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Pokémon Crystal

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This page contains changes which are not marked for translation.
Other languages:
English • ‎polski • ‎日本語 • ‎한국어

Title Screen

Pokémon Crystal Version

Also known as: Pokémon Version Cristal (FR), Pokémon Kristall-Edition (DE), Pokémon Edición Cristal (ES), Pokémon Versione Cristallo (IT), Pokémon Versão Crystal (BR), Pocket Monsters Crystal Version (JP)
Developer: Game Freak
Publisher: Nintendo
Platform: Game Boy Color
Released in JP: December 14, 2000
Released in US: July 30, 2001
Released in EU: November 2, 2001
Released in AU: September 30, 2001

CodeIcon.png This game has unused code.
DevTextIcon.png This game has hidden development-related text.
MinigameIcon.png This game has unused modes / minigames.
GraphicsIcon.png This game has unused graphics.
ItemsIcon.png This game has unused items.
MusicIcon.png This game has unused music.
DebugIcon.png This game has debugging material.
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
NotesIcon.png This game has a notes page

Pokémon Crystal is the update to Pokémon Gold and Silver with a focus on Suicune and mobile phone stuff, the latter of which is exclusive to the Japanese version.

The game is notable for being the first core Pokémon RPG to include a female protagonist and to experiment with online functionality that would be readded in future generations (one example being the predecessor to the GTS).


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
Miscellaneous tidbits that are interesting enough to point out here.
Widthpx Debugging Material
The Japanese version has a boatload of debugging functions!

Unused Files


This rearrangement of the Pokémon Center music is used once the player successfully connects to the Mobile System GB service for the first time, and is therefore never heard in the international versions. Its music ID is 0x66.

This theme is used when accessing the Mobile menu, and is therefore never heard in the international versions. Its music ID is 0x5E.

This theme is used on the mobile connection screen, and is therefore never heard in the international versions. Its music ID is 0x5F.

Sound Effects

Please refer to the equivalent section in the article about Gold and Silver.


Data for an unused base cry can be found in the ROM at 0xF35D3. This is a leftover from Pokémon Red and Blue, and just like in those games here it isn't referenced by any pointer table, therefore there is no ID associated with this base cry. A cry using this base can be played using the following Game Genie codes, replacing Marill's cry:

  • 76D-899-2AB
  • 09D-889-D5A
  • 75D-869-5D7
  • EED-859-2AD
  • 75D-839-5D7
  • D3D-829-A21
  • XXB-D09-E6E (upper length value)
  • XXB-CF9-6EA (lower length value)
  • XXB-CE9-E6E (echo value)
  • XXB-CD9-806 (pitch value)

Examples: 0x00 in every code in the bottom group of codes, except for 0xFF as the lower length value, gives a cry like in the sound clip embedded above.

(Source: Pokémon Crystal disassembly (discovery), ChickasaurusGL (Game Genie codes))

Leftover Content


All of the unused maps from Gold and Silver remain in the ROM of Crystal, with even the Game Genie code to restore the Safari Zone gate's door being the same.

Opening Sequence

Gold and Silver Intro

The music from the opening sequences of Gold and Silver also remains in the ROM, despite not being used in Crystal.

The unused Opening Demo track from Gold and Silver. Its ID is 52.

The unused Opening Demo 2 track from Gold and Silver. Its ID is 53.

Crystal Intro

The unused title screen. Without the sprites.

There is an unused title screen in the data that does not reboot the game after the music ends, unlike the final title screen. Part of the title is constituted by sprites, which partially cover the logo. It is programmed at the beginning of bank 43 (address 0x10C000) and is complete with tilesets, palettes and loading functions. To reinstate it, the bytes in the following offsets should be altered in order to load it and disable the regular title screen's animation:

  • English version: change 0x67 in 0x6277 to 0x00 and 0x6D in 0x6278 to 0x40; replace the five bytes in addresses 0x6226-0x622A with F0 A2 A7 28 FB.
  • Japanese version: change 0x67 in 0x63EF to 0x00 and 0x6D in 0x63F0 to 0x40; replace the five bytes in addresses 0x63A0-0x63A4 with F0 A2 A7 28 FB.

