Halloween Mask

Halloween Mask is an item in Great Pumpkin Island. This mask must be worn in order to be let into the Peanuts gang's Halloween party.

After you finish the World War II minigame, you will find yourself in a yard with a scarecrow. The scarecrow is wearing the Halloween mask. After you grab the mask, it will be transported to your inventory where you'll use it to get into the Halloween Party.

Trivia

 * It appears to be a mask of some sort of ogre.
 * It is one of two items you need to get into the Halloween party, along with the Party Invitation.