Please consider supporting The Cutting Room Floor on Patreon. Thanks for all your support!

Pokémon Red and Blue/Version Differences

From The Cutting Room Floor
Jump to: navigation, search
This page contains changes which are not marked for translation.

Other languages:
English • ‎한국어
This is a sub-page of Pokémon Red and Blue.
To do:
Should the "lost in translation" entries be removed, or kept?

Regional Differences

Lost/Changed in Translation

Silph Co's Other Branch

In the original Japanese games, the Scientist at 6F of Silph Co. refers to a supposed branch of the company in Ponaya Tunguska (「ポナヤツングスカ」), possibly a reference to the Podkamennaya Tunguska river in Russia. In the English versions, he instead refers to the branch as being in the real-life city of Tiksi, also in Russia.

It is not certain why the branch's location was changed; the original location appears to reference the area most affected by the Tunguska event.

Pokémon Mansion Diaries

In the original Japanese games, the diary entries on Cinnabar Island imply that one person was involved in the discovery and cloning of Mew as well as the subsequent creation of Mewtwo, as evidenced by the use of 「わたし」 (watashi), which means "I". Nowhere in the Japanese dialogue is 「わたしたち」 (watashi-tachi), or "we"; furthermore, in the Japanese February 6 diary entry, the sentence is worded in an impersonal manner.

In the English Red and Blue, all the diary entries except the July 5 one use "we" instead. It's possible this was changed to tie in with Pokémon: The First Movie, which had already come out in Japan by the time of the games' international release and depicts the above events as being the result of a team.

Chief Trainer Class

The Japanese name of the unused Chief Trainer class is 「シルフのチーフ」 (Silph's Chief), implying that the player was originally meant to battle Silph Co.'s president. He is also mentioned by a leftover NPC dialogue at the Safari Zone in the Japanese Red, Green, and Blue.

Bike Shop

The bike shop in Cerulean City has the name 「ミラクルサイクル」 (Miracle Cycle) but this was removed from the localizations.

Removed References

The German Rot und Blau removed references to real life. For example, the "Guyana, South America" line in the aforementioned July 5 diary entry was changed to "Dschungel tief im Niemandsland.", which translates back to English as "Jungle, deep in no man's land."

(Source: tekcoR)

Revisional Differences

Map Changes

Cerulean Cave (ハナダのどうくつ), known as Unknown Dungeon (ななしのどうくつ) in Generation I, underwent layout changes for every Japanese Generation I release. The first layout was used in Japanese Red and Green, which was changed for Japanese Blue. The latter was retained for Red and Blue's international releases. Both the Japanese and international releases of Yellow had a third, simpler, layout.

The three layouts are pictured below.

Floor 1F
PKMN RG J Unknown Dungeon 1F.png PKMN RB U Unknown Dungeon 1F.png PKMN Y Unknown Dungeon 1F.png
Red JP

Green JP

Blue JP

Red US Blue US

Yellow JP

Yellow US

The 1F layouts in Red, Green, and Blue function as mazes: the player can encounter dead-ends, and has to find the correct ladder in order to proceed. The Yellow 1F has a route that's more linear and easy to navigate.

Floor 2F
PKMN RG J Unknown Dungeon 2F.png PKMN RB U Unknown Dungeon 2F.png PKMN Y Unknown Dungeon 2F.png
Red JP

Green JP

Blue JP

Red US Blue US

Yellow JP

Yellow US

2F is the trickiest floor to navigate. While the ladders remain in the same positions in each of the three layouts, the maze around them differs.

Floor B1F
PKMN RG J Unknown Dungeon B1F.png PKMN RB U Unknown Dungeon B1F.png PKMN Y Unknown Dungeon B1F.png
Red JP

Green JP

Blue JP

Red US Blue US

Yellow JP

Yellow US

The positions of B1F's items are different between layouts. However, each layout features a straightforward path to the final goal: a wild Mewtwo, lying in wait.

Hidden Items

Four hidden items were moved between Red/Green and Blue. These changes were retained for the international versions.

  • Copycat's house 2F: The Nugget was moved from the bed to the desk. Note that this is one of the hidden items affected by the hidden item glitch (see below).
  • S.S. Anne B1F: There was an out-of-bounds Hyper Potion that could only be obtained by facing the void in the corner of one of the cabins. This item was moved to the bed instead.
  • Silph Co. 5F: The Elixer was moved from the left plant to the right plant.
  • Route 17: The Rare Candy was moved one tile up to make it harder to accidentally bump into the trainer trying to collect this hidden item.

