Files
gen1recomp/docs/known-differences.md
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bryanthaboi 15029d811f bug squashing
# Closed issues

CLOSES #17: Incorrect Character Visuals (Only with GBC filter)
CLOSES #23: Could you allow the player to change the order of the moves
CLOSES #24: Evolution music not playing during evolution
CLOSES #26: Standing on door glitch
CLOSES #27: Battle Intro text automatically continues
CLOSES #29: Visual bug when zoomed out
CLOSES #32: Team Rocket recruiter doesn't battle with you unless you speak with him first
CLOSES #33: Developer/Debug Console
CLOSES #35: Professor Oak's introduction Inaccuracies
CLOSES #36: Missing Pokemon Dex entries when picking starter + Rival Pathing issues
CLOSES #39: Guy who stops player from skipping brock doesn't bring you to brock's gym + doesn't leave once you've beaten brock
CLOSES #40: Bill cutscene is broken
CLOSES #41: Ticket guy failing to be a Ticket guy
CLOSES #42: S.S. anne odd behavior + Missing sailing away animation
CLOSES #43: Dig Attack animation appears to be glitched
CLOSES #44: Pokeball flashing doesn't appear to be accurate
CLOSES #45: Inaccurate Cut Animation
CLOSES #46: Dugtrio i caught in diglett cave has two of the same move
CLOSES #47: Rival ignores player in Lavender Tower
CLOSES #48: Healing pad in lavender tower does not function
CLOSES #49: Incorrect dialogue with parched security guard
CLOSES #50: (Game Breaking!) Rocket grunt guarding poster refuses to move
CLOSES #51: Badges showing up as items I can deposit in PC
CLOSES #52: Visual bug on Celadon Department Store roof (Red Filter)
CLOSES #54: Visual issue on route 15 + Fuchsia City
CLOSES #56: Running animation missing
CLOSES #57: Safari Zone does not display steps while you are inside of it
CLOSES #58: (Game Breaking!) Softlock at cycling road gate
CLOSES #59: Bike visual issues
CLOSES #60: Cycling road not forcing you to get on your bike
CLOSES #61: No keycard doors in Silph Co.
CLOSES #63: Missing teleporter animation
CLOSES #64: Inaccurate spinning
CLOSES #65: Reimplement unused Silph Co. Chief and Professor Oak trainer battles
2026-07-22 08:18:13 -04:00

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# Known differences from the original game
Only genuine remaining divergences live here: behavior that is still
**missing, wrong, or approximated for convenience** and would need more
work for true parity. Faithfully-ported behavior is documented in
docs/behavior-porting-notes.md; deliberate additions beyond the original
are in docs/new-features.md.
## Reimplemented unused Prof. Oak and Rocket Chief battles
The original ROM defines trainer data for `PROF_OAK` and `CHIEF`
(`data/trainers/parties.asm`) but never attaches either to an NPC, so
both battles are unreachable in the real game. This project makes them
fightable after the Hall of Fame:
- Prof. Oak battles you in Pallet Town once `EVENT_BEAT_CHAMPION_RIVAL`
is set, using `ProfOakData`'s three starter-matched teams (the team is
picked by the type that counters your starter, mirroring the rival).
- The Celadon Game Corner Chief battles you in his house post-game.
`ChiefData` is empty in the ROM, so `OPP_CHIEF` is given a
reconstructed party.
This is an intentional divergence: neither battle can be triggered in the
original game.
## Reimplemented unused Silph Co. card-key doors
`engine/events/card_key.asm` and the unused `CardKeyTable1/2/3` coordinate
lists (`data/events/card_key_coords.asm`) describe locked doors for Silph
Co. floors 2F-11F, but no retail `.blk` map layout ever places the closed
door block at those coordinates, so the card key check is dead code in
the original game. This project stamps the closed door block (`$54`/`$5f`
on floors 2F-10F, `$20` on 11F) over each of the 20 door coordinates on
map load, and swaps it for the open block once that door's
`EVENT_SILPH_CO_n_UNLOCKED_DOORn` flag is set (using the key from a Team
Rocket grunt, as in the original's unused design).
This is an intentional divergence: the doors are not visible or
functional in the original game. The door layout lives in
`tools/rom_manifest.json` (`field.cardKeyDoors.closedDoors`), hand-ported
since no retail ROM data encodes it; `src/import/RomExtractor.lua` copies
it straight through on ROM import.