Pokémon sprite corruptions (Generation I)

The walking characters effect is a glitch in Pokémon Red, Green, Blue, and Yellow, which is caused by some glitch Pokémon.

While this effect is active, NPCs will appear and walk in a pattern on the screen.

This glitch is typically due to a Pokémon's problematic sprite, and is most known for applying to regular MissingNo. in English Pokémon Yellow, however some other glitch Pokémon can cause it as well.

Other effects

The sprite corruption may also lead to corruption of the sound, including which notes are playing and the sound bank.

The walking characters effect can also be used to trigger facing direction arbitrary code execution through the corruption of memory address C109, after using Lg- (hex:6E).

Applicable glitch Pokémon

• MissingNo. (English Yellow non-Fossil/Ghost variants)
• ヅ (0xBF) (Red/Green)
• アネﾞデパミﾞ (0xFF) (Japanese Yellow)

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