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Its hexadecimal identifier is 252 or FC in hexadecimal and will change into 4mn when transferred to Pokemon Yellow
Because of the ZZAZZ glitch this Pokémon cannot be obtained by the Mew Trick and a high hexadecimal value also means this Pokémon cannot be obtained through the old man trick as the letter equivalent is invalid.
O has no specific habitat because it was never programmed to be in a specific area, nor was it ever programmed for the player to find it. Since it only exists in Generation I, it must exist in the Kanto region. Its habitat is confirmed to exist in any location where a trainer in the Red/Blue/Yellow versions can be escaped from before being seen (see Mew glitch). Its type suggests it may exist in a watery environment. Theoretically, it could also exist in some Glitch City-like location.
Type effectiveness
Under normal battle conditions in Generation V, this Pokémon is:
This glitch Pokémon article is part of Project GlitchDex, a Bulbapedia project that aims to write comprehensive articles on glitches in the Pokémon games.