Unown

Unown (アンノーン Unknown) is a -type Pokémon introduced in Generation II.

Physical Appearance
Unown is a hieroglyph Pokémon. There are Unowns for each letter of the English alphabet, as well as exclamation points and question marks (as of Generation III). Unowns are shaped like its letter, except it has an eye somewhere in the letter.

Attacks
The only Attack Unown can learn is Hidden Power unless a cheat or hack is used.