• Nelson Muntz as The Cat in the Hat
  • Lyle Lanley as Mack the Turtle
  • Sideshow Bob as Horton the Elephant
  • Legs as Gordon
  • Louie as Norval the Fish
  • Jimbo Jones as Sam-I-Am
  • Comic Book Guy as Mr. Brown
  • Superintendent Chlamers as The Lorax
  • Kearny as Mr. Knox
  • Dolf as Fox in Socks
  • Mr. Burns as Conrad
  • Cheif Wiggium as The Grinch
  • Artie Ziff as Thidwick the Big-Hearted Moose
  • Janey Powell as Jane Kangaroo
  • Agnes Skinner as Pam-I-Am
  • Frank Grimes Jr. as Nick
  • Patty as Sarah Hall-Small
  • Cecil Terwilliger as Little Cat Fleep
  • Homer as North-Going Zax
  • Bart as South-Going Zax
  • Shelby as Terrence McBird

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