Wild appeared!

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Miscellaneous glitches of Pokémon Red and Blue and Pokémon Yellow

Amazing Man (Red and Blue only) | Cable Club escape glitch | Celadon looping map trick | Champion Blue music muting glitch | Coastal Flooding | Confusion and Substitute glitch | Cooltrainer move | Cycling based glitch maps | Escape sprite handling glitch | Evolve without an evolutionary stone (Red and Blue only) | Evolving Raichu (Red and Blue only) | Expanded item pack | Expanded Pokédex | Focus Energy glitch | Get stuck in a wall | Ghost Bicycle glitch | Glitch encounter system | Glitch City RAM Manipulation | Infinite Blaine Door | Introduction Nidorino glitch (Red and Blue only) | Invisible PCs (Red and Blue only) | Invisible tree glitch | Item stack duplication glitch | Mute the music in the Pokémon League | Partial trapping move link battle glitch | Pokémon Tower Pokédex glitch | PP underflow glitches | Recovery move glitch | Rival's effect | See a Ghost without a Silph Scope | Selfdestruct and Substitute glitch | Silph Co. PC Glitch | Slot machine glitch | Stand on a tree | Statue behavior glitch (Red and Blue only) | Super effective move AI flaw (Red and Blue only) | Super Glitch | Surf down glitch | Swift miss glitch | Transform assumption glitch | Transform Empty Move Glitch | Trick Zone | Vending machine purchase glitch | Walk around with only fainted Pokémon (Red and Blue only) | Walking lag glitch | Walk on water through Surf | Walking Pikachu happiness glitch (Yellow only) | Wild appeared! | ZZAZZ Glitch

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"Wild appeared!" is the result of when the player enters battle with zero or a specific number of Pokémon over 6 in Pokémon Red, Blue, and Yellow. The name originates from what text the game displays when the battle starts, though what it exactly shows has more spaces between "Wild" and "appeared!".

This glitch occurs due to a buffer overflow caused by the game attempting to write 'Poké Balls in belt' graphics data (buffer at $CEE9) for Pokémon beyond slot 6. The possible values are usually always one of the following.

$31 - No status ailment

$32 - Status ailment

$33 - Fainted

$34 - Empty

A more detailed explanation can be found on this forums post by TheZZAZZGlitch.


53+ Pokémon: Screen changes colour before players sends out their Pokémon

222+ Pokémon: Replaces the music with a sound and usually causes it to stop due to the corruption of the memory address CFC7 (CFC6 in Yellow).

220+ Pokémon: Makes the game freeze in Red and Blue after battle if CFC4 becomes an odd value (see CFC4 freeze). But no freeze occurs in Yellow.

239+ Pokémon: 'Mutate' the enemy Pokémon into either Golem, Missingno. (hex:32), Magmar, or Missingno. (hex:33).

Note: All above effects occur for 0 Pokémon (as this is interpreted by the game as 256 Pokémon).

YouTube video

YouTube video by ChickasaurusGL

See also

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