- Barney as Henry
- Danny as Percy
- Scrappy Doo (from Scooby Doo) as Bertie
- Underdog (from Underdog) as Harold
- Homer (from The Simpsons) as Sir Topham Hatt
- Ashley and Alisa as Annie and Clarabel (non speaking role)
- BJ as James (cameo)
- Scooby Doo (from Scooby Doo) as Trevor
- Tails (from Sonic X) as Butch
- RC Car (from Toy Story) as Tiger Moth
- Michael Brandon as Narrator
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