Alternatively, the following Game Genie codes may be used:

Japanese English
003-EF9-7F7 002-779-7F7
403-F09-5DF 402-789-5DF
F03-A09-D5D F02-269-D5D
A23-A19-2A5 A22-279-087
A73-A29-6E7 A72-289-6E3
283-A39-2AA 282-299-2AA
FB3-A49-085 FB2-2A9-085
(Source: the Pokémon Crystal disassembly, Crystal_ for finding it in the English version, and SatoMew for looking it up in the Japanese version)

Super Game Boy Features

The unused SGB border from Japanese Gold

Even though Pokémon Crystal is not compatible with the original Game Boy models or the Super Game Boy, it has an unused Super Game Boy border programmed into the game. It can be enabled by setting the flag at offset 146 to 03. It is a leftover from the Japanese Gold version in all releases; given that the border does not fit well with Crystal, it was likely that it was never intended to be used at all. To enable the Super Game Boy features on real hardware or on an emulator, use the Game Genie code 031-46F-E6A (note that because the Super Game Boy checks for the bit after booting, you must first power it up with any game that has Super Game Boy enhancements inserted into the Game Genie, then insert the Pokémon Crystal cartridge with the Game Genie to see the hidden features). It is worth noting that music was planned to play on the error message screen that appears as load functions are present.

There are several other unused palettes that may be leftovers from Gold and Silver. Game Genie codes ??9-A8B-91B + ?69-A7B-B31 will load any of these unused palettes. ATTR_BLK settings are not actual palettes but rather attribute settings and they appear black, so they won't be documented.

(Source: nensondubois for finding palettes and Game Genie music code)


In Gold, the default name for the player's rival when a blank name is provided is SILVER in English and シルバー in Japanese. This remains true in Crystal, which further suggests that it was developed from Gold rather than Silver.

In contrast, the default name in Silver is GOLD in English and ゴールド in Japanese.

Inaccessible Shiny Variants

All 26 forms of Unown have Shiny variants, but ironically enough only "I" and "V" are accessible due to how both Forms and shininess are dependent on IV values.

Version Differences

Title Screen

Japan International
Pocket Monsters - Crystal Version (Japan).png Pokemon-Crystal-Title.png

Japanese Versus Export Versions

Product Code
The product code for the Japanese version of the game is CGB-BXTJ-JPN, with the "J" and "JPN" parts referring to that region.

The export versions differ in not only those region-specific parts of the product code, but also in the first three characters identifying the title (which are CGB-BYT?-??? instead): this abnormal change was deliberate, and intended to reflect the removal of online features (as documented hereafter).

(Source: source code: pmcsrc/HEADER.DMG)

Sprite Changes
The changes relating to Pokémon sprites and trainer sprites in the localizations of Gold and Silver also apply to the localizations of Crystal, with the sole exception being Jynx.

The other changes in the layouts and graphics of the games also apply to Crystal.

PokéCom Center
In the Japanese version, the Pokémon Center in Goldenrod City is replaced with the Pokémon Communication Center (or PokéCom Center for short) to allow access to the Mobile System GB. Japanese players could connect their Game Boy Color or Game Boy Advance to their mobile phones using a special link cable and access the wireless network, which was shut down in December 2002. This feature is very similar to the Global Terminal featured in HeartGold and SoulSilver, which may explain why the Global Terminal in those games was placed in Goldenrod.

Pokemoncrystal outside.png

This is what the PCC looks like from the outside; the sign in front of it says "For mobile tips! POKéCOM CENTER".

Pokemoncrystal pcc.png

This is what the ground floor of the PCC looks like. The leftmost desk continues to operate as a Pokémon healing service, while the center desk acts as the mobile trade center. The area to the far right is the Pokémon News Machine, where players could read about each other's Pokémon adventures. The stairs go to the typical second floor Pokémon Center layout with the regular link cable rooms. The pink door in the upper left corner leads to the Administration Office.

Pokemoncrystal pccflr2.png

The Administration Office, which can be accessed from the aforementioned door at the top-left of the map.

