Mickey Mouse
Created as a replacement for a prior Disney character, Oswald the Lucky Rabbit, Mickey first appeared in the short "Plane Crazy", debuting publicly in the short film "Steamboat Willie" (1928), one of the first sound cartoons. He went on to appear in over 130 films, including "The Band Concert" (1935), "Brave Little Tailor" (1938), and "Fantasia" (1940). Mickey appeared primarily in short films, but also occasionally in feature-length films. Ten of Mickey's cartoons were nominated for the Academy Award for Best Animated Short Film, one of which, "Lend a Paw", won the award in 1942. In 1978, Mickey became the first cartoon character to have a star on the Hollywood Walk of Fame.
Goofy
Goofy first appeared in "Mickey's Revue", first released on May 25, 1932. Directed by Wilfred Jackson this short movie features Mickey Mouse, Minnie Mouse, Horace Horsecollar and Clarabelle Cow performing another song and dance show. Mickey and his gang's animated shorts by this point routinely featured song and dance numbers. It begins as a typical Mickey cartoon of the time, but what would set this short apart from all that had come before was the appearance of a new character, whose behavior served as a running gag. Dippy Dawg, as he was named by Disney artists (Frank Webb), was a member of the audience. He constantly irritated his fellow spectators by noisily crunching peanuts and laughing loudly, till two of those fellow spectators knocked him out with their mallets (and then did the same exact laugh as he did). This early version of Goofy had other differences with the later and more developed ones besides the name. He was an old man with a white beard, a puffy tail and no trousers, shorts, or undergarments. But the short introduced Goofy's distinct laughter. This laughter was provided by Pinto Colvig. A considerably younger Dippy Dawg then appeared in "The Whoopee Party", first released on September 17, 1932, as a party guest and a friend of Mickey and his gang. Dippy Dawg made a total of four appearances in 1932 and two more in 1933, but most of them were mere cameos.