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Dude full box glitch
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The Dude full box glitch in English Pokémon Crystal

The Dude full box glitch is a natural glitch in Pokémon Silver and Pokémon Crystal, and a glitch that requires another glitch in Pokémon Gold (due to the inaccessibility of a Pokémon that can poison a party Pokémon).

It is triggered when the Dude attempts to catch a Rattata as part of the catching demonstration, but the player's party and current box is full, resulting in glitchy behavior after the player receives a message that the Poké Ball cannot be used, as the box is full.


Under 'normal' circumstances, it is not possible for the player to have a full party and full box the first time they see the Dude, however this problem can be worked around by whiting out from poison (using a Weedle on Route 30, which is available in Silver and Crystal during the morning or day), after getting the Pokédex and before walking to Route 29.

While talking to the Dude without him walking up to the player is normally impossible with a full party and full box (due to the "POKéMON hide in tall grass. Who knows when they'll pop out..." message appearing with a full party and full box), the game does not restrict the player from watching the Dude's demonstration if he approaches the player on the route's 'boundary line' (in between Route 29 and New Bark Town).

In English Silver

The game does not freeze, but the HUD is loaded. This allows the player to see briefly a Level 0 male ????? on the user's side with 0/0 HP. Afterwards the demonstration ends, and the player is returned to the overworld.

In Korean Silver

Misaligned player character in the Korean Silver

The game does not freeze, but the HUD may be loaded for a ????? with a corrupted name. The battle may end with the player erroneously misaligned on the screen (however the disposition may be difficult to notice at first).

This behavior has only been confirmed on BGB emulator and has not been tested on cartridge or Virtual Console releases.

In English Crystal

The game may freeze with heavy graphics and sound corruption

In French Crystal

The graphics may become corrupted and the game may freeze due to an invalid opcode at FF40 (0xE3) in the I/O region.

In German Crystal

Exclusively to cartridge versions, the Dude may give the player a large amount of money after the full box message, which is over the maximum amount of 999,999 Pokédollars if the player saves and resets the game.

This exploit does not seem to work in the Virtual Console release, where it may instead result in a game freeze or similar behavior.

YouTube video by ChickasaurusGL

In Italian Crystal

A ????? can be seen on the user's side, and the palette of the screen may be corrupted. "???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????AMICOROSSO -SERCOR?POKé BALL, 4BÉÉ" may appear on the screen (possibly in the region of the user's Pokémon's nickname) and this text may repeat until the game resets with the "Questa cassetta di gioco si può usare soltanto con il Game Boy Color." message.

In Japanese Crystal

  • Graphics may become corrupted with the music continuing to play. Game will eventually freeze possibly with the music hanging on a note.

In Spanish Crystal

Both the games graphics and sound may be heavily corrupted, and the game may reset with the "Esta cartucho está diseñado para ser usado únicamente en Game Boy Color." message.


  • Torchickens (ChickasaurusGL): Documentation