In the international releases, there's an unused warp right above the stairs on the ground floor of the regular Pokémon Center that leads here. Without hacking the ROM or using glitches, it can be accessed with GameShark code 0160E4D4, which alters the behavior of the warp tile so that it behaves like a hole tile.

The Japanese version actually has a bug related to the PCC. As soon as you enter it, the game tries to execute the script ID found at SRAM address A800, which is normally expected to be zero. However, if playing on a fresh cartridge with clear SRAM (i.e. never having saved the game), this address can contain any value due to the arbitrary state of SRAM; the game then tries to execute an invalid script ID, usually resulting in a game freeze. Even though the PCC is not used in the localized versions, the programmers still added a check to see if A800 is zero before attempting to execute the script.

(Source: Bulbapedia)

Pokémon Center
PokemonCrystal PokeCenter 2nd floor.png PokemonCrystal PokeCenter 2nd floor first room.png PokemonCrystal PokeCenter 2nd floor second room.png

Because of the added online functionality, the second floor of every Pokémon Center in the Japanese version has two more doors. These rooms can still be accessed in the international versions by using "Walk through Walls" and "Every Warp Tile is a Hole" codes and stepping on the tile right next to the door.

GS Ball Event
In the Japanese version, the GS Ball, which enables the Ilex Forest event where you can catch Celebi, was distributed as an event item via the Mobile System GB during certain timeslots to Japanese players who had beaten the game and could successfully complete a minigame and a trivia quiz. For the localized versions, which don't have the Mobile System GB, the GS Ball event got reprogrammed and adapted to the regular Pokémon Center, but no such event was ever held overseas. This event can be activated by setting the byte at 0x3E3C (01:BE3C when the game is running) in an English save file to 0x0B which is then backed up to 0x3E44 (01:BE44) and vice-versa. Interesting enough, the event was fully translated, despite being inaccessible through normal gameplay.

In the Virtual Console release, the event was restored in international versions (and altered in Japan due to the loss of the Mobile System GB), allowing all players to receive Celebi, including its Shiny variant, and transfer it to the Generation VII games using Pokémon Bank. The Virtual Console emulator sets the needed flags in the save file when the player enters the Hall of Fame; the ROM of the game is not modified.

Mobile Menu
The Japanese version's Mobile menu was disabled internationally, causing some graphics and music to become unused. Its translation is incomplete, with various untranslated text being displayed as gibberish since most of the Japanese characters are no longer present. The Mobile menu (shown as MOBILE in-game) can be accessed on a save file with GameShark code 010576CF in all non-Japanese versions.

The English localization made the most progress, followed by German and Spanish. The profile entry screen defaults to completely blank except in English.

English German Spanish French Italian
Pokemon Crystal Mobile Password (English 1.0).png Pokemon Crystal Mobile Password (German).png Pokemon Crystal Mobile Password (Spanish).png Pokemon Crystal Mobile Password (French).png Pokemon Crystal Mobile Password (Italian).png

Mobile Connection
Pokemon Crystal (Italian) Mobile Stadium Pichu.png

This screen, which is only used in the Japanese version on the mobile connection screen, even comes with its own tune (see Music).

Mobile Stadium
In the Japanese version, this feature can be used to send data of timed mobile battles to the Japanese version of Pokémon Stadium 2 via the Transfer Pak, which is then converted into a battle video. The Vs. Recorder item in recent Pokémon games provides similar functionality.

Like the Mobile menu, the Mobile Stadium feature was disabled internationally, and it suffers from the same incomplete translation issues. It can be accessed with the aforementioned GameShark code 010576CF in all non-Japanese versions. Interestingly, in the English versions, its entry on the menu is misspelled as MOBILE STUDIUM.

Curiously, German and Spanish, like English, translated the intro text, while it was left blank in Italian and French. Additionally, English revision 1.1 and the European languages have a glitched background due to an unintentional LF→CRLF/CR→CRLF conversion.

Ruins of Alph Dialogue
In the Japanese version, a scientist studying the Ruins of Alph suggests that the Pokémon Communication Center in Goldenrod City affects the behavior of the Unown. This was understandably cut from the localizations, but the translated text remains in the data.

