Glitch item
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 | Serial interrupt ACE | Pikachu glitch emote | Generation III glitch Pokémon summary | Generation III glitch move animation) | Remote code execution | TM/HMs outside of the TM/HM pocket | Type 0xFF mail arbitrary code execution (Japanese Crystal) | ZZAZZ glitch Trainer FC
List of arbitrary code execution programs
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
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)
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)
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
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))
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
Pomeg glitch (Generation III)
Pomeg data corruption glitch ("Glitzer Popping") | Charm glitch
Voiding (Generation IV)
Broken escalator glitch (Japan only) | Elite Four door glitch (Japan only)
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
Safari Zone exit glitch | RAM manipulation | Out of bounds Glitch City (Generation II) | Slowpoke Well out of bounds corruption (French Gold/Silver/Crystal)
Large storage box byte shift glitch
Storage box remaining HP glitch | Generation I max stat trick
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
Death-warp | Ditto trick | Experience underflow glitch | Mew trick | Text box ID matching | Meta-map script activation
Ledge method | Museum guy method | Rival's effect | Select glitch method (International Select glitch method), Brock Through Walls
Grass/rock Surfing glitch (Spanish/Italian only) (adaptions: Submerge glitch (international)) | 8 8 (0x7C) grass/rock surfing glitch (English Red/Blue))
Glitch items are invalid items in the Pokémon games. Unavailable items such as Pokémon FireRed and LeafGreen key items in Pokémon Emerald may also be considered to be glitch items, as well as unused/unavailable items such as ????? (hex:07) and BoulderBadge (hex:15) — see unused items.
Glitch items may have special uses (in Generations I and II), different names (in Generation I and to an extent Generation II) and Poké Mart buy and sell price data.
Some glitch items such as "9F" (hex:5E) in Pokémon Red and Blue or Pokémon Yellow, or "RIVAL'S" (hex: A2) in Red and Blue, or "o" (hex:94) in Yellow always have the same use(s).
Other glitch items execute data in writable memory, with a select few glitch items such as such as "8F" in Pokémon Red and Blue (hex:5D) and "ws m" in Pokémon Yellow (hex:63) being ideal for arbitrary code execution.
In Pokémon Red, Green, Blue, and Yellow
Glitch items occupy index numbers hex:00, hex:54 through to hex:C3 and hex:FB through to hex:FF.
Types of glitch items:
- Unterminated name glitch items: These are items without a 0x50 byte in the first 20 characters of their name. They can be used for various buffer overflow techniques with specific tiles on the screen. When the A-Button is pressed on them without a 0x50 sub-tile present on the screen, it is most likely the game will freeze.
- Lag name glitch items: These cause the items list to temporary freeze until the player taps A or B a specific number of times while scrolling up/down. It is advised to tap B instead of A due to the risk of a game freeze from an unterminated name glitch item, which could freeze the game, and potentially destroy the save data, especially on Nintendo 3DS Virtual Console versions.
- Rival's effect glitch items: These glitch items are capable of causing the Rival's effect; an effect that opens a menu and allows the player to walk through impassable tiles once it is closed with B.
- Partial escape glitch items: These allow for the player to partially escape from a wild battle, or restart a Trainer battle.
- Screen data saving glitch items: These allow for the player to create a copy of the screen while the items menu is open, which is useful for Rival LOL glitch or a similar glitch.
- String printing glitch items: These may include a variable string in the item's name.
- Arbitrary code execution glitch items: These glitch items do not have hard coded effects; instead the effects are sourced from a pointer in rewritable memory, such as RAM. Depending on the source pointer, it is possible to manipulate the item to do almost anything in game. 8F (0x5D) and ws m (0x63) are infamous examples in the English versions.
- RAM name glitch items: These are not known to exist in the English versions, but an example is ItemDexJP/B:000 from Pokémon Blue (Japanese).
How to obtain glitch items:
All glitch items:
- Dry underflow glitch or original item underflow glitch>Celadon looping map glitch
- Glitch City RAM manipulation (Cut abuse): For expanded PC items
- Other expanded items pack glitches; namely, Super Glitch, 255 Pokémon glitch, ZZAZZ glitch and more
Some glitch items:
- Get glitch items using left-facing shore tile glitch (Red/Blue)
- Get glitch items using Trainer escape glitch (Yellow)
- Glitch City RAM manipulation (buffer overflow techniques): For move 0x00 corruption
Many glitch items are available with the Celadon looping map trick, Item creation glitch (a Select glitch in Red/Green/Blue), Yami Shop glitch and other Poké Mart vendor glitches.
Examples of particularly useful glitch items include:
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In Pokémon Gold, Silver and Crystal
Glitch items in Pokémon Gold, Silver and Crystal occupy a number of index numbers, as such:
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Note that Teru-Sama items which are not Teru-Sama in Crystal are the key items "Clear Bell" (hex:46), "GS Ball" (hex:73), "Blue Card" (hex:74) and "Egg Ticket" (hex:81) respectively.
TMs and HMs outside of the correct pocket
Main article: Wrong pocket TMs and HMs
In addition to the regular glitch items in Gold, Silver, Crystal, all of the normal TMs and HMs will serve as glitch items when used outside of the TM/HM pack, due to having invalid execution pointers.
Below are a number of useful TMs and HMs to use outside of the relevant pocket.
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In Pokémon Ruby, Sapphire and Emerald, Pokémon FireRed and LeafGreen
There are many glitch items in these games named "????????" with no apparent use other than for arbitrary code execution setup. The hex:FFFF "????????" can be distinguished for having the 'return to menu' sprite as its sprite.
These items are available through a double corruption with the Pomeg corruption glitch to force a Pokémon holding one. It is also possible to obtain a ???????? with the Mail and Trick glitches in Japanese Pokémon Ruby and Sapphire.
One way of obtaining them with the Pomeg corruption glitch is through corrupting the in-game trade Pokémon DOTS the Seedot with Defense and Speed EVs spelling out the index number of the desired items with at least 1 HP EV (so it isn't corrupted into an empty space).
In Pokémon Diamond, Pearl and Platinum, Pokémon HeartGold and SoulSilver
These games feature a hex:0000 glitch item which is referred to as "None" when forced as a Poké Mart gift. There are also glitch items with index numbers between hex:0071 and hex:0086, and a large number of other glitch items which may be nameless.