Billy & Mandy's Big Boogey Adventure

In "Billy & Mandy's Big Boogey Adventure," Billy, Mandy, and Grim team up to stop the Boogey Man from obtaining Horror's Hand, a powerful artifact that can bring people's deepest fears to life. The two groups embark on a perilous journey across the River Styx, facing their worst nightmares and competing in a race to reach the Hand before the Boogey Man does. In the end, Grim outsmarts the Boogey Man and claims the Hand, using its power to defeat him once and for all.