Jack is a tall skeleton who wears a black pin-striped suit, complete with a bat bow-tie and black dress shoes.
He has earned the title of Pumpkin King by being terrifying to humans (but never harming them), a clearly well-earned title as it appears he is even able to scare the monsters that occupy the town. He lives in Halloween Town, a world based solely on the holiday of Halloween.
(Source: The Nightmare Before Christmas Wiki)
Content compiled by AnimeList.moe from publicly available sources.
