Unown is a hieroglyph Pokémon. There are Unowns for each letter of the alphabet, as well as exclamation points and question marks. Unowns are shaped like its letter, except it has an eye somewhere in the letter.
Its flat, thin body is always stuck on walls. This Pokémon is shaped like ancient writing. It is a mystery as to which came first, the ancient writings or the various Unown. Research into this topic is ongoing but nothing is known. When alone, nothing happens. However, if there are two or more, an odd power is said to emerge. They seem to communicate among each other telepathically. Because different types of Unown exist, it is said that they must have a variety of abilities. [link]