- The Lorax as Eric Cartman
- Ted as Stan Marsh
- Pipsqueak as Kyle Broflovski
- Audrey as Wendy Testaburger
- The Once-ler as Randy Marsh
- Young Once-ler as Kenny McCormick
- Mr. O'Hare as Tom Brady
- The Once-ler's Brothers as Craig Tucker and Clyde Donovan
- and more
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