Stuart Stone

 (born Stuart Eisenstein on November 17, 1980) is a Canadian film, television, and voice-over actor as well as a producer of television, film, and music. He is best known for voicing Ralphie in The Magic School Bus. In addition, Stone voiced Hip Koopa in both The Adventures of Super Mario Bros. 3 and Super Mario World, a role previously believed to be done by Tara Strong. He also voiced various one-time characters such as Bud and Junior.