Dr. Crowler

Dr. Crowler (voiced by Sean Schemmel) is a character from Yu-Gi-Oh GX. He's a professor from Duel Academy.

He disliked Jaden for beating him in the exams, so he tried to get him expelled. But this eventually changed when the Shadow Riders arrived. Dr. Crowler proved his courage in a duel with Camula, but he was defeated and lost his soul. He was restored after Jaden defeated Camula.