The Grim Adventures of Billy and Mandy

S03E07 House of Pain

From the Plain of Eternal Suffering, the formidable Lord Pain arrives at Billy's home with the intention of serving his master, Grim. To his astonishment, he finds himself tasked with scrubbing the bathroom, leaving him puzzled by Billy and Mandy's treatment of Grim. As events unfold, Lord Pain comes to the surprising conclusion that Mandy is the true master he should obey and sets about making her mashed potatoes as a show of loyalty.