The Grim Adventures of Billy and Mandy (2001)

Episode Overview

Following a film screening, Grim shows Billy the art of body possession by entering people's minds. Billy decides to take over Mandy, leading her to engage in a series of outrageous acts, such as flirting with Irwin, kissing Mandy’s mom, sneaking into both restrooms, and munching on earthworms. Eventually, Billy exits Mandy's mind, but that night, Mandy retaliates by seizing control of Billy's cat, Milkshakes, sending it to attack him as payback for his antics.