Roy Koopa is one of the Koopalings in Super Mario Bros
Roy Koopa played Bert in Po/Thomas and Friends shorts
He is a diesel.
Roy Koopa played Buford in Totodile and Petrie (Phineas and Ferb)
He bullies people.
He is an onion
Roy Koopa played Pete in The Little Bakugan that Could
He is freight engine.