Frank Welker

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)