Pluto (Disney) was originally created as Dippy Dawg" and "was created as a human character, as opposed to Pluto who was a pet, so [Goofy] walked upright and had a speaking voice". This problem was humorously illustrated in the film "Stand By Me" in which one of the boys ponders, "Mickey's a mouse, Donald's a duck, and Pluto's a dog. What's Goofy?" Also in the series "Funniest Pets & People" a dog "mentions" why couldn't he have pants because Goofy was a dog and had pants. There is also an episode of the Disney Channel series "Even Stevens" called "Scrub Day" wherein
Pete (Disney) new protagonist Mickey Mouse. Originally called "Terrible Tom", the villain was named "Pegleg Pete" by 1930 as the Disney crew felt that he was essentially a continuation of their earlier villain, albeit a different species. Animator Norm Ferguson, known for developing Pluto, also developed Pete's character in several shorts and he was made to resemble actor Wallace Beery. Pete appeared as Mickey's enemy beginning with the cartoons "The Gallopin' Gaucho" and "Steamboat Willie". In the cartoons of the 1930s, Pete would be Mickey Mouse's nemesis, but would vary in professions, from an all-out outlaw ("Gallopin' Gaucho" and the cartoon within