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Pokémon Red and Blue/Version Differences

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


This is a sub-page of Pokémon Red and Blue.

The various iterations of Pokémon Red and Blue have had some content modified content across their various releases.

Revisional Differences

Title Screen Changes

The title screen had the logo changed to its international equivalent, the "POCKET MONSTERS" subtitle was removed, the copyright dates were updated, and the "Red Version" subtitle was given a red palette. Border-wise, "•RED" and "•BLUE" were re-centered, the "POCKET MONSTERS!" were removed (alongside the tildes in Red's border) and in the case of Blue's border extra Poké Balls were added where it once stood (the leftmost Ball was also inexplicably changed from a blue one to a red one).

Japan US
1996 - Pocket Monsters Red.png 1996 - Pokemon Red (27-02-1996).png
1996 - Pocket Monsters Blue.png 1996 - Pokemon Blue (27-02-1996).png

Map Changes

The Unknown Dungeon (or "Cerulean Cave" in later games) underwent layout changes for every Japanese Generation I release, with it having a total of three different layout for all three of its floors.

Floor 1F

Red and Green International Red and Blue
PKMN RG J Unknown Dungeon 1F.png PKMN RB U Unknown Dungeon 1F.png

Floor 2F

Red and Green International Red and Blue
PKMN RG J Unknown Dungeon 2F.png PKMN RB U Unknown Dungeon 2F.png

Floor B1F

Red and Green International Red and Blue
PKMN RG J Unknown Dungeon B1F.png PKMN RB U Unknown Dungeon B1F.png

Tile Changes

A few of the sign tiles in the overworld tileset were modified when the games were localized, namely due to the fact that they contain words.

Gyms Poké Marts Pokémon Centers
Japan
PokémonRB TileGym.png
PokémonRB TileShop.png
PokémonRB TilePOKE.png
English
PokémonRB TileGym.png
PokémonRB TileMart.png
PokémonRB TilePoké.png
French
PokémonRB TileArn.png
PokémonRB TileShop.png
PokémonRB TilePoké.png
German
PokémonRB TileArn.png
PokémonRB TileMrkt.png
PokémonRB TilePoké.png
Spanish
PokémonRB TileGim.png
PokémonRB TileShop.png
PokémonRB TilePoké.png
Italian
PokémonRB TileGym.png
PokémonRB TileMrkt.png
PokémonRB TilePoké.png

Hidden Items

These four hidden items were moved between Red and Green and Blue, with these changes being retained for the international versions:

  • Copycat's bedroom: The Nugget was moved from the bed to the desk. This item was also fixed as it was not properly detected by the Itemfinder, could be prevented from being collected, and could be infinity collected.
  • 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 Elixir 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 while 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

In the original Japanese releases, certain moves such as Thunderbolt, Body Slam, or Hyper Beam will result in more rapid screen flashes than in the localized versions. This change was more than likely done to prevent the risk of triggering seizures, a change likely motivated by the infamous episode from the Pokémon anime "でんのうせんしポリゴン" (Dennō Senshi Porygon, or literally "Electric 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 Body Slam.png Pokemon Blue Body Slam.png
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 8 to 12 in the localizations due to the maximum number of Pokémon per Box being dropped from 30 to 20.

MissingNo.

In the Japanese Red and 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").

Substitute

In the Japanese Red, Green, Blue, and Yellow, the moves Absorb, Mega Drain, Leech Life and Dream Eater will fail if the enemy Pokémon has a substitute. This behavior was changed for the English version and all subsequent localized versions, though it would later reappear in all versions of Pokémon Gold, Silver, and Crystal, as well as Pokémon Stadium before being 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).

Virtual Console Revisions

Connectivity

When bought over to the Virtual Console, Red and Blue received a few changes, which consist of:

  • When initiating a link, the Cable Club attendant's dialogue is replaced by the Virtual Console's menu on the touch screen.
  • The PokéTransporter was also updated, allowing player to send their Pokémon to the Pokémon Bank, and from there to transfer them to the Generation VII core series games.

Move Animations

The following move animations were changed also 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)

Glitches

Japanese Only

Empty Party Potion Glitch

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

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.

Closed Menu Select Button Glitch

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 1" of Red and Green 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 and Green Rev 1 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.

(Source: ChickasaurusGL)

Sabrina Glitch

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

(Source: ChickasaurusGL)

Cliff Glitch

In the 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.

(Source: ChickasaurusGL)

Seafoam Islands Blank Text Box Glitch

In the 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.
(Source: ChickasaurusGL)

Swift Glitch

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.

Partial Trapping Move Glitch

This is a very odd bug that seemingly only happens in the "Rev 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 is defeated via damage from a burn or poison, both Pokémon will faint. This doesn't happen the other way around (i.e. if 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 which can cause glitch Pokémon to appear on either player's side.

Special Menu Select Button Glitch

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.

(Source: ChickasaurusGL)

International Only

Instant Text Glitch

If you talk to the Bike Shop owner in Cerulean City without having the Bike Voucher in your inventory and use B to back out of the menu that tries to sell you a bicycle for P$1,000,000, all subsequent text that appears in the game will appear instantly instead of scrolling in as usual.

This bug was introduced with the localizations; it did not occur in the Japanese versions of the game and was fixed for Yellow.

Brock-Skipping Glitch

In 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 the European releases.

Japanese / International

Oak's Parcel Glitch

In the Japanese releases, as well as all versions of Yellow, 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.

Viridian Old Man Glitch

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.

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.

Much amusingly, this bug made a return in all versions of Gold, Silver and Crystal: If your Pokémon roster and the currently active PC Box are both full when attempting to watch the Dude's Pokémon catching tutorial, memory corruption will ensue.