Kiyo is a character who appeared in the games and anime. He was also Character of the Day in JE117. He specializes in Fighting-types, with him being the former Gym Leader of Saffron City - operating out of the former Saffron City Gym, currently referred to as the Fighting Dojo. He is named Koichi in Generation III.
He studied under Chuck's teachings. Once, he encountered a Tyrouge abandoned by its trainer and tried to befriend it, but Tyrouge just kept getting into more and more trouble. Kiyo gained an opportunity and fought with Tyrouge in a hand-to-hand battle and won. Tyrouge gained respect and became its friend.