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Pokémon Red and Blue

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This page contains changes which are not marked for translation.

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Title Screen

Pokémon Red Version and Blue Version

Also known as: Pokémon Version Rouge et Version Bleue (FR), Pokémon Rote Edition und Blaue Edition (DE), Pokémon Edición Roja y Edición Azul (ES), Pokémon Versione Rossa e Versione Blu (IT), Pokémon Versão Vermelha e Versão Azul (BR), Pocket Monsters Aka & Midori (JP), Pocket Monsters Ao (JP)
Developer: Game Freak
Publisher: Nintendo
Platforms: Game Boy, Super Game Boy
Released in JP: February 27, 1996 (Red & Green), October 15, 1996 (Blue)
Released in US: September 30, 1998
Released in EU: October 5, 1999
Released in AU: October 23, 1998

AreasIcon.png This game has unused areas.
CodeIcon.png This game has unused code.
DevMessageIcon.png This game has a hidden developer message.
DevTextIcon.png This game has hidden development-related text.
GraphicsIcon.png This game has unused graphics.
ItemsIcon.png This game has unused items.
MusicIcon.png This game has unused music.
SoundIcon.png This game has unused sounds.
TextIcon.png This game has unused text.
DebugIcon.png This game has debugging material.
RegionIcon.png This game has regional differences.
Carts.png This game has revisional differences.

NotesIcon.png This game has a notes page
BugsIcon.png This game has a bugs page
PrereleaseIcon.png This game has a prerelease article

If you wanna be the very best, like no one ever was, these might be the games for you.

Note: Like the early Final Fantasy series, when it comes to localization, the first batch of Pokémon games have been met with much confusion. As a result, this page covers the initial Japanese versions, titled Red and Green, the updated Blue revision, and the subsequent international localizations (confusingly dubbed Red and Blue) that drew from the latter.



Miscellaneous Data
This computer has a cloaking device.

Debug Content

Debug Functions
Nintendo and Sony: Friends, rivals, Pokémon trainers.


Pokemon RGB-Lance Walking Left.png
Unseen Graphics
Everyone knows that cats like to hide under vehicles.


Pokemon RGB-Pokeball.png
Unobtainable Items
No Safari Balls for you.


Pokemon RGB-Pokedex.png
Unused Maps
The town with no name.


Pokemon RGB-Falling Star.png
Unused Move Data
Ground rose up somewhere!


Internal Index Number

Pokemon RGB-Golbat.png
Internal Index Number
1, 2, Pikachu... 3, 4, Exeggutor...


Pokemon RGB-MissingNo.png
I'm sorry, I think you've got the wrong number.


Pokemon RGB-Prof Oak.png
Unused Trainers
PROF.OAK wants to fight!


Pokemon RGB-North West.png
Unused Text
A wizard has turned you into a Wailmer. Is this awesome? YES / NO

Version Analysis

Translation Errors
Text errors from when the game was translated from one language to another.
Version Differences
Differences in versions, as well as localization changes.


Celadon House

Location of the deleted entrance
An unused warp exists in Celadon City where the door to a house would be, but the door is not found in the final game. The warp leads to the fifth floor of the Celadon Department Store (map 136).

Since it would be unreasonable to end up on the fifth floor of somewhere from Celadon City and not the first floor, it may suggest that map 136 was altered at some point in the game's development. Further supporting this theory, the other floors (in order) for the Celadon Department Store have index numbers 122-125 respectively. The fifth floor (map 136) does not follow this pattern.

Exit location data exists for the map (the exit point index number is 08).

You can create a door to access the warp with the GameShark code 017C72C8. You can appear where the warp is by using the GameShark codes 0108B5D3 0108B1D3, entering a certain map in Celadon City (such as the Pokémon Center) and exiting.

(Source: Torchickens & IIMarckus)


Unused Song

Game Genie Code Offsets to Patch
132-2FB-F7D 0x822F to 13
692-30B-7F7 0x8230 to 69
CF2-32B-917 0x8232 to CF
692-33B-4CB 0x8233 to 69

Red and Blue both contain a short unused song with no defined pointers. The song appears to be incomplete, as it only has two channels whose octaves are set too high. In the ROM, the song's tempo is defined, being relatively quick. The two channels are located in the ROM at offsets 0xA913 and 0xA9CF. The ditty can be patched into Pallet Town by using a Game Genie code or manually patching a set of offsets, both displayed at right.

A fan-restored version of the track provides an example of how the song might have sounded:

Damaged Version:

Restored Version:

According to some recently unearthed information, it seems this was meant for trading and the track's channels were meant to be split between both Game Boys with one channel playing on one gameboy and the other playing on the other Game Boy.

(Source: Koolboyman - Restoration)
(Source: [1] Helix Chamber's asset file download)

Unused Cry Base

To do:
Get offsets.

An unused cry base. This is not referenced by pointer table, therefore there is no ID associated with this cry base. This would later find its way into Pokémon Crystal, where it's still unused and unreferenced.

Unused Type

The BIRD type.

While Flying-type Pokémon are familiar to fans, Generation I and II also feature an unused Bird type. It has no weaknesses or resistances, and is only applied to MissingNo.


Pokémon Cries

For some reason, Ditto and Poliwag share the same cry, as do Charizard and Rhyhorn; the only Pokémon in the Gen I and II games to do so, with the exception of MissingNo.

Internal ID Pokémon Base Type Base Pitch Length Base Pitch Length
Hex Dec. Hex Dec.
4C 076 Ditto Pidgey 0E 0FF 0FF 14 255 255
47 071 Poliwag Pidgey 0E 0FF 0FF 14 255 255
B4 180 Charizard Charmander 04 000 080 4 0 128
12 018 Rhyhorn Charmander 04 000 080 4 0 128

For more information on Pokémon cries, see the respective Notes pages for Pokémon Red & Blue and Pokémon Gold & Silver.