"Jumbo Johnny" is the first segment of the tenth episode from Season 1 of Johnny Bravo.
Synopsis[]
To become more muscular and bigger, Johnny purchases a new product called "Uber Mass" from a sketchy salesman. The instructions say that it will take approximately 6 weeks to work, but Johnny is in too much of a hurry to get ripped to follow the instructions and drinks the entire case. As a result, Johnny becomes massively overweight.
Video[]
Johnny Bravo - Johnny Gains Weight - Cartoon Network
A clip of the episode.