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????? map corruption
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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))

(view, talk, edit)

????? map corruption, also known as "Missingning" is a glitch technique in Pokémon Gold, Silver and Crystal documented by Paco81, the discoverer of the bad clone glitch.

Viewing the summary of specific ????? in specific versions allows the player to cause map corruption, due to the Pokémon having a type with a name that is very long.

????? are obtainable through the bad clone glitch or Coin Case arbitrary code execution. If the bad clone glitch is used the player should initially receive a hex:00 ?????.

It can be converted into a hex:FF ????? after being taken into the Day Care and out again if moved to the top of the party with a party of six Pokémon and the "move PkMn w/o Mail" option is used to move a seventh Pokémon to the top of the party, which moves the hex:00/hex:FF ????? hybrid to the second slot of the party.

Applicable ?????

  • ????? (FF) - Pokémon Crystal JP.
  • ????? (00) - Pokémon Crystal EN (type hex:50).
  • ????? (00) - Pokémon Crystal ES — freezes believed to be less frequent than on the English version.
YouTube video by Pacoo81

Hex:FF ????? items and TM/HM pocket corruption in Japanese Crystal

The spot to secure a warp to the Bug-Catching Contest with the items and TM/HM pocket corrupted.

If the player views the summary of an hex:FF ????? at the specific spot in a Japanese version of Crystal, they may receive an announcement that the Bug-Catching Contest has ended (even if it was never started) and be warped to the results room.

Many items in the player's bag may become corrupted and the player may receive an expanded items pocket every TM/HM in the TM/HM pocket. From the corrupted pockets, an expanded Balls pocket can be obtained in which stored PC items can be used.

Hence having a TM/HM deposited is a gateway to arbitrary code execution, since TM/HM moves have invalid execution pointers when used outside of the items pack.

In particular, TM15 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.

(Youtube video of a Japanese Crystal TAS by ChickasaurusGL using hex:FF ????? to beat the game).

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