Nibbler (voice) / Nibbler / Pygmy Hyena Moles (voice) / Raccoon / Plants (voice) / Tardigrades (voice) / Mountain Lion (voice)

Supporting Role

Monkey Rockwell (voice)

Scooby-Doo / Fred Jones (voice)

Dai Gui (voice) / Wire-Operated Samurai (voice) / Animals (voice) / Magister #3 (voice)

Fred Jones / Scooby-Doo (voice)

Supporting Role

Ambrose / Butch (voice)

Scooby-Doo (voice) / Boskov

Runt / Buttons (voice)

Fred Jones / Scooby-Doo (voice)

Megatron / Terrorcon (voice)

Mayor Stevenson (voice)

(voice)

Bullseye / Buster / The Monkey / Pigeon (voice) (uncredited)

Announcer (voice)

Fred / Scooby Doo (voice)

Mayor Stevenson / Weather Man (voice)

Footstool (voice)

Mystery (voice) / Clamu / Baby Oyster (voice) / Gorilla (voice)

Bigtime Beagle / Baggy Beagle / Bubba the Caveduck (voice)

Abu / Cave of Wonders / Rajah (voice)

Krunk (voice) / Mr. Luzinski (voice) / Dog (voice) / Dynomutt / Dynomutt X90 (voice) / Monster (voice) / Dinosaur / Dog (voice) / President / General / Guy / God / Man #2 / Einstein (voice) / Monkey / Snorkdro (voice) / CM1129 (voice) / Mr. Luzinsky (voice) / Earl / Trucker #1 (voice) / Monkey / Turtle (voice) / Dogbot / Robot #1 / Robot #3 (voice) / Krunk / Dentist (voice) / Semitaur / Wizard / Chinese Dragon (voice) / Monkey / Captain (voice) / Lawnmower / Plant Monster (voice) / Monkey / Quakor (voice) / Announcer / Monkeys (voice) / Krunk / Minotaur / Cat (voice) / Teacher / Robot / JoJo (voice) / Monkey / Man #3 / Pilot (voice) / Monkey / Meteor / Tanner (voice) / Caveman / Bear (voice) / Mr. Lazinsky (voice) / Krunk / White Tiger (voice) / Mr. Lazinsky / Guy #3 (voice) / Teacher #2 / Principal (voice) / Monkey / Ref / Krunk (voice) / Monkey / Quackor / Mr. Luzinski (voice) / Krunk / Bee (voice) / Monkey (voice) / Krunk / Goat (voice) / Mr. Luzinsky / Trevor (voice) / Monster / Rock Monster / Dragon (voice) / Squirrel (voice) / Krunk / Monkey (voice) / Monkey / Krunk (voice) / Dog / Announcer / Vet (voice) / King Martian (voice) / Robot / Boy / Boy #2 (voice) / Monkey / Krunk / Monster (voice) / Monkey / Girl Monkey (voice) / Mr. Luzinsky / Smart Dad (voice) / Abe Lincoln / Mr. Luzinski (voice)

Tick-Tock the Crocodile (voice) / Billy the Squid (voice) / Fat Beetle / Barfly Bouncer / Ribbit (voice) / Robot Dogs (voice) / Todd / Plane Captain (voice)

Additional Voices (voice)

Gus Goose / Butch the Bulldog / Lion / Lucifer (voice)

Announcer (voice)

The Sluggard (voice) / Flugel / Frog (voice) / Zephyrs (voice) / Marquis de Bouillabaisse (voice) / Henchman / Horse / Cows (voice) / Griffin / Mervyns (voice) / Finwithit (voice) / Jabber (voice) / Guard Dog (voice) / Bobo (voice)

Megatron (voice)

Experiments (voice) / (voice) / Mr. Stenchy: Experiment 254 (voice) / Tanlined Ice Cream Tourist (voice) / Sparky (voice) / Skip (voice) / Sparky / Yin / Yang / Slushy / Kixx (voice) / Poxy (voice) / Kixx (voice)

Eek / Squeak / Archie (voice)

Wildey Pole / Additional Voices (voice) / Additional Voices (voice) / Buffy Vanderschmere (voice) / Wendell (voice) / Captain Hotspur (voice) / Pilot Jack / Gorilla-Birds (voice) / Red Robe Thug #2 / Scarabs (voice) / Brutis / Red Robe Thug #2 / Scarabs (voice) / Sparky / Maswich Village Mayor (voice) / Al / Creatures (voice) / Giant Condor (voice) / Dimple (voice) / Henry / Inkaras / Gator Policeman (voice)

