Unown

Unown (Japanese: アンノーン Unknown) is a Psychic-type Pokémon.

While it is not known to evolve into or from any other Pokémon, as of Generation III, Unown has 28 derivative shapes, chronicled in the Unown Dex in Generation II and the Unown Report in HeartGold and SoulSilver. There are 26 Latin alphabet characters, plus ? (question mark) and ! (exclamation mark) introduced in Generation III. In Generation II, its shape is determined by its individual values; in Generation III, it is determined by its personality value; from Generation IV onward, it is determined by a separate form identifier.