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Pokémon FireRed and LeafGreen

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This page contains changes which are not marked for translation.


Title Screen

Pokémon FireRed and LeafGreen

Also known as: Pokémon Version Rouge-Feu et Vert-Feuille (FR), Pokémon Feuerrote Edition und Blattgrüne Edition (DE), Pokémon Edición Rojo Fuego y Edición Verde Hoja (ES), Pokémon Versione Rosso Fuoco e Versione Verde Foglia (IT), Pocket Monsters FireRed and LeafGreen (JP/KR)
Developer: Game Freak
Publisher: Nintendo
Platform: Game Boy Advance
Released in JP: January 28, 2004
Released in US: September 9, 2004
Released in EU: October 1, 2004
Released in AU: September 23, 2004


AreasIcon.png This game has unused areas.
CodeIcon.png This game has unused code.
DevTextIcon.png This game has hidden development-related text.
GraphicsIcon.png This game has unused graphics.
ItemsIcon.png This game has unused items.
TextIcon.png This game has unused text.
SoundtestIcon.png This game has a hidden sound test.
RegionIcon.png This game has regional differences.
Carts.png This game has revisional differences.


ProtoIcon.png This game has a prototype article
PrereleaseIcon.png This game has a prerelease article

Careful, you'll lose an eye.
This page or section needs more images.
There's a whole lotta words here, but not enough pictures. Please fix this.

Pokémon FireRed and LeafGreen are remakes of the first two Pokémon games, Red and Green. Aside from the graphics and interface being upgraded to that of Ruby and Sapphire, the games received many new elements, most notably the Sevii Islands.

Hmmm...
To do:
  • There may be more unused or normally-unseen text. A text dump can be found here.
  • Apparently, the Japanese version has an unused spin trade function [1].
  • Document ROMs from the September 30, 2020 leak, especially the Wireless Union Room ones (there are also three late Japanese prototypes)

Sub-Pages

Read about prototype versions of this game that have been released or dumped.
Prototype Info
Read about prerelease information and/or media for this game.
Prerelease Info
TextIcon.png
Untranslated Text Dump
Text found within the game that wasn't translated, including some leftovers from Ruby and Sapphire.
RegionIcon.png
Regional Differences
A few more changes this time around.

Debugging Functionality

Hmmm...
To do:
Search for more.

Sound Check

Sound Check

At least Japanese FireRed v1.0 has the Sound Check like Ruby and Sapphire, except it was removed in localizations this time around.

To access it, patch 0x12f342 to 00 00 00 00 and 0x12f35c to 01 FF 09 08 in a Japanese FireRed v1.0 ROM to replace the New Game entry on the main menu with a call to Sound Check (this has the effect of running Sound Check after the title screen if there is no save file).

The misspelling of the word "stereo" in the Driver Test from Ruby and Sapphire was fixed in the equivalent of FireRed and LeafGreen as well as of Emerald, being now correctly spelled in katakana (ステレオ) instead of hiragana (すてれお), and the entry itself was also moved to the bottom.

Unused Maps

Houses

  • 18.1, 27.0, and 29.0 are three identical unused houses without event data on Routes 6, 19, and 23 respectively. The one on 19 is where the Pikachu's Beach minigame was in Yellow, so it is possible that they wanted to remake it as well.
  • 31.1 is the room hidden behind boxes in the old lady's house on Seven Island. It only has a warp to the room above.
  • 31.5 is an unused house map for Seven Island that lacks event data. It's possible that this could have housed an NPC who would check how big a certain Pokémon is due to the poster on the wall.

Sevii Islands 8, 9, 22-24

Sevii Isle 8.
Sevii Isle 9.

There is data in the game for Sevii Islands 8, 9, 22, 23, and 24, as well as what are probably early versions of 6 and 7. Interestingly, all of their names have a different syntax than the final islands (ex. Island Eight is called Sevii Island 8 rather than Eight Island.)

