARE too
; Uncomment the lines below to fix
; ld hl, EnemySubStatus1
; res SUBSTATUS_NIGHTMARE, [hl]
ld hl, EnemySubStatus5
res SUBSTATUS_TOXIC, [hl]
ret
; 384f7
```
**Fix:** Uncomment `ld hl, EnemySubStatus1` and `res SUBSTATUS_NIGHTMARE, [hl]`.
## "Smart" AI encourages Mean Look if its own Pokémon is badly poisoned
([Video](https://www.youtube.com/watch?v=cygMO-zHTls))
This is a bug with `AI_Smart_MeanLook` in [battle/ai/scoring.asm](battle/ai/scoring.asm):
```asm
; 80% chance to greatly encourage this move if the enemy is badly poisoned (buggy).
; Should check PlayerSubStatus5 instead.
ld a, [EnemySubStatus5]
bit SUBSTATUS_TOXIC, a
jr nz, .asm_38e26
```
**Fix:** Change `EnemySubStatus5` to `PlayerSubStatus5`.
## A Disabled, PP Upenhanced move may not trigger automatic Struggling
([Video](https://www.youtube.com/watch?v=1v9x4SgMggs))
This is a bug with `CheckPlayerHasUsableMoves` in [battle/core.asm](battle/core.asm):
```asm
.done
; Bug: this will result in a move with PP Up confusing the game.
; Replace with "and $3f" to fix.
and a
ret nz
.force_struggle
ld hl, BattleText_PkmnHasNoMovesLeft
call StdBattleTextBox
ld c, 60
call DelayFrames
xor a
ret
```
**Fix:** Change `and a` to `and $3f`.
## Counter and Mirror Coat still work if the opponent uses an item
([Video](https://www.youtube.com/watch?v=uRYyzKRatFk))
*To do:* Identify specific code causing this bug and fix it.
## A Pokémon that fainted from Pursuit will have its old status condition when revived
([Video](https://www.youtube.com/watch?v=tiRvw-Nb2ME))
*To do:* Identify specific code causing this bug and fix it.
## Present damage is incorrect in link battles
([Video](https://www.youtube.com/watch?v=XJaQoKtrEuw))
This bug existed for all battles in Gold and Silver, and was only fixed for single-player battles in Crystal to preserve link compatibility.
This is a bug with `BattleCommand_Present` in [battle/effects/present.asm](battle/effects/present.asm):
```asm
BattleCommand_Present: ; 37874
; present
ld a, [wLinkMode]
cp LINK_COLOSSEUM
jr z, .colosseum_skippush
push bc
push de
.colosseum_skippush
call BattleCommand_Stab
ld a, [wLinkMode]
cp LINK_COLOSSEUM
jr z, .colosseum_skippop
pop de
pop bc
.colosseum_skippop
```
**Fix:**
```asm
BattleCommand_Present: ; 37874
; present
push bc
push de
call BattleCommand_Stab
pop de
pop bc
```
## BRN/PSN/PAR do not affect catch rate
This is a bug with `PokeBall` in [items/item_effects.asm](items/item_effects.asm):