Cast[]
- Grey DeLisle as Ariela McMissile, Daughter of Mr. Zilliax Ka McMissile and Mrs. Stevia McMissile, and Larie Melissa
- James Arnold Taylor as Rodney Copperbottom, Son of Mr. Herb Copperbottom and Mrs. Lydia Copperbottom
- Corey Burton as Phineas T. Ratchet and Agent Stone
- Jeff Bennett as Lawrence Geargrinder, Henchmen of Phineas T. Ratchet
- Tom Kenny as Zen Kamin
- Hank Azaria as Bartok
- Frank Welker as Wonderbot, Lucky of Bartok's Best Friend and Pooka, Cappy's pet dog
- Dan Castellaneta as Fender Pinwheeler
- Tegan Moss as Piper Pinwheeler
- Martin Short as Diesel Springer
- Robert Costanzo as Crank Casey
- Jim Cummings as Lugnut
- Kelsey Grammer as Zozi
- Jim Ward as Bigweld
- Jennifer Coolidge as Aunt Fanny
- Kath Soucie as Lydia Copperbottom
- Dee Bradley Baker as Herb Copperbottom
- René Auberjonois as Zilliax Ka McMissile
- April Stewart as Stevia McMissile
- Sandra Bernhard as Loretta Geargrinder
- Keith David as Tublark
- Kevin Michael Richardson as Phantom Blot
- Fred Tatasciore as Pathen Thor
- Dave B. Mitchell as Angstorm Darkwater
- Andrew Stanton as Clay-Long Gasket
- John Wahba as Mal Gasket
- David Lander as Thumper Gasket
