Mega Muriel the Magnificent - Season 2,Episode 7

Courage's Computer, who is sick and tired of answering Courage's questions about shadows, monsters, etc., and thinks they're not scary, so he does something evil... he uploads his memory into Muriel's body and controls it. He does stunts to make Courage have to rescue the Computer (which is in Muriel's body). Eventually, he gets stuck and Courage has to save him from a machine. Even the Nowhere News was there to telecast these stunts of Muriel (or The Computer). Eventually, the computer apologizes and goes back into the monitor, and Muriel returns to her normal self.