• Grandpa Abe Simpson as The Cat in the Hat
  • Apu as Mack the Turtle
  • The Yes Guy as Horton the Elephant
  • Superintendent Chalmers as Joey
  • Mr. Burns as Norval the Fish
  • Ralph Wiggum as Sam-I-Am
  • Homer as Gramps
  • Michael D'Amico as The Lorax
  • Kearney as Mr. Knox
  • Dolph as Fox in Socks
  • Lou as Conrad
  • Moe as The Grinch
  • Lenny as North-Going Zax
  • Carl as South-Going Zax
  • The Sea Captain as Thidwick the Big-Hearted Moose
  • Allison Taylor as Sarah Hall-Small
  • Old Gill as Little Cat Fleep
  • and more

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