Johnny Bravo The series takes its roots from a senior thesis project creator Van Partible did for Loyola Marymount University, about an Elvis Presley impersonator.[2] Mess O' Blues (1993) was shown by Partible's animation professor at the college to a friend working for Hanna-Barbera Cartoons at the time. The studio loved the film and asked him to develop it into a pitch for a seven-minute short. Partible sold the project to Hanna-Barbera shortly afterward.[3] The short would be aired on Cartoon Network's new animation showcase, World Premiere Toons.[2] Also known as the What a Cartoon! Show, the series' short cartoons (three per half-hour episode) mirrored the structure of a theatrical cartoon, with each film being based on an original storyboard drawn and written by its artist/creator.