  • The early 6 and 7 are blank and only one tile big. Expanding the map size reveals one tile each of their original map intact, with collision data to boot; 6 has a Surfable sea tile, and 7 has the impassible upper-left corner of a sea border rock. This implies that these were fully collisioned maps at some point, but they were "deleted" in the laziest way possible.
  • 8 and 9 still have intact maps with collision data, though they are obviously incomplete.
  • 22, 23, and 24 do not have maps, only headers. They were probably cut early on in development.

Unseen Areas

Hmmm...
To do:
Evaluate Bulbapedia's picture of the overworld of Diglett's Cave with much more space than what can be seen in-game, just like the area around Trainer Tower here presented.
The vast ocean.
The truck.
  • The area around Trainer Tower on Seven Island has a lot more ocean than what's visible in-game. Its meaning is anyone's guess.
  • The infamous truck near the S.S. Anne is present. While the original glitch of blacking out after getting HM01 from the Captain (most commonly by losing to the rival fight) to prevent the S.S. Anne from leaving has been patched in this remake, it is still possible to trade in a Pokémon that knows Cut to avoid entering the S.S. Anne at all and coming back later with Surf. If the player fights their rival in the Pokémon Tower prior to returning, they will no longer be present in the S.S. Anne. Checking out the truck awards a Lava Cookie, an item accessible much earlier than normal.

Additional Maps

Several other maps, some of which are corrupted leftovers from Ruby and Sapphire, also exist in the game's coding. Some of these seem to be early versions of other maps in FireRed and LeafGreen, too garbled to identify, or just duplicates. A complete list can be seen on Bulbapedia here.

Ruby and Sapphire Leftovers

Key Items

Since key items cannot be transferred with a Pokémon, they're unused and most have no effect in FireRed/LeafGreen. The Mach Bike and Acro Bike do work, but act like the normal Bicycle. HM08 (Dive) also works and can be taught to Pokémon, but unlike normal HMs the move can be deleted freely.

Base Decorations

Every secret base decoration and its associated data remains unused within FireRed and LeafGreen; descriptions for these items also remain.

Trainer Sprites

A lot: Archie and Team Aqua, Maxie and Team Magma, Beauties, Cyclists, Hex Maniacs, Gym Leaders, the Elite Four and Champion, etc. While you can battle them in-game through hacking, their Pokémon data is gone, so they don't have any Pokémon to battle with.

Additionally, the backsprites of Brendan and May in battle with their send-out animations remain in the game, only able to be seen in normal gameplay by partnering with a player using Ruby, Sapphire, or Emerald in a four-player link Multi Battle.

Weather

Most overworld weather goes unused, except for regular fog.

Since rain no longer occurs naturally, the related battle message is now unused.

Japanese English
あめが ふっている
It is raining.

Scripts

Multiple scripts starting at 0x1638EC in the US 1.0 version remain as leftovers from the first Braille chamber, with the alphabet inscribed in groups of three (ABC, DEF, GHI ...). A room similar to it was likely planned but then scrapped in favor of having a Braille table included in the booklet.

Dive Script

Starting at 0x1BE38B in the US 1.0 Version is the script for checking and prompting the player to use Dive leftover from Pokémon Ruby and Sapphire, along with the behavior byte used for dive tiles.

Music and Sound Effects

Hmmm...
To do:
Confirm that the PokéNav and Contest effects are in fact unused and not repurposed.

SE-TRACK-MOVE (sound effect 2B)

SE-TRACK-STOP (sound effect 2C)

SE-TRACK-HAIKI (sound effect 2D)

SE-TRACK-DOOR (sound effect 2E)

MUS-ME-KINOMI (music 106), used for Berry picking from trees.

Unseen Text

While not technically unused, this text requires cheating to be seen. If the player interacts with the TV on the ground floor of their house from the sides or back, the same text string from Pokémon Red and Blue appears.

Oops, wrong side...
WrongSide.png

When the player attempts to use an item when they do not have any Pokémon, a normally unseen text string appears, returning from Pokémon Ruby and Sapphire.

There is no POKéMON.
NoPokemon.png

Unused Sprites

Pokémon FireRed and LeafGreen Bug-type TM.png

Hacking a TM move to be Bug-type will cause the disc in the TM case to change color accordingly, possibly suggesting that Bug-type TMs were originally planned to appear in Generation III (though it's a bright shade of yellow, rather than green as it is in later games). Colors for nonexistent HM types also exist, though ???-type has no color and defaults to Normal-type.

Unused Overworld Sprites

Pokémon

These Pokémon overworld sprites are never used in-game.

Sprite Pokémon
PKMN FRLG Mew.PNG Mew
PKMN FRLG Raikou.PNG Raikou
PKMN FRLG Entei.PNG Entei
PKMN FRLG Suicune.PNG Suicune
PKMN FRLG Celebi.PNG Celebi
PKMN FRLG Deoxys-A.PNG Deoxys (Attack forme)
PKMN FRLG Deoxys-D.PNG Deoxys (Defense forme)

Surfing

Hmmm...
To do:
Keitaro posted this on the Jul forums. Investigate and document this further.

PKMN FRLG UnusedOWSurf Spriteset.png There are unused sprites for the player surfing that use a Lapras-like blob instead of the generic blob that ended up being used in the final release.

Male Player sprites

PFRLG-Unused Spritesred.png Within the male player's sprite sheet there are unused sprites of the player character facing diagonally holding rod-like objects. Possibly a unique animation for using the Itemfinder.

Unused Music

A chiptune-like version of the MUS-ME-ASA (music 0100), the "Pokémon Healed" theme, which sounds like the original from Red and Blue. It has the label MUS-KAIHUKU in Sound Check and its ID is 0119.

Shiny Celebi

Pokemon Ruby Sapphire Shiny Celebi.png

For the sake of consistency, every Pokémon in every game is given a Shiny variant, and Celebi is no exception. However, because the only way to obtain it legitimately was through distributions, the Shiny version of Celebi was left unobtainable through normal means. This sprite may still be seen (in a lighter hue) if a Shiny Pokémon Transforms into a Celebi.

Like "standard" Celebi and many other Pokémon, the sprite is identical to that of Ruby and Sapphire, where it was similarly unobtainable.

Altering Cave

Mareep, Aipom, Pineco, Shuckle, Teddiursa, Houndour, Stantler, and Smeargle were meant to replace the Zubat found in Altering Cave after using Mystery Gift. The event distribution was probably scrapped because these Pokémon can be obtained from Pokémon Colosseum or Pokémon XD: Gale of Darkness, as well as in Emerald on the extended area of the Safari Zone (except Smeargle, which is found in Artisan Cave instead) - despite the fact Emerald also has an Altering Cave with the same design and (lack of) implementation.

Technically, this is implemented by its map script reading a numerical variable and selecting from one of 10 encounter tables (all of which specify only 1 Pokémon).

The game does contain a built-in implementation of an Altering Cave event, which attaches to the deliveryman in the top floor of the Pokémon Center and sequentially switches the selected Pokémon then displays:

Thank you for using the MYSTERY
GIFT System.

Recently, there have been rumors
of rare POKéMON appearances.

The rumors are about ALTERING
CAVE on OUTCAST ISLAND.

Why not visit there and check if
the rumors are indeed true?

This however may not necessarily be indicative of how an official event would have worked.

Unused Held Items

Some Pokémon, when found in the wild, have a chance of holding an item. But some of the Pokémon that have assigned held item data can only obtained via evolution or other means, so their potential held items are never seen during normal gameplay. Notably, Kanto and Johto Pokémon in FireRed/LeafGreen use a different list for held items then what Ruby, Sapphire, and Emerald use, as well as all future games.