Original Blizzard Freezing Chance Value

In the original Japanese releases, Blizzard has a 30.1% chance of freezing. The localizations, Pokémon Stadium, and the Japanese Yellow, when played in Colosseum 2 mode reduce this to 10.2%. The English Yellow instruction booklet mistakenly claims that Blizzard freezes less frequently in Colosseum 2 mode, which is only true in the Japanese releases since the value was reduced to 10.2% everywhere already in Red and Blue.

Original Move Animations

To do:
Get gif of Body Slam animation, check for differences in other move animations.

In the Japanese Red, Green, and Blue, using certain moves, such as Thunderbolt, Body Slam, or Hyper Beam, results in more rapid screen flashes than in the localizations. This was changed possibly to remove the risk of seizures following Episode 38 of the original Pocket Monsters anime series, titled "でんのうせんしポリゴン" (Dennō Senshi Porygon, which translates to "Computer Warrior Porygon" or "Computer Soldier Porygon").

Red and Green International Red and Blue
Pokemon Green Thunderbolt.gif Pokemon Blue Thunderbolt.gif
Red and Green International Red and Blue
Pokemon Green Hyper Beam.gif Pokemon Blue Hyper Beam.gif

PC Boxes

The amount of PC Boxes in the Pokémon Storage System was upped from to 8 to 12 in the localizations due to the maximum number of Pokémon per Box being dropped from 30 to 20.


In the Japanese Red & Green, MissingNo.'s Pokédex species value as the ??? Pokémon doesn't appear upon capture, unlike the Japanese Blue. Missingno.'s Pokédex entry will appear provided that Cubone is not marked as seen in the Pokédex.

In the Japanese Blue only, MissingNo. has a placeholder Pokédex entry of "コメント さくせいちゅう" ("comment under construction").


In the Japanese Red, Green and Blue (and also Yellow), the moves Absorb, Mega Drain, Leech Life and Dream Eater fail if the enemy Pokémon has a substitute. This was changed for the English version and all other localizations.

Strangely, this behavior later reappears in Pokémon Gold and Silver (and Crystal) in all versions, as well as Pokémon Stadium. It was fixed back in the Generation III games.

Pokédex changes

In the Japanese Red and Green, Nidoqueen was listed in the Pokédex as weighing 6.0 kg, whereas her male counterpart Nidoking weighs 62.0 kg. This was corrected in Japanese Blue, where Nidoqueen weighs 60.0 kg, and subsequently adopted in the localizations where she weighs 132.0 lb.

As well, Geodude was listed as weighing 2.0 kg in Japanese Blue only. In every other version, including Red/Green, Yellow and the localizations, Geodude weighs 20.0 kg (or 44.0 lb).

Safari Zone Entrance Fee

In all versions of the game, you need to pay 500 Pokédollar to enter the Safari Zone without exceptions, except in the Yellow version where if you don't have enough money and keep trying to enter, the man at the entrance will eventually let you in for free. This change might have been made to avoid an unwinnable situation that can occur where you cannot afford to enter the Safari Zone and get required key items to finish the rest of the game.


Virtual Console Revisions

Wireless trading was included, but this was via a modified emulator spoofing the Link Cable and did not affect the ROM of the game. Additionally, as the game is locked in Game Boy mode, the Super Game Boy enhancements are inaccessible.

Move Animations

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.

The following move animations were changed slightly to avoid rapid flashing, as usual, to comply with current seizure protection standards.

  • Blizzard
  • BubbleBeam
  • Confusion
  • Dream Eater
  • Explosion
  • Guillotine
  • Hyper Beam
  • Mega Kick
  • Mega Punch
  • Psychic
  • Reflect
  • Rock Slide
  • Selfdestruct
  • Spore
  • Thunderbolt
(Source: Serebii)


Empty Pokémon List Glitch

Red JP Green JP Blue JP

In the Japanese releases, withdrawing the Potion at the beginning of the game and using it without any Pokémon brings up the Pokémon menu, even though the player has no Pokémon, due to an oversight in the coding. This was patched in the Japanese Yellow and the localizations, which bring up the message "You don't have any/a Pokémon!" (Japanese: ポケモンが 1ぴきも いない!)

