http://psc.disney.go.com/guestservices/8709.htmlQ: What is Goofy? When did he debut?A: Goofy is a dog! Good-natured but not that bright, this cartoon character made his first appearance, somewhat disguised, as a member of the audience in "Mickey's Revue" (1932).
What distinguished the character from those sitting around him was not so much his appearance but his raucous laugh. That laugh made such an impression on Walt Disney and his staff that the character soon began to be featured in other cartoons. Before long, Goofy was part of the gang that included Mickey, Minnie, Pluto, Clarabelle Cow, and Horace Horsecollar.
In the newspaper comic strips, this new character was first given the name Dippy Dawg. A 1938 book indicated the first change to Dippy's name, "The Story of Dippy the Goof," and by 1939 the final change was made to Goofy with the release of the cartoon "Goofy and Wilbur."
Goofy was created as a human character, as opposed to Pluto, who was a pet, so he walked upright and had a speaking voice...