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VRAM inaccessibility

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VRAM inaccessibility is a phenomenon that occurs in Game Boy games.

Due to the fact that VRAM can only be read or written to at specific periods of time, attempting to read the data there may result in data substituted with 0xFF bytes, and how much of the data is read is difficult to predict as it depends on precise timing.

Some of the glitches VRAM inaccessibility is relevant for include arbitrary learnset/evolution glitch Pokémon and glitch type names.

See also

  • Chaotic name

  • Detailed explanation by TheZZAZZGlitch

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