The Pokédex number for is #205, which makes this glitch's National Pokédex equivalent to that of Forretress's. When encountered, 's sprite (defined as 9×1 tiles, though the actual size varies as its sprite pointer is in RAM) overflows the decompression buffers and corrupts the parts of the game's memory responsible for sound; as such, it will terminate the battle music and load for a considerable time (longer than MissingNo.) before appearing. can also replace the battle music with never-ending glitchy sounds that don't allow its cry (which is identical to Raticate's) to play, effectively locking up the game.
's Pokédex entry can be bypassed by having seen a Haunter.
When is sent into battle, the player will not be able to see 's moves, as the battle menu will be covered by a black glitch screen, the same one that covers its front sprite.
When appears in color in Pokémon Stadium, 's sprite will be red and surrounded by a black glitch screen.
This glitch Pokémon article is part of Project GlitchDex, a Bulbapedia project that aims to write comprehensive articles on glitches in the Pokémon games.