Shaggy Rogers (voice)
Blue Falcon (voice)
Dick Dastardly (voice)
Velma Dinkley (voice)
Fred Jones (voice)
Daphne Blake (voice)
Dee Dee Skyes (voice)
Dynomutt (voice)
Captain Caveman (voice)
Scooby-Doo / Pterodactyl (voice)
Young Shaggy (voice)
Young Daphne (voice)
Young Fred (voice)
Young Velma (voice)
Simon Cowell (voice)
Officer Jaffe (voice)
Keith (voice)
Harry Perry (voice)
Restaurant Owner (voice)
Bike Cop Gary (voice)
Ira Glass (voice)
Chad / Chet (voice)
Judy Takamoto (voice)
Muttley (voice)
Muttley (archive sound)
Cerberus (voice)
Jamie Rivera (voice)
Indira Knight (voice)
Hal Murphy (voice)
Beach Guy (voice)
Mrs. Rogers (voice)
Ghost / Mr. Rigby / Alice (voice)
Officer Casey (voice)
Officer North (voice)
Baby Rotten (voice)
Dispatcher Stevens (voice)
Kari (voice)
Ben (voice)
Samuel Colton (voice)
Charlie the ghost (voice)
Alvarez (voice) (uncredited)
Police Officer (voice) (uncredited)