Summary: Elmer Fudd is a mad scientist who wants to turn Bugs Bunny into a fiend. Bugs tricks this ersatz Dr. Jekyll into drinking his own mixture; later, each thinks the other has changed into a bear. (imdb)

Genres: Comedy, Family/Kids, Animation, Short

Country: USA

Directed By: Frank Tashlin

Written By: Warren Foster

Starring: Mel Blanc

More information at the Internet Movie Database