- Thomas as Fanboy
- Percy as Chum Chum
- Emily as Yo
- Mavis as Lupe
- Rosie as Nancy Pancy
- Molly as Cher Leader
- Daisy as Francine
- Elizabeth as Marsha
- Bertie as Dollar-Nator
- David Hornsby - Thomas
- Nika Futterman - Percy
- Dyana Liu - Emily
- Candi Milo - Mavis, Molly, Daisy and Elizabeth
- Kari Wahlgren - Rosie
- Jeff Glen Bennett - Bertie
- Emily: Oooooh, Thomasina likes Thomas!
- Belle: He is, like, oh, so dorky!
- Mavis: Dat Tank engine has problems.
- Rosie: Ee-ee-ee-ee!
- Emily: Wait a minute!, Look at them!
- Molly: They're boys!
- Mavis: It's FanThomas and Percy Chum.
- Elizabeth: The Ultimate breach of Slumber Party Protocol!
- Emily: These boys must be punished!
- Daisy: I can't believe they thought we were Buffer-Eating Aliens uh.
- Emily: I know!, We're Funnel-Eating Aliens!
- Elizabeth: I like Whiff!
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