Technically, Bakura is a trainer. In practice, he's an explorer and collector, who wanders around with a cloud of mostly ghost types with him, almost as if he'd never heard of pokeballs. He has, of course, but it's much more fun having as many of his friends as possible around him.

His main team consists of Amane the Mismagius, Annin the Hoppip (who seems to have taken root in his hair), Fuushi the Drifblim (who he promises hasn't taken any children, really!), Zoku the Golbat, Gollum the Sableye and Kage the Banette.

Oddly enough, quite a lot of people who hear him talking with out seeing im first expect him to be someone else and have a pikachu...