According to my

Those mysterious
patterns appeared
when the POKéCOM
CENTER was built.

It must mean that
radio waves have
some sort of a
(Source: Pokémon Crystal disassembly)

Battle Tower

To do:
Add more info on how it works in the Japanese version.

Another major difference in the localizations of Crystal is the Battle Tower. Unlike in the Japanese release, it does not rely on the Mobile System GB, so it's open to everyone. This also means that access to the tower in the Japanese version after the shutdown of the mobile service is impossible.

In the Japanese version of the Battle Tower, players competed with each other over the Mobile System GB to become Room Leaders, earning their spot on an Honor Roll that could be viewed from the main lobby. In the international versions, the multiplayer functionality, Room Leaders, and the Honor Roll were removed; players instead fight a series of seven generic AI trainers, and are rewarded for defeating all of them with a set of five stat-increasing vitamins.

Despite the change, all of the dialogue relating to the Mobile System GB functionality was translated and remains in the ROM alongside the rewritten text.

Jynx Sprites
Much like with the game's predecessors, Jynx's sprites were modified due to its controversial appearance in the Japanese versions.

Front (old) Front (new) Back (old) Back (new)
Regular Pokemon Crystal (J) (GBC) Jynx.png Pokemon Crystal Jynx edit front.gif Pokemon GSC (J) (SGB, GBC) Jynx back.png Pokemon GSC Jynx edit back.png
Shiny Pokemon Crystal (J) (GBC) Shiny Jynx.png Pokemon Crystal Shiny Jynx edit front.gif Pokemon GSC (J) (SGB, GBC) Shiny Jynx back.png Pokemon GSC Shiny Jynx edit back.png

Odd Egg
While the Odd Egg, a special, Crystal-exclusive egg that can hatch into any baby Pokémon, is obtainable in all versions, there are a few differences in how it's handled in each version. Namely, to obtain it in the Japanese version, the player needs to use the Mobile System GB to obtain an Egg Ticket from the Day Care Man, then take it to the Pokémon Communication Center, where it can be given to the trade corner attendant in exchange for the egg. Since the Mobile System GB was never released outside of Japan, the method of obtaining the Odd Egg was changed to simply talking to the Day Care Man, who will give it to the player.

Moreover, the chance that the Pokémon contained in the egg will be shiny upon hatching is 50% in the Japanese version and 14% in the international versions. In the international versions, the odds differ depending on species and shininess, as follows:

Species Odds Regular Odds Shiny
Cleffa 16% 3%
Elekid 12% 2%
Igglybuff 16% 3%
Magby 10% 2%
Pichu 8% 1%
Smoochum 14% 2%
Tyrogue 10% 1%
(Source: Bulbapedia)

Route 40

Japanese & European English
Pokemon Crystal JP EU Route 40 NPC.png
Pokemon Crystal English Route 40 NPC.png

On Route 40, there's a male NPC who mentions the Battle Tower if you talk to him. In the Japanese version he only appears after enabling the Mobile System GB, while he is always present in the overseas releases. Interestingly, the English versions inexplicably moved this NPC four tiles to the right of his original position. This NPC was moved back to its original spot in the European version.

Updated English Version

Version 1.1 of the game (on which the initial versions of some other translations, such as the Australian one, are built) features a number of minor changes:

  • As documented above, the background of the unused Mobile Stadium/Studium feature was accidentally altered.
  • The Pokédex page number in memory was originally controlled by bit 0x0 of CF65 (the whole address is also modified on the second page of the Trainer Card). In Version 1.1, it is controlled by bit 0x0 of C7E5 instead (the whole address is also modified while walking around).
  • Fixes a bug in Battle Tower Trainer text, as detailed here in the Pokémon Crystal disassembly project:
; Instead of loading the Trainer Class, this routine
; loads the 6th character in the Trainer's name, then
; uses it to get the gender of the trainer.
; As a consequence, the enemy trainer's dialog will
; always be sampled from the female array.

