Oswald the Lucky Rabbit time, Felix the Cat and Krazy Kat. Universal was given the right to name the rabbit and it selected a name out of a hat. The first Oswald cartoon, "Poor Papa", was rejected by the Universal studio heads for its poor production quality and the sloppiness and age of Oswald. Disney, together with Iwerks, decided to create a second cartoon titled "Trolley Troubles" featuring a much younger, neater Oswald. The short, released on September 5, 1927, officially launched the series and proved to be Disney's greatest success to date. The storyline for Poor Papa was reused in a Mickey Mouse
Oswald the Lucky Rabbit a townsperson in "". During his days under Disney, Oswald was one of the first cartoon characters that had personality. As outlined by Walt himself: "Hereafter we will aim to [make] Oswald a younger character, peppy, alert, saucy and venturesome, keeping him also neat and trim." With Oswald, Disney began to explore the concept of "personality animation", in which cartoon characters were defined as individuals through their movements, mannerisms and acting, instead of simply through their design. Around this period, Disney had expressed, "I want the characters to be somebody. I don't want them just to be a drawing." Not