The Unown are a species of Pokemon introduced back in Pokemon Gold/Silver. They're a pure Psychic-type that are capable of using only one move and cannot evolve. These Pokemon are based on all 26 letters of the Latin alphabet, with Generation 3 adding Unown ? and Unown ! to the roster, making a total of 28 Unown. Pokemon Legends: Arceus includes the Unown in the Hisui region by locking them behind an optional, in-game sidequest.