- Timmy Turner as Jimmy Neutron
- Rocko (from Rocko's Modern Life) as Goddard
- Chester as Carl Wheezer
- AJ as Sheen Estevez
- Timmy's Dad as Jimmy's Dad
- Timmy's Mom as Jimmy's Mom
- Veronica as Cindy Vortex
- Trixie Tang as Libby Folfax
- Denzel Crocker as King Goobot
- Francis as Ooblar
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