Pumpkin

Pumpkins are a species of character in the. Jack, who appears on October 31st (Halloween), is the only pumpkin to have appeared so far in the series, although villagers in town will also dress up like Jack on this night, making it more difficult for the player to identify Jack.

However, the pumpkin is not a real species, since is it likely that Jack is merely another species of animal that is dressed as a pumpkin for Halloween.