The Grim Adventures of Billy and Mandy (2001)

Episode Overview

On Christmas Eve, Billy, Mandy, and Grim visit the mall, where Mandy voices her skepticism about Santa Claus, claiming he’s merely a corporate myth. Grim, however, insists that Santa truly exists and even reveals they were college pals. Curious, they embark on a journey to the North Pole to meet him. Upon arrival, Mrs. Claus reveals shocking news: Santa has been turned into a terrifying vampire.