Jim Carrey
Ivo Robotnik / Gerald Robotnik
Joel Barish
Bruce Nolan
Dr. Robotnik
Dr. Robotnik
Horton (voice)
Count Olaf / Dr. Stephano / Captain Sham
Colonel Stars and Stripes
Carl Allen
Scrooge / Ghosts of Christmas (voice)
Lloyd Christmas
Off. Charlie Baileygates / Hank Evans
Steve Gray
Dick Harper
Walter Sparrow / Fingerling
Mr. Popper
Peter Appleton
The Hermit