# Pokémon Held Items Notes
012 Butterfree (5%) Silver Powder
015 Beedrill (5%) Poison Barb
024 Arbok (5%) Poison Barb Available in FireRed.
027 Sandslash (5%) Soft Sand Available in LeafGreen.
036 Clefable (5%) Moon Stone In Ruby/Sapphire/Emerald, they also have a 50% chance of holding a Leppa Berry.
037 Vulpix (50%) Rawst Berry Available in LeafGreen.
038 Ninetales (50%) Rawst Berry
040 Wigglytuff (5%) Oran Berry This is the only game until Sun/Moon where they can hold any items.
058 Growlithe (50%) Rawst Berry Available in FireRed. 100% chance in Ruby/Sapphire/Emerald.
059 Arcanine (50%) Rawst Berry 100% chance in Ruby/Sapphire/Emerald.
065 Alakazam (5%) TwistedSpoon
068 Machamp (5%) Focus Band Only game where they can hold this item until Omega Ruby/Alpha Sapphire.
075 Golem (5%) Hard Stone Holding an Everstone in all other games.
083 Farfetch'd (5%) Stick Available by in-game trade.
085 Dodrio (5%) Sharp Beak
090 Shellder (5%) Big Pearl (50%) Pearl Available in FireRed.
091 Cloyster (5%) Big Pearl (50%) Pearl
094 Gengar (5%) Spell Tag Has no held items in any other games.
120 Staryu (5%) Star Piece (50%) Stardust Available in LeafGreen.
121 Starmie (5%) Star Piece (50%) Stardust
149 Dragonite (5%) Dragon Claw Holding a Dragon Scale in all other games.
151 Mew (100%) Lum Berry
170 Chinchou (5%) Yellow Shard
171 Lanturn (5%) Yellow Shard
173 Cleffa (5%) Moon Stone In Ruby/Sapphire/Emerald, they also have a 50% chance of holding a Leppa Berry.
174 Igglybuff (5%) Oran Berry This is the only game they can hold any items in.
186 Politoed (5%) King's Rock
199 Slowking (5%) King's Rock
203 Girafarig (5%) Persim Berry Available with the Japan-only e-Reader cards.
208 Steelix (5%) Metal Coat
213 Shuckle (100%) Berry Juice Available with the Japan-only e-Reader cards. Holding an Oran Berry in Ruby/Sapphire/Emerald.
216 Teddiursa (5%) Sitrus Berry (50%) Oran Berry Available with the Japan-only e-Reader cards. This is the only game they can hold any items in.
217 Ursaring (5%) Sitrus Berry (50%) Oran Berry This is the only game they can hold any items in.
227 Skarmory (5%) Sharp Beak
230 Kingdra (5%) Dragon Scale
233 Porygon2 (100%) Up-Grade This is the only game they can hold any items in.
241 Miltank (100%) Moomoo Milk
242 Blissey (5%) Lucky Egg
251 Celebi (100%) Lum Berry
261 Poochyena (5%) Pecha Berry
262 Mightyena (5%) Pecha Berry
263 Zigzagoon (5%) Oran Berry
264 Linoone (5%) Sitrus Berry (50%) Oran Berry
267 Beautifly (5%) Silver Powder
269 Dustox (5%) Silver Powder
284 Masquerain (5%) Silver Powder
293 Whismur (5%) Chesto Berry
294 Loudred (5%) Chesto Berry
295 Exploud (5%) Chesto Berry
297 Hariyama (5%) King's Rock
300 Skitty (5%) Leppa Berry
301 Delcatty (5%) Leppa Berry
304 Aron (5%) Hard Rock
305 Lairon (5%) Hard Rock
306 Aggron (5%) Hard Rock
315 Roselia (5%) Poison Barb
316 Gulpin (5%) Big Pearl
317 Swalot (5%) Big Pearl
322 Numel (100%) Rawst Berry
323 Camerupt (100%) Rawst Berry
327 Spinda (5%) Chesto Berry
328 Trapinch (5%) Soft Sand
331 Cacnea (5%) Poison Barb
332 Cacturne (5%) Poison Barb
337 Lunatone (5%) Moon Stone
338 Solrock (5%) Sun Stone
351 Castform (100%) Mystic Water
352 Kecleon (5%) Prisim Berry
353 Shuppet (5%) Spell Tag
354 Banette (5%) Spell Tag
355 Duskull (5%) Spell Tag
356 Dusclops (5%) Spell Tag
362 Glalie (5%) Never-Melt Ice
366 Clamperl (5%) Blue Shard
369 Relicanth (5%) Green Shard
370 Luvdisc (50%) Heart Scale
371 Bagon (5%) Dragon Scale
372 Shelgon (5%) Dragon Scale
373 Salamence (5%) Dragon Scale
374 Beldum (5%) Metal Coat
375 Metang (5%) Metal Coat
376 Metagross (5%) Metal Coat
385 Jirachi (100%) Star Piece

Unused Code

Hmmm...
To do:
Isn't this in Ruby and Sapphire?

