Jack, a headless prankster from Grim's past, uses Billy to steal Grim's scythe so he can destroy Grim and take over the world with demons from the Netherworld.
Mayhem reigns supreme in the animated kingdom as whiz kid Ji...
Cartoon worlds collide in this hourlong adventure starring w...
Phineas and Ferb team up with the Avengers to save the world...
