Megatron (voice)
Mochi (voice) (uncredited)
Galvatron (voice)
Azrael (voice)
Mayor Stevenson (voice)
Sparky Frankenstein (voice)
Mayor Stevenson / Weather Man (voice)
Sonya (voice)
Mannequins / Beast (voice)
Azrael (voice)
Shockwave / Soundwave / Barricade (voice)
Bullseye (voice)
Bullseye / Buster / The Monkey / Pigeon (voice) (uncredited)
Dragon / Animals (voice) (uncredited)
Mark Whitacre's Father
Momma Dino (uncredited)
Soundwave / Devastator / Reedman / Grindor (voice)
Nibbler (voice)
Animals' vocal effects (voice) (uncredited)
Nibbler / Fleb / Seymour (voice)
Sparky / Sprout / Mr. Stenchy / Kixx / Hoilo / Slugger (voice)
Frank the combine (voice) (uncredited)
George (voice)
Reinaldo Vocal Effects (voice)
Scooby-Doo (voice)
Sparky (voice)
Spike (voice)
Obby / Mantell (voice)
Jack's Vocal Effects
Creature Voices (voice)
Goddard / Poultra (voice)
Buddy (voice)
Dragon / Animals' Vocal Effects (voice) (uncredited)
Max the Dog (voice)
Petey
Altivo (voice)
Bullseye / Buster (voice) (uncredited)
Parrot Noises (voice)
Sabor (voice) (uncredited)
Flit (voice) (uncredited)
Khan / Cri-Kee (voice)
Creature Vocals (voice)
Catzilla, Mouse
Anaconda (voice)
Various Martians (voice)
Charles the Dog (voice)
Special Vocal Effects (voice)
Baby Bird (voice)
Abu / Rajah / Fazahl (voice)
Flit (voice)
Bigfoot (voice)
Reindeer Voices (voice)
Mastadge (voice)
Additional Voices (voice)
Special Vocal Effects (voice)
Abu / Cave of Wonders / Rajah (voice)
Footstool (voice)
Rahzar / Tokka (voice)
Joanna (voice)
Max (voice)
(voice)
Sharptooth (voice) (uncredited)
Additional Voices (voice)
Dumbo (voice) (uncredited)
The Thing (voice)
Special Vocal Effects (voice) (uncredited)