Zero is Jack Skellington’s pet ghost dog in The Nightmare Before Christmas and lives with him in Halloween Town. He can fly and metamorphose and likes to play fetch with Jack. Zero is always loyal but showed reservations about Jack’s sudden obsession with Christmas as he was afraid it would turn into a disaster and make Jack unhappy. Despite this, Zero helped Jack out because his main concern is always Jack’s happiness and because he hoped Jack would live out his dream. His main feature is his nose, which is a tiny glowing jack-o’-lantern. Zero’s appearances in Disney parks are rare but you might be lucky to see him flying by from time to time.