Sullivan (voice)
Mike (voice)
Boo (voice)
Randall (voice)
Waternoose (voice)
Celia (voice)
Roz (voice)
Yeti (voice)
Fungus (voice)
Needleman / Smitty (voice)
Floor Manager (voice)
Flint (voice)
Bile (voice)
George Sanderson (voice) (as Sam Black)
Additional Voices (voice)
Schmidt (voice)
News Anchor (voice)
Additional Voices (voice) (as Katie Evans)
Additional Voices (voice) (as Terese Ganzel)
Chuck (voice)
Marge (voice)
Simulation Mother / School Teacher (voice)
Monster Kid / Trailer Mom (voice) (as Bret Parker)
Charlie (voice)
Trailer Son (voice)
Tony (voice)
Chef (voice)
Ward (voice)
Baby Smitty (voice)
Josh Rivera (voice)
CDA Agent (uncredited)
French Reporter on TV News (voice) (uncredited)
Sale Salecic (uncredited)
Mate Vidovic (uncredited)
Screaming Sound Effects (uncredited)
Rex (outtakes) (voice) (uncredited)