From Bulbapedia, the community-driven Pokémon encyclopedia.
He is based on the protagonists of the main series Pokémon games.
He shares his Japanese name—which can be taken to mean "wisdom" or "reason" (智)—with the creator of the Pokémon franchise, Satoshi Tajiri. His English surname is a pun of the original English motto, "Gotta catch 'em all!."
In the anime
Currently in party
With Professor Oak
Heart Gold Chapter
Hoenn Battle Frontier
Sinnoh Battle Frontier