- Yakko as Thomas
- Ralph as Henry
- Pesto as James
- Squit as Bertie
- Elmyra Duff (from Tiny Toon Adventures) as Annie (do not speak)
- Fifi La Fume (from Tiny Toon Adventures) as Clarabel (do not speak)
- Dr. Otto as Edward (cameo)
- Pinky as Trevor (cameo)
- Prunella (The Sound of Warners) as The Storyteller (cameo)
- King Acorn (from Sonic The Hedgehog) as Sir Topham Hatt (mentioned)
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