Guest Stars Stephen Stanton voices Sanderson Roberts Gannaway voices Roto Christopher Swindle voices Phlegm Alanna Ubach voices Carla Dee Bradley Baker voices Banana Bread Bonnie Hunt voices Ms. Flint Christopher Swindle voices Fungus Curtis Armstrong voices Mr. Crummyham Bob Peterson voices Roz Alfred Molina voices Professor Knight Roberts Gannaway voices Bobs Christopher Swindle voices Ted Roberts Gannaway voices Chalooby Alanna Ubach voices Narrator Christopher Swindle voices Little Boy Co Starring Michaela Dietz voices Additional Monsters Romi Dames voices Additional Monsters Ferrell Barron voices Additional Monsters