• English / United States: Seymour
• Japanese / Japan: リカオ
• Japanese (Romanized) / Japan: Rikao
• Japanese (TL) / Japan: Rikao
• French / France: Seymour

Seymour is a scientist that investigated why Pokémon were behaving strangely on Mt. Moon. After discovering Team Rocket was behind it, they were sent blasting off. There, Seymour and the others befriended a Clefairy.Seymour had a theory that they came from space via shuttle. When the gang witnessed some Clefairy evolve into Clefable, Seymour decided to live on Mt. Moon to do further research.