The unused trainer name correction, intended for online multiplayer, renames players with invalid characters in their name as Kurisu in the Japanese versions and Chris in the English ones, but they're left completely undefined in other languages; "Chris" has been added to the German version only, too.

French and Spanish Versions

In the French and Spanish localizations of the game, the trainers' names order is reversed, with the French version carrying this over from Gold and Silver. This breaks the correct interpretation of the text as seen in the example below comparing Spanish Gold and Silver and Spanish Crystal; in the former, the game correctly refers to "Joven Chano" (Youngster Joey), while in the latter, it calls him "Chano Joven" (the meaning changes from a Youngster called Joey to Joey being a young person).

Australian Version

Despite no functionality being removed, unlike in better-known future examples, the Australian version of the game marks the first attempt to censor the theme of gambling in a Pokémon game, resulting in some laughably generic lines (possibly to avoid portraying gambling as exciting).

Goldenrod City

Australian American/European
This machine looks the same as the others. I always play this slot machine. It pays out more than others, I think.
These machines seem different from the ones at CELADON CITY! I just love this new slot machine. It's more of a challenge than the ones in CELADON.
Nothing is certain in this area. Life is a gamble. I'm going to flip cards till I drop!
Card flip… Different from the other machines. Card flip… I prefer it over the slots because it's easier to figure the odds. But the payout is much lower.
COIN CASE? I threw it away in the UNDERGROUND. I couldn't win at the slots, and I blew it on card flipping… I got so furious, I tossed out my COIN CASE in the UNDERGROUND.
(Buena, over the phone) I'm thinking of going to the GAME CORNER tomorrow. It's been a while. Some machines pays out a lot. [sic] I'm thinking of going to the GAME CORNER tomorrow. It's been a while. You see, I have my favorite machine… It pays out a lot, I kid you not!

Celadon City

Australian American/European
I lost at the machines. I lost at the slot machines again… We girls also play the slots now. You should check them out too.
The Game Area for Grown-ups--CELADON GAME CORNER The Playground for Everybody--CELADON GAME CORNER
I don't want to lose my coins. Whew… I've got to stay calm and cool… I can't lose my cool, or I'll lose all my money…
The weather outside is very nice. It's this machine I want. It cleaned me out yesterday, so it should pay out today.
This machine looks the same as the others. I think this slot machine will pay out… The odds vary among machines.
Whoa! What? You want to play this machine? Here, take my coins. Gahahaha! The coins just keep popping out! Hm? What, kid? You want to play? I'll share my luck with you!
Your COIN CASE is full. Hey, your COIN CASE is full, kid. You must be riding a winning streak too.
Hey! CHAMP in making! Are you playing too? I'm trying to get enough coins for a prize POKéMON. But I don't have enough coins yet… Hey! CHAMP in making! Are you playing the slots too? I'm trying to get enough coins for a prize POKéMON. But I don't have enough coins yet…
Is there any difference between these lines? Hmmm… The odds are surely better for PIKACHU's line, but… What to do?

There's also an undocumented difference in the Mobile Stadium feature.

(Source: Github)

Virtual Console Versions

When brought over to the Virtual Console, Crystal received a few changes:

  • When initiating a link, the Cable Club attendant's dialogue is replaced by the Virtual Console's menu on the touch screen.
  • The Game Boy Printer's features are disabled, although the corresponding option still appears in the Pokédex and the PC menu. When selected, the game will act as if the printing is in progress, even though internally nothing is happening.
  • In addition, due to the Mobile System GB not being present, Japanese players are unable to access the Egg Ticket, Battle Tower, or any of the features in the Pokémon Communication Center.
  • Some Pokémon moves had their animations changed slightly to tone down the flashing by dimming the screen.
  • In the Japanese version, Jynx's sprites were changed to that of the international ones.
  • The event allowing the player to obtain the GS Ball and capture Celebi will be activated after entering the Hall of Fame and then entering the PokéCom Center (in the Japanese release) or Goldenrod City's Pokémon Center (in international releases).

The Poké Transporter app of Pokémon Bank was also updated, allowing player to send their Pokémon to the online storage and from there to transfer them to the Generation VII core series games.