List of breakout characters
Felix the Cat was originally conceived as a one-shot character for the film Feline Follies, which was made solely because another animator was tardy with his work for the Paramount Screen Magazine, and Pat Sullivan and Otto Messmer agreed to fill in with a cartoon of their own. Felix's debut was so well liked by audiences that it immediately took off as a hit, graduated to his own standalone series and became one of the most iconic and influential cartoon characters of all time.