- Littlefoot as The Cat in the Hat
- Chomper as Thing 1
- Petrie as Thing 2
- Mutt as Horton
- Ducky as Jojo
- Ozzy as The Grinch
- Strut as Max
- Hyp as The Grouchy Guy
- Nod as Sam I Am
- Velociraptors as Sneetches
- Daddy Topps as North Going Zax
- Grandpa Longneck as South Going Zax
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