Hidden Item Glitch

Red JP Green JP

Pokémon Red and Green have six hidden items that do not work correctly because their coordinates in the hidden item database do not match their actual coordinates on the map (or, in one case, are missing altogether). These items are listed here, first with their actual locations and then, in square brackets, with the locations pointed to by the hidden item database:

  • Nugget (Rocket Hideout B3F, next to TM10) [on the eastern machine in the south]
  • Calcium (Route 13, next to a sign) [southeast corner, behind a cuttable tree]
  • Rare Candy (Pokémon Mansion B1F, northwest corner of the west room) [no coordinates!]
  • Nugget (Copycat's house 2F, on her bed) [on her PC]
  • Rare Candy (Cerulean Cave 1F, on a rock in the center of the map) [just one tile to the right]
  • Ultra Ball (Cerulean Cave B1F, on a rock in the northeast corner of the map) [outside of the map boundaries]

Because their coordinates do not match, collecting one of these items will cause all other items in the list to disappear. However, they can be respawned by handing over a fossil to the scientist in the Pokémon lab, because the flag that is set when collecting one of these items (flag 255, outside of the actual list of flags for collectibles) uses an address that is also set when handing over fossils. Since the Itemfinder goes by the coordinates in the hidden item database, it will mislead you and not point to the actual locations of these hidden items.

These were fixed in Japanese Blue and the international versions.

Oak's Parcel Glitch

Red JP Green JP Blue JP Yellow US Yellow JP

In the Japanese releases, if the player already has two Pokémon species registered as caught (by evolving their starter Pokémon) before returning to Professor Oak to deliver Oak's Parcel, the game acts as if the player has already obtained the Pokédex even though they haven't, thus it becomes impossible to progress through the game because the old man in Viridian City will only move after the player has actually obtained the Pokédex.

This glitch does not occur at all in English Red and Blue, but a glitch can be used to get it to occur in both Japanese and English Yellow (see below).

In English Yellow and Japanese Yellow

The Oak's Parcel glitch also "occurs" in both Japanese Yellow and the localized Yellow, but since the walking Pikachu cannot be evolved/traded before delivering Oak's Parcel, this is normally impossible. However, the glitch can be seen through the use of a certain SRAM glitch. (video)

This SRAM glitch allows the player to either transfer old party Pokémon from an existing save to a new game, or obtain a party of 255 Pokémon if no save existed. The old party Pokémon won't be registered in the Pokédex, but evolving a Pokémon will register the evolved Pokémon. This means the player can obtain Pikachu and then evolve a Pokémon like Caterpie to trigger the glitch. If the 255-party Pokémon glitch is used, the player can do an action like swapping the second Pokémon with the tenth to corrupt the "seen" and "own" Pokédex bytes.

Closed Menu Select Button Glitch

Red JP Green JP Blue JP

As the name implies, these glitches involve the Select button and closing a menu. The derivatives of these glitches are commonly known in Japanese as simply "Select bugs" (セレクトバグ). The closed menu Select button glitch was fully fixed in Japanese Yellow and the localizations.

In applicable versions, when the player presses Select on an item, the position of the white cursor is saved when the item menu is closed with B, B. If the player then opens the Pokémon menu without using the Start menu (through a battle, a trade NPC, or the Name Rater) it is possible to exchange a "Pokémon", such as one beyond the final slot, for a Pokémon that the player presses A on. Similarly, it is possible to exchange a "move" in battle beyond the last move for a move that the player presses select on.

In the original version of Red and Green, a closed menu Select button glitch could be achieved through opening the item menu within battle. "Rev A" of Red and Green (or "Version 1.1") patched this, as well as Japanese Blue by resetting the memory address CC35 to 00 when the items menu is closed within battle, but the glitch can still be achieved in Red/Green Rev A and Japanese Blue by opening the items menu from outside of battle.

This glitch allows for many memory corruption glitch techniques used by Japanese glitchers. A popular Select glitch is the "dokokashira door glitch", which allows the player to decrease the warp destination value by 1 for certain warps every four steps. A description of the mechanics for this particular Select glitch can be found here.

Special Menu Select Button Glitch

Red JP Green JP Blue JP

This is a simpler Select button glitch than the closed menu Select button glitch. It was never fixed until Japanese Yellow and the localizations. In a list of elevator destinations, or the list of badges for the Cerulean City "badge guy", it is possible to "swap" the entries as if they were items, even though the cursor is not highlighted white.

After swapping some entries, the list type may change to something like a list of boxed Pokémon. Corruption of the player's name, party and items is also possible in at least Japanese Blue. (video)

Viridian Old Man Glitch

Red US Blue US

One of the most famous glitches in Red and Blue, talking to the old man in Viridian City and watching his tutorial on catching Pokémon copied the player's name to an area normally used to determine wild Pokémon found in the Grass. If one were then to fly to Cinnabar Island and surf along the east coast, invalid Pokémon would appear corresponding to the player's name.

