Psychic is one of 18 Pokemon types. The psychic Pokemon are usually associated with some of the highest Special Attack IV stats, considering most psychic attack moves are special, as well as fairly low Defense stats. Psychic Pokemon are notorious in the Generation I of the official Pokemon Series for being overpowered because their only weakness, Bug, only had a couple of attack moves. However, Gamefreak fixed this with the release of Generation II.
Notable Psychic-type Pokemon trainers are: Lucian of the Elite Four in D/P/P; Sabrina, the Saffron City gym leader in HG/SS; Will of the Elite Four in HG/SS; and Caitlin of the Elite Four in B/W, B2/W2.