Goddard / Special Vocal Effects (voice) / Goddard / Phantom #4 / Special Vocal Effects (voice) / Special Vocal Effects (voice) / Goddard / Tubbs / Special Vocal Effects (voice) / Goddard / Wendel / Special Vocal Effects (voice) / Goddard / Mr. Wuggles / Special Vocal Effects (voice) / Tubbs / Special Vocal Effects (voice) / Goddard / Second Guard / Special Vocal Effects (voice) / Goddard / Mr. Strych / Special Vocal Effects (voice) / Goddard / Tubbs / Father / Special Vocal Effects (voice) / Goddard / Tubbs / Health Inspector / Special Vocal Effects (voice)

Max (voice) (uncredited)

Woof / Ace (voice)

Altivo (voice)

Orbitty (voice)

Fred Jones / Speed Buggy (voice) / Barney Rubble / Dino (voice)

Bo / Booker / Sheldon (voice)

Reeves (voice)

George / Bill's Bunnies (voice)

Fred Jones (voice)

Stripe / Mogwai / Gremlins (voice)

Soundwave / Megatron / Rumble / Frenzy / Wheelie (voice)

Baby Dragon (voice)

Scooby-Doo / Fred (voice)

Toby the Dog / Felicia the Cat (voice) (uncredited)

Spike (voice) (uncredited)

Sparky (voice) (uncredited)

Dexter's Computer / Monkey (voice) / Fred Jones / Cheese of the Future Narrator (voice)

Uncle Stinky Pig / Byron Basset / Furrball / Little Beeper / Gogo Dodo / Vinnie / Mac Duff / Additional Voices (voice)

Mox / Macqaque Wallah (voice)

Hefty Smurf (voice)

Bullseye (voice)

Abominable Snowman (voice)

Graboids (uncredited)

(voice)

Werewolf Vocal Effects (voice)

Charles the Dog (voice)

Grandpa Mort (voice)

Whole Lotta Monkeys (voice)

Max the Dog (voice)

Archbishop / Dying King (voice)

Tom / Jerry (voice) (uncredited)

Additional Voices (voice)

Cat / Troll (Voice)

Additional Voices (voice)

Tooter Shelby/ Occy/ Grandpa Wetworth/ Great Snork Nork/ Finneus

Joanna / Marahute (voice)

Jabberwocky / Bandersnatch / Jubjub / Bayard (additional voice)

Additional Voices (voice)

Sonya (voice)

Spock's Screams

Additional Voices (voice)

George (voice)

Mohawk (voice)

Grubs (voice) / Bat Creature / Slime Beast / Jessica / Stratoshrike (voice) / Brain Pod #39 (voice) / Narlzak / Strato-Shrike (voice) / Maw / Little Maw / Radio Announcer / Tangean Terrorists (voice) / Epoch (voice) / Grubs / Brain Pod (voice) / Brain Pod #26 / Grubs / Computer Voice (voice) / Additional Binipinardians (voice) / Pteradoc / Tarpax (voice) / Ranger (voice) / Senator (voice) / Brain Pod #17 (voice) / Bad Gargantians (voice) / Grub (voice) / Epoch / Senator / Phlegmex / Alien Guard (voice) / Ranger / Tentacled Alien (voice) / Shape / Creature (voice) / Dad (voice)

Sparky / Sprout / Mr. Stenchy / Kixx / Hoilo / Slugger (voice)

Tom / Jerry / McWolf (voice)

Nana II / Octopus (voice)

Fred Jones / Scooby-Doo / Baron Von Billfold (voice) / Fred / Scooby-Doo (voice)

Various Martians (voice)

Grubs / Self Destruct / Ranger #1 / Cadet Flam (voice)

Dragon (voice) (uncredited)

Sparky (voice)

Scooby-Doo (voice)

Bushwoolie # 3 / Grundle (voice)

Reggie (voice)

Obby / Mantell (voice)

Special Vocal Effects (Voice)

The Devil/Station/Evil Easter Bunny (voice) (uncredited)

Abu / Rajah / Fazahl (voice)

Alien (voice)

Rahzar / Tokka (voice)

Tickles (voice)

Lucifer / Bruno / Pom Pom (voice)

Goddard / Poultra (voice)

Creature Voices (voice)

Squeep / Grungees (voice)

Additional Voices (voice)

Animals' Vocal Effects (voice, uncredited)

Animals' vocal effects (voice) (uncredited)

The Thing (voice)

Mannequins / Beast (voice)

Special Vocal Effects

Batso (voice)

Spindle / Frog / Caterpillar (voice)

Azrael (voice)

Bunny the Dog (voice)

The Monster

Chuck (voice)

Special Vocal Effects (voice)

Giant Bat (voice)

Special Vocal Effects (voice)

Buddy (voice)

Achilles & Djali (voice)

Nevins (voice)

Kangaroo Jack (voice)

Assassimon (voice) (uncredited)

Sharak / Kodo / Podo / Ruh (voice)

Alien Gen. Suitor (voice) (uncredited)

Animals' vocal effects (voice, uncredited)