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.
Universal Pictures
Universal owned the rights to the "Oswald the Lucky Rabbit" character, although Walt Disney and Ub Iwerks had created Oswald, and their films had enjoyed a successful theatrical run. After Charles Mintz had unsuccessfully demanded that Disney accept a lower fee for producing the property, Mintz produced the films with his own group of animators. Instead, Disney and Iwerks created Mickey Mouse, who in 1928 starred in the first "sync" sound animated short, "Steamboat Willie". This moment effectively launched Walt Disney Studios' foothold, while Universal became a minor player in film animation. Universal subsequently severed its link to Mintz and formed its own in-house animation studio to produce Oswald cartoons headed by Walter Lantz.