Diagonal Movement

The movement table, located at 3A64C8, contains the directions the player or an NPC must move in. However, after the first five entries (steady, down, up, left, right), four more follow, resulting in diagonal movement when activated. Using them results in some glitches with warps and map rendering. It should be noted that the games feature buildings with otherwise strange diagonal corners, contrasting with the buildings of the original games.

This feature was not implemented in any final version until the X and Y releases.

Wild Double Battles

Some data suggests wild double battles were originally planned for this generation, but were delayed until Generation IV. For example, a string "Wild [buffer1] and [buffer2] appeared!" is located at 3FD2BF, and setting only bit 0 in the battle type flag at 02022B4C in the RAM results in such a battle, if used at the right moment.

As with the previous feature, it isn't finished and may result in some bugs.

Build Dates

Version FireRed
Location
LeafGreen
Location
ASCII String
Japanese v1.0 0x1CDE34 0x1CDE10
2003 12 29 23:17
Japanese v1.1 0x1C9704 0x1C96E0
2004 03 01 16:45
US/English v1.0 0x1E9F14 0x1E9EF0
2004 04 26 11:20
US/English v1.1 0x1E9F84 0x1E9F60
2004 07 20 09:30
Spanish 0x1E575C 0x1E5738
2004 07 20 15:50
French 0x1E43FC 0x1E43D8
2004 07 21 13:50
German 0x1E9EC0 0x1E9E9C
2004 07 26 17:40
Italian 0x1E3094 0x1E3070

Build Information

Hmmm...
To do:
There's more source paths, and more interesting text.

Near the build date info is a plain-text string showing the build path and a few build variables. The Japanese 1.0 revisions use relative paths instead of the full paths, both English revisions (1.0 and 1.1) have this line in full, and the Japanese 1.1 revisions no longer have this information.

  • FireRed JP 1.0 (location 1CDE8A) and LeafGreen JP 1.0 (location 1CDE66):
../gflib/malloc.c
 0
 p != NULL
 pos->magic_number == MALLOC_SYSTEM_ID
 pos->flag == TRUE
 pos->next->magic_number == MALLOC_SYSTEM_ID
 pos->prev->magic_number == MALLOC_SYSTEM_ID
  • FireRed US 1.0 (location 1E9F68), LeafGreen US 1.0 (location 1E9F44), FireRed US 1.1 (location 1E9FD8), and LeafGreen US 1.1 (location 1E9FB4):
C:/WORK/POKeFRLG/src/pm_lgfr_ose/source/gflib/malloc.c
 0
 p != NULL
 pos->magic_number == MALLOC_SYSTEM_ID
 pos->flag == TRUE
 pos->next->magic_number == MALLOC_SYSTEM_ID
 pos->prev->magic_number == MALLOC_SYSTEM_ID

Revisional Differences

These changes apply to the English version of the games.

  • Version 1.0 of the American release does not show "PRESENTS" on the Game Freak logo screen, although the tile graphics are present in the ROM. This was likely due to a bug introduced during the localization process, as the original Japanese versions do display this.
US v1.0 US v1.1
EnglishV1.0FireredGameFreakLogo.png EnglishV1.1FireredGameFreakLogo.png
  • In v1.0, species names in the Pokédex only display the first word due to the game incorrectly interpreting the space character as a null terminator. For example, Pidgey's species name is listed as "Tiny" rather than "Tiny Bird".
  • In v1.0, Chikorita's FireRed Pokédex entry refers to its "leaves". In v1.1, the entry instead refers to a singular "leaf".
  • In v1.0, Tyranitar has the same Pokédex entry in both FireRed and LeafGreen. In v1.1, Tyranitar has a new Pokédex entry in FireRed.
  • In v1.0, the Pokédex help menu advises the player to select "AREA" to display a Pokémon's habitats on the Town Map. In v1.1, it instead advises the player to select "NEXT DATA".