The Hallo-weenie is the supposed spirit of Halloween and a Holiday Mascot, but in actuality he is The Easter Bunny's dog dressed in Halloween-like attire.
The Hallo-weenie is one of several Holiday-themed characters that joined up with the Easter Bunny in his plot to kidnap Santa Claus. Not much else is known about him, or if he is really a mascot or just the Easter Bunny's pet. Easter Bunny mentioned that he doesn't like to leave him alone at his house.
He is a Dachshund (long dog) with a pair of bat wings attached to his back and a collar with a pumpkin-shaped tag. He also had a pumpkin mask, but it fell into pieces.