Loopy unknowingly befriends a scientist who turns into a monster on and off without Loopy knowing that the monster is really him.
Daws Butler
Loopy De Loop (voice)
Hal Smith
Elderly Woman / Mr. Hyde (voice)
Don Messick
Car Owner / Dr. Jekyll (voice)
Kitty Foiled
Dog Trouble
Mickey's Steam Roller
Old Rockin' Chair Tom
Mouse Cleaning
Megamind: The Button of Doom
Jerry and the Goldfish
Plankton: The Movie
Gone Fishing
The Milky Waif