From Bulbapedia, the community-driven Pokémon encyclopedia.
Travis (Japanese: コウジ Kōji) is the son of Luana, the Gym Leader of Kumquat Island and the fourth member of the Orange Crew. He left his home to become a Pokémon Master.
Travis is a character of the day and doppelgänger of Ash and Arnold, at least according to Luana. He is also similar to Ash in that he started his journey with a Pikachu. Little else is known about Travis, as he only appeared in a flashback and received no speaking lines.
This listing is of Travis' known Pokémon: