Major glitches of the Pokémon series
Arbitrary code execution 
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
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No further extensions 
Cloning | Item duplication glitch (Generation I) | Pokémon merge glitch ("Q Glitch", Generation I) | Time Capsule exploit | Bug-Catching Contest data copy glitch (Generation II, Japan only) | Berry glitch | Battle Tower Lati@s glitch (Generation III) | (Mimic) Transform Rage glitch (Generation IV)
Transform held item glitch (Generation IV, Japan only) | Mimic glitch (Generation IV, Japan only)
[hr]
Buffer overflow techniques 
99 item stack glitch | 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)
[hr]
Item stack duplication glitch (Generation I) 
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
[hr]
Bad clone glitch (Generation II) 
????? 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))
[hr]
Closed menu Select glitches (Japanese Red/Green) 
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
[hr]
Pomeg glitch (Generation III) 
Pomeg data corruption glitch ("Glitzer Popping") | Charm glitch
[hr]
Voiding (Generation IV) 
Tweaking
Broken escalator glitch (Japan only) | Elite Four door glitch (Japan only)
[hr]
2x2 block encounter glitches (Generation I) 
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
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Glitch City 
Safari Zone exit glitch | RAM manipulation | Out of bounds Glitch City (Generation II) | Slowpoke Well out of bounds corruption (French Gold/Silver/Crystal)
[hr]
Large storage box byte shift glitch 
Storage box remaining HP glitch | Generation I max stat trick
[hr]
Pikachu off-screen glitch 
Trainer corruption glitch
[hr]
SRAM glitches 
Generation I save corruption | 255 Pokémon glitch | Expanded party encounter table manipulation (Generation I) | Send party Pokémon to a new game (Generation I) | Generation II save corruption | Mailbox glitches | Mystery Gift item corruption | Trainer House glitches
[hr]
Trainer escape glitch 
Death-warp | Ditto trick | Experience underflow glitch | Mew trick | Text box ID matching | Meta-map script activation
[hr]
Walk through walls 
Ledge method | Museum guy method | Rival's effect | Select glitch method (International Select glitch method), Brock Through Walls
[hr]
Surf down glitch 
Grass/rock Surfing glitch (Spanish/Italian only) (adaptions: Submerge glitch (international)) | 8 8 (0x7C) grass/rock surfing glitch (English Red/Blue))
(view, talk, edit)


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
[hr]


Cloning | Item duplication glitch (Generation I) | Pokémon merge glitch ("Q Glitch", Generation I) | Time Capsule exploit | Bug-Catching Contest data copy glitch (Generation II, Japan only) | Berry glitch | Battle Tower Lati@s glitch (Generation III) | (Mimic) Transform Rage glitch (Generation IV)
Transform held item glitch (Generation IV, Japan only) | Mimic glitch (Generation IV, Japan only)
[hr]


99 item stack glitch | 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)
[hr]


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
[hr]


????? 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))
[hr]


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
[hr]


Pomeg data corruption glitch ("Glitzer Popping") | Charm glitch
[hr]


Tweaking
Broken escalator glitch (Japan only) | Elite Four door glitch (Japan only)
[hr]


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
[hr]


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


Storage box remaining HP glitch | Generation I max stat trick
[hr]


Trainer corruption glitch
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Generation I save corruption | 255 Pokémon glitch | Expanded party encounter table manipulation (Generation I) | Send party Pokémon to a new game (Generation I) | Generation II save corruption | Mailbox glitches | Mystery Gift item corruption | Trainer House glitches
[hr]


Death-warp | Ditto trick | Experience underflow glitch | Mew trick | Text box ID matching | Meta-map script activation
[hr]


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


Grass/rock Surfing glitch (Spanish/Italian only) (adaptions: Submerge glitch (international)) | 8 8 (0x7C) grass/rock surfing glitch (English Red/Blue))
(view, talk, edit)
Select glitches in Japanese Pokémon Red, Green and Blue
Battle disabling Select glitch | Badge describer glitch | Dokokashira door glitch | Fossil conversion glitch | Item creation glitch | Lift glitch | Partial switch glitch (Red/Green v1.0 only) | Remaining PP into species Select glitch | Second type glitch | Skip to Level 100 glitch | Trainer mutation glitch | Walk through walls | Warp by Nidoran♂ glitch
(view, talk, edit)
Battle disabling Select glitch | Badge describer glitch | Dokokashira door glitch | Fossil conversion glitch | Item creation glitch | Lift glitch | Partial switch glitch (Red/Green v1.0 only) | Remaining PP into species Select glitch | Second type glitch | Skip to Level 100 glitch | Trainer mutation glitch | Walk through walls | Warp by Nidoran♂ glitch
(view, talk, edit)
Please note that this glitch only exists in the Japanese versions of the game, or is otherwise a glitch![]() |
This glitch was fixed in Pocket Monsters Pikachu and all overseas versions of Pokémon Red, Blue, and Yellow.
Select glitches may be used by players to obtain specific items, moves, Pokémon, fight special Trainers, warp to different locations and so on, and the dokokashira door glitch (which allows the player to warp to the Hall of Fame) is an example of a Select glitch popular in tool-assisted speedruns of Pocket Monsters Red, Green (and Blue).
Uses and variations of the Select glitch include:
Closed menu Select glitch (Examples: dokokashira door glitch, fossil conversion glitch, Trainer mutation glitch). Special menu Select glitch (Examples: Cerulean City badge man entry swapping, Silph Co. elevator entry swapping).
Select glitches to obtain items (item creation glitch) may be useful for setting up arbitrary code execution. Swapping a Pokémon in an expanded party (which is also possible in the localizations through Super Glitch, 255 Pokémon glitch) may also have the same effect as performing a closed menu item menu>Pokémon menu Select glitch, although many Select glitches do not work the same on the localizations when 'ported' over.