Jimmy Neutron as Speed Racer
Hugh Neutron as Pops Racer
Judy Neutron as Mom Racer
Car Wheezer as Spritle Racer
Sir Topham Hatt as Inspector Detector
Sheen Estevez as Rex Racer
Spongebob Squarepants as Taejo Togokahn
Mr. Carborettor as Arnold Royalton
Mr. Grumble as Cruncher Block
Trophy as Jack "Cannonball" Taylor