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Pokémon cloning (Generation I)
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Major glitches of the Pokémon series


GB.png Arbitrary code execution GB.png

0x1500 control code arbitrary code execution (Crystal) | Cart-swap arbitrary code execution | Generation I custom map script pointer | Generation I invalid meta-map scripts | Generation I item ("8F", "ws m", "-g m", "5かい", "てへ" etc.) | Generation I move ("-", "TM42") | Generation I Trainer escape glitch text boxes | Generation II bad clone | Generation II Burned Tower Silver | Japanese Crystal Pokémon Communication Center SRAM glitches | Coin Case glitch | Generation II glitch Pokédex sortings | Pikachu off-screen glitch ACE | OAM DMA hijacking | Pikachu glitch emote | Generation III glitch Pokémon summary | Generation III glitch move animation) | Remote code execution | TM/HMs outside of the TM/HM pocket | ZZAZZ glitch Trainer FC


Bulbasaur.png No further extensions Bulbasaur.png

Cloning | 99 item stack glitch (Generation I) | Ditto DV manipulation (Generation I) | Meta-map script activation (Generation I) | Expanded party encounter table manipulation (Generation I) | Item duplication glitch (Generation I) | Pokémon merge glitch ("Q Glitch", Generation I) | Bug-Catching Contest data copy glitch (Generation II, Japan only) | Time Capsule exploit | Berry glitch | Battle Tower Lati@s glitch (Generation III) | (Mimic) Transform Rage glitch (Generation IV) | Tweaking

Elite Four door glitch (Generation IV, Japan only) | Transform held item glitch (Generation IV, Japan only) | Mimic glitch (Generation IV, Japan only)


Bruno.png Buffer overflow techniques Bruno.png

LOL glitch | Rival LOL glitch | Instant LOL glitch | RAM LOL glitch | Out of bounds LOL glitch | blockoobLG | Instant encounter infinite chain glitch | LGFly | Super Glitch (Generation I) | Party remaining HP glitch | Super Glitch (Generation III) | Text pointer manipulation mart buffer overflow glitch | CoolTrainer♀-type move | Double distort CoolTrainer♀ corruption | Yami Shop glitch | Party Pokémon box data shift glitch | Unterminated name glitch item instant encounter (Japanese Red/Green)


Ball.png Item stack duplication glitch (Generation I) Ball.png

Generation I expanded items pack (Glitch Rocket HQ maps, Map FE (English and non-English European Yellow) | Map script pointer manipulation (arbitrary code execution | Map script pointer item ball manipulation) | Text pointer manipulation (arbitrary code execution | Item ball manipulation | Mart buffer overflow) | Trainerless instant encounter glitch


PC.png Bad clone glitch (Generation II) PC.png

????? party overloading (Type 0xD0 move glitch | ????? map corruption | Celebi trick | Celebi Egg trick | Shiny Celebi trick | Glitch move map corruption | Overloaded party map corruption | Glitch Unown (Glitch Unown map corruption) | Duplicate key items glitch (Infinite items and item creation, Expanded Balls pocket (Wrong pocket TM/HMs, Glitch Pokédex categories))


Lab pass.png Closed menu Select glitches (Japanese Red/Green) Lab pass.png

Dokokashira door glitch (International) | Fossil conversion glitch (international) | Second type glitch | Skip to Level 100 glitch | Trainer mutation glitch | Walk through walls (International) | Lift glitch | Badge describer glitch


Gromeg berry.png Pomeg glitch (Generation III) Gromeg berry.png

Pomeg data corruption glitch ("Glitzer Popping") | Charm glitch


Lying old man.png 2x2 block encounter glitches (Generation I) Lying old man.png

Left-facing shore tile glitch (in-game trade shore encounter trick, Old man trick, Trade link up shore encounter trick, Fight Safari Zone Pokémon trick) | Viridian Forest no encounter grass tiles glitch


Glitchtile.png Glitch City Glitchtile.png

Safari Zone exit glitch | RAM manipulation | Out of bounds Glitch City (Generation II) | Slowpoke Well out of bounds corruption (French Gold/Silver/Crystal)


RBYPC.png Large storage box byte shift glitch RBYPC.png

Storage box remaining HP glitch | Generation I max stat trick


Pikachu.png Pikachu off-screen glitch Pikachu.png

Trainer corruption glitch


Tereka.png SRAM glitches Tereka.png

Generation I save corruption | 255 Pokémon glitch | Send party Pokémon to a new game (Generation I) | Generation II save corruption | Mailbox glitches | Mystery Gift item corruption | Trainer House glitches


Ditto.png Trainer escape glitch Ditto.png

Death-warp | Ditto trick | Experience underflow glitch | Mew trick


Brock.png Walk through walls Brock.png

Ledge method | Museum guy method | Rival's effect | Select glitch method (International Select glitch method), Brock Through Walls


Surf.png Surf down glitch Surf.png

Grass/rock Surfing glitch (Spanish/Italian only) (adaptions: Submerge glitch (international)) | 8 8 (0x7C) grass/rock surfing glitch (English Red/Blue))

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This article is a summary page for different variations of a glitches, etc. when talked about as a whole.
Collective.png
PRAMA Initiative a également une page sur Pokémon cloning (Generation I).

Pokémon cloning refers to natural glitches which allow the player to keep two copies of the exact same Pokémon. There are two known methods to do this in Pokémon Red, Blue, and Yellow.

Save menu method

This method was documented by Paco81. It is very risky and the save file could be destroyed if the timing when resetting is bad, but works.

Procedure

  • Save the game in front of a Pokémon Center's PC.
  • Deposit a Pokémon into the Pokémon Storage System.
  • Attempt to save the game, but reset the game as soon as the Yes/No box disappears in "Would you like to SAVE the game?" without the text updating.
  • If done correctly, the player will have the same Pokémon in the party and storage system.
YouTube video by Paco81

Cable Club method

Requirements

  • Two cartridges that are both Pokémon Red, Blue, or Yellow Version.
  • The Pokémon to be cloned.
  • A Pokémon to be lost during the process (not on same game as the one to be cloned).

Procedure

  1. Link the two games and go to a Pokémon Center.
  2. Go to the Cable Club and enter the Trade Center.
  3. On one game, trade the Pokémon to be cloned, and on the other, trade the one to be deleted.
  4. On the game originally having the Pokémon to be cloned, reset the game without saving. On the game where that Pokémon now resides, save.

Result

The Pokémon to be cloned should now exist on both games, and the other Pokémon should be overwritten by one of the clones.

How it works

Simply because the game was not saved after the later deleted Pokémon was obtained, the save data still says that the player has the cloned Pokémon. On the other game, it was saved with the cloned Pokémon on it, so then both games have the same Pokémon.

See also