"Billy & Mandy" is an animated television series that aired on Cartoon Network from 2001 to 2007. The show follows the adventures of two children, Billy and Mandy, who befriend the Grim Reaper after winning a game of limbo. The series is known for its dark humor and unique animation style. The dynamic between the characters is central to the show, with Billy being goofy and naive, while Mandy is cunning and manipulative. Together, they navigate various supernatural challenges, often involving Grim and other quirky characters from folklore and mythology. The series has gained a cult following for its distinctive storytelling and humor.