• Speed Racer as The Cat in the Hat
  • Young Speed Racer as Mack the Turtle
  • Trixie as Cindy Lou Who
  • Racer X as Sam-I-Am
  • Taejo Togokahn as The Lorax
  • Pops Racer as King Derwin
  • Mom Racer as Joan
  • Rex Racer as Little Cat B
  • Spritle Racer as Terrence McBird
  • Sparky as Little Cat A
  • Kenzie and Willy as Mr. Knox and Fox in Socks
  • Minx as Sarah Hall-Small
  • Inspector Detector as Joey
  • Tetsuo Togokahn as Nick
  • E.P. Arnold Royalton as The Grinch
  • Mr. Musha as Thidwick the Big-Hearted Moose
  • Ben Burns as Sylvester McMonkey McBean
  • Cruncher Block as Norval the Fish

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