This glitch resulted from a localization oversight that changed the tile that determines the battle type from the lower right to the lower left while leaving the tile that determines if there can be a battle to the lower right. It did not occur in Japanese Red, Green, or Blue, where the Cinnabar Island coast triggers zero wild Pokémon.

This specific method of performing the glitch was partially fixed in the Spanish and Italian versions. As a result, attempting to perform this glitch in these versions will result in the normal wild Pokémon encounters that you'd get in the water surrounding Cinnabar Island. However, using a glitch or cheat that allows you to walk on the east coast (rather than surf) enables the glitch again. As another side effect, this fix enables a glitch exclusive to the Spanish or Italian versions where surfing on any ground tile that allows wild encounters (tall grass or caves), which can be accomplished with the Surf glitch, will also give invalid Pokémon corresponding to the last trainer battled.

Red JP Green JP Blue JP

The Japanese versions, on the other hand, had a different bug: if your Pokémon roster and the currently active PC Box are both full, the Old Man won't be able to catch the Weedle and go into an infinite loop, effectively locking up the game. This was fixed in the localized versions.

Brock-Skipping Glitch

Red JP Green JP Blue JP Red US Blue US

To do:
Find in which regional releases was this glitch fixed.

In certain regional releases of Red and Blue, such as the English localization, it is possible to skip the battle against Brock by saving in the right spot and resetting to bypass the person blocking the path to Route 3. However, this was fixed in various European releases, such as the Spanish localization.

Man on the Roof Glitch

Red JP Green JP Blue JP Red US Blue US

Pokemon RB man on roof.png
To do:
Figure out which regional releases had this glitch fixed.

On Cinnabar Island, if the player doesn't have the Secret Key in the Bag and uses a Pokémon with Surf to surf on the east coast, returns to the shore while near the Gym and walks in front of the Gym's door, a sprite of an old man will appear on the roof of the Cinnabar Gym while the text box saying "The door is locked..." appears. After the text box disappears, the sprite will vanish.

There are other variations of this glitch, such as when pressing Start as soon as the player enters Nugget Bridge or Route 6. All variations were fixed in the Spanish localization and possibly other European releases.

Sabrina Glitch

Red JP Green JP

The Japanese Red and Green contain one of the "How did the developers not catch that?!" bugs. Losing to Sabrina in Saffron Gym made the game think you won against her, so re-entering the Gym triggered the post-battle text, granting you TM46 (Psywave) and the Marsh Badge. This was fixed for Japanese Blue and all localizations. (video)

Cliff Glitch

Red JP Green JP

In Japanese Red and Green, it's possible to surf from the "north edge" tile of a cliff. This allows the player to avoid the "current is too fast" message in Seafoam Islands and catch Articuno without solving the boulder puzzle. This glitch was fixed in Japanese Blue and later versions. (video)

Seafoam Islands Blank Text Box Glitch

Red JP Green JP Blue JP

In Japanese Red, Green, and Blue, a blank text box can displayed when pressing A button on the right spot. Depending on the version, the glitch will behave differently:

  • After closing it in Red and Green, all the menu interfaces will become slower until the option is accessed.
  • After opening it in Blue, the music will stop and the game will freeze.

This glitch was fixed in all other localizations. (video)

Swift Glitch

Red JP Green JP Blue JP Yellow JP

Swift is a move that is supposed to never miss against the opponent, even if the opposing Pokémon is in the invulnerable turn of moves such as Dig or Fly. However, due to a bug, this applies to the Japanese version only if the enemy Pokémon has a substitute. In all other cases, Swift acts as a normal move which also means that it's affected by accuracy modifiers such as Double Team and Sand-Attack and also the 1/256 chance of missing like any other move in RBY.

This was fixed in the English version.

Partial trapping move glitch

Red JP Green JP

This is a very odd bug that seemingly only happens in the "Rev A" (i. e. Version 1.1) version of Red and Green; it doesn't occur either in the original version or in the international versions.

If the player's Pokémon is trapped by a partial trapping move (such as Wrap), but the opponent's Pokémon dies from burn or poison damage, both the user and the opponent will faint. This doesn't happen the other way around (i. e. the player's Pokémon uses a partial trapping move and then faints from burn or poison) and as such, if this glitch occurs in a link battle, it causes a desync and as such glitch Pokémon may appear on either player's side.