Glitch item

List of arbitrary code execution programs

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Major glitches of the Pokémon series

Arbitrary code execution

No further extensions

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

Buffer overflow techniques

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)

Closed menu Select glitches (Japanese Red/Green)

Pomeg glitch (Generation III)

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

Voiding (Generation IV)

Tweaking

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

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)

Large storage box byte shift glitch

Storage box remaining HP glitch | Generation I max stat trick

Pikachu off-screen glitch

Trainer corruption glitch

SRAM glitches

Trainer escape glitch

Walk through walls

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

Surf down glitch

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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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.

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:

Name	Index number (hexadecimal)	Index number (decimal)	Game	Uses
j.	00	0	Pokémon Red and Blue	One of the most common glitch items, which can be sold for a high price of 414925 Pokédollars.
#×##	00	0	Pokémon Yellow	One of the most common glitch items, which can be sold for a high price of 414925 Pokédollars.
CascadeBadge	16	22	Pokémon Red, Blue, Yellow	Throw a rock and double a wild Pokémon's catch rate.
4F	59	89	Pokémon Red, Blue, Yellow	Arbitrary code execution (initially runs FA65 in the Echo RAM region, equivalent to DA65 in Day Care data)
５かい	5A	90	Pokémon Red, Green, Blue (Japanese)	Arbitrary code execution (initially runs D123; Pokémon data)
8F	5D	93	Pokémon Red and Blue	Arbitrary code execution (initially runs D163; Pokémon data)
9F	5E	94	Pokémon Yellow	Reload a map and bring graphics back to normal after a Super Glitch induced Glitch City.
9F	5E	94	Pokémon Red and Blue	Restart a Trainer battle. Partially escape from a wild battle (useful for LOL glitch). Overflowing the stack.
かいがらバッヂ (Shell Badge)	63	99	Pokémon Yellow (Japanese)	Arbitrary code execution (initially runs D9B2; stored Pokémon data).
ws m	63	99	Pokémon Yellow	Arbitrary code execution (initially runs DA7F; stored Pokémon data).
はやぶさバッヂ (FalconBadge)	65	101	Pokémon Yellow (Japanese, v1.1+)	Causes arbitrary code execution at 0xD4CA (ninth PC item).
なかよしバッヂ (FriendBadge)	67	103	Pokémon Red, Green, and Pokémon Blue (Japanese)	Arbitrary code execution (initially runs D983, number of Safari Balls and the Day Care data, stored Pokémon data which follows. A special Day Care Pokémon name can be used to redirect the code directly to a location of the player's choice, otherwise if there is no Safari Ball/Day Care data, stored Pokémon data can be used like English Yellow's ws m and English Red/Blue's -g m.
ゴールドバッヂ (GoldBadge)	6A	106	Pokémon Red and Green (Japanese, v1.0)	May act as a Poké Mart with 240 items. Can be used to buy Rare Candies (with specific data in RAM) and Master Balls.
ゴールドバッヂ (GoldBadge)	6A	106	Pokémon Yellow (Japanese, v1.1+)	Acts as a Pokémon Center nurse.
-g m	6A	106	Pokémon Yellow	Restart a Trainer battle. Partially escape from a wild battle (useful for LOL glitch)
-g m	6A	106	Pokémon Red and Blue	Arbitrary code execution (initially runs DA47; in which Safari Zone data and Day Care data follows. If this is blank; code will 'fall through' to DA80; stored Pokémon data).
Lg-	6E	110	Pokémon Yellow	Restart a Trainer battle. Partially escape from a wild battle (useful for LOL glitch). Make walking Pikachu stay (useful for Pikachu off-screen glitch).
?????	07	07	Pokémon Red, Blue, Yellow	Acts outside of battle like using the field move Surf. Can also be used to change to the wrong music bank inside of a battle if used in a battle facing water.
(blank)	78	120	Pokémon Red and Blue	Restart the music. Change to an overworld (02, 1F) sound bank from the sound bank (08). Play the music with ID at D35B with bank at D35C (D35B, D35C can be manipulated with expanded items pack).
てへ	7B	123	Pokémon Red and Green	Arbitrary code execution (initially runs D806; wild Pokémon data or temporary player name storage for the old man battle) and an unterminated name glitch item.
えﾞ円にグぅ4えやけぼ	7B	123	Pokémon Blue (Japanese)	Unterminated name glitch item in Red/Green v1.1. Arbitrary code execution (initially runs D806; wild Pokémon data or temporary player name storage for the old man battle).
♀へん	7C	124	Pokémon Yellow (Japanese, v1.0)	Steal other Trainer's Pokémon.
8 8	7C	124	Pokémon Red and Blue	Create encounter chains from a Trainer escape glitch encounter by using it when the menu pops up in a specific map. Must be used indirectly via unterminated name glitch item, or in combination with a unterminated name glitch item, to avoid a freeze when CFC4 is odd.
PC	80	128	Pokémon Red and Blue	Unterminated name lagless glitch item (useful for LOL glitch). Hex:00 item effect freeze.
2pゥ	92	146	Pokémon Yellow	Unterminated name lagless glitch item (useful for LOL glitch). Acts as an Ultra Ball.
o	94	148	Pokémon Yellow	Activate the Rival's effect. Otherwise if used on a Pokémon may act like a Lemonade.
RIVAL'S	A2	164	Pokémon Red and Blue	Activate the Rival's effect. Otherwise if used on a Pokémon may acts like an item with no noticeable effect.

