Don Knotts is a recurring guest star character in Johnny Bravo. He is a fictional version of the real-life actor and comedian of the same name who is known for starring in many comedic films such as The Ghost and Mr. Chicken, and is also known for his role as Deputy Barney Fife from The Andy Griffith Show.
He first made a cameo appearance in "Bravo Dooby-Doo" as one of Jebedissa Bravo's red herring disguises. He made a much more bigger appearance in "Johnny Bravo Goes to Hollywood" where he was one of the stars of the movie that Johnny was originally cast in known as "Lunch Lady S'urprise." His final appearance was in "Johnny Makeover", where he along with "Weird Al" Yankovic and the Blue Falcon were the stars of a TV show called "Cartoon Makeover", where they served as a trio who would try to make changes to TV shows particularly Hanna-Barbera cartoons in order for them to be more suitable to target audiences. And from watching Johnny's show, they attempted to do the same to his.