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 Universal's greatest success to date. The storyline for "Poor Papa" was reused in a Mickey Mouse short five years later, in "Mickey's Nightmare", 1932. Oswald the Lucky Rabbit became Universal's first major hit in 1927, rivaling other popular cartoon characters, such as Felix the Cat and Koko the Clown.