In Pokémon Gold, Silver and Crystal

Glitch items in Pokémon Gold, Silver and Crystal occupy a number of index numbers, as such:

Hex ID	Dec ID	Item
00	0	?
06, 19, 2D, 32, 38, 46 (G/S only), 5A, 64, 73 (G/S only), 74 (G/S only), 78, 81 (G/S only), 87, 88, 89, 8D, 8E, 91, 93, 94, 95, 99, 9A, 9B, A2, AB, B0, B3, BE	5, 19, 45, 32, 38, 46 (G/S only), 90, 100, 115 (G/S only), 116 (G/S only), 120 (G/S only), 129 (G/S only), 135, 136, 137, 141, 142, 145, 147, 148, 149, 153, 154, 155, 162, 171, 176, 179, 190	Teru-Sama
C3	195	TM04 (useless)
DC	220	TM28 (useless)
FA	250	HM08 (Generation II glitch item)
FB	251	HM09 (Generation II glitch item)
FC	252	HM10 (Generation II glitch item)
FD	253	HM11 (Generation II glitch item)
FE	254	HM12 (Generation II glitch item)
FF	255	HM13/CANCEL/Berry

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

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.

(Sources: [1], [2], [3])

Hex ID	Dec ID	Item	Version	Use
CE	206	TM15	Crystal (Japanese)	Executes arbitrary code from FA10 (Echo RAM for DA10, which is somewhere in the expanded Balls pocket. If "(item) x195", "Star Piece x 252" (represents C3 84 FB - a jump to FB84, box 4 name character 2) are stored at DA0F, then this will serve as a bootstrap code to stored box Pokémon names.
CE	206	TM15	Crystal (English)	Executes arbitrary code from FA10 (Echo RAM for DA10, which is somewhere in the expanded Balls pocket.
D0	208	TM17	Crystal (English)	Executes arbitrary code from FA47 (Echo RAM for DA47, which is somewhere in the expanded Balls pocket.
D0	208	TM17	Gold/Silver (English)	Executes arbitrary code from FA47 (Echo RAM for DA47, which is the caught data for party Pokémon 1. The player can make a jump to somewhere more useful (via C3 yy xx), using Pokémon 1 as a slide Pokémon if necessary.
D4	212	TM21	Crystal (English)	Executes arbitrary code from FA69 (Echo RAM for DA69, which is somewhere in the expanded Balls pocket; like TM21.
D8	216	TM25	Crystal (English)	Executes arbitrary code from FA69 (Echo RAM for DA69, which is somewhere in the expanded Balls pocket; like TM25.
D8	216	TM25	Gold/Silver (English)	Executes arbitrary code from FA6A (Echo RAM for DA6A, and DA6A is the least significant Defense EV byte of the second Pokémon in the party. The Speed EVs word follows, and the player can make a jump to somewhere more useful (via C3 yy xx). This may be possible without trading, but getting the exact EVs would be tedious and it would be hard to keep track of them without a memory viewer. Through arbitrary code execution in Pokémon Red, Blue, and Yellow, the second Pokémon may be manipulated to have Defense and Speed EV values that the player desires.
E1	225	TM33	Crystal (English)	Executes arbitrary code from F418 in Echo RAM (essentially D418); the third character of the fifth enemy Pokémon's nickname. Through arbitrary code execution in Pokémon Red, Blue, and Yellow, the player may rename this Pokémon to include a jump instruction (e.g. to C3 F2 D8 bytes which reads jp D8F2, i.e. jumps to the first item in the item storage system).
EF	239	TM47	Gold/Silver (English)	Allows the player to offset their position on the map, as documented here.

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.

External links

Link to the ItemDex item database.