The Grand Pumpkin

The Grand Pumpkin is a decoration released during the Treehouse of Horror XXV Event. It is one of the prizes that can be crafted at the Make-a-Thing Workshop

About
The Grand Pumpkin is a giant pumpkin which appears in all the pumpkin patches in the world on Halloween and brings candy to kids who truly believe in him. Bart claims to have made him up to mess with Milhouse, but his big childlike belief brought the Grand Pumpkin to life.

Trivia

 * The Grand Pumpkin is a parody of the Great Pumpkin from the popular Peanuts comics.