- Ludwig "Kooky" Von Koopa as The Cat in the Hat
- Larry "Cheatsy" Koopa as Sam-I-Am
- Bowser as Joey
- Roy "Bully" Koopa as Horton the Elephant
- Morton "Big Mouth" Koopa Jr. as The Lorax
- Lemmy "Hip" Koopa as Thing One
- Iggy "Hop" Koopa as Thing Two
- Wendy "Kootie Pie" O'Koopa as Sarah Hall-Small
- Mario as The Grinch
- and more
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