- King Goobot as Rude Ralph
- Ooblar as Horrid Henry
- Jimmy Neutron as Brainy Brian
- Carl Wheezer as Aerobic Al
- Cindy Vortex as Prissy Polly
- Nick Dean as Perfect Peter
- Butch Pakvoski as Goody Goody Gordon
- Libby Folfax as Gorgeous Gruinder
- Sheen Estvez as Beefy Bert
- Goddard as Tidy Ted
- Humpery as Spotless Sam
- Beautiful Gorgeous as Miss Battle-Axe
- Grandma Taters as Moody Margaret
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