<Li> Hanging Skeletons - A bunch of skeletons hanging from the Hanging Tree's branches . </Li> <Li> Harlequin Demon (voiced by Greg Proops) - A monster with three moving horns, sharp teeth, and a strange mouth . It attempts to make a hat out of dead rat during the song "Making Christmas". Though Jack voices his opinion and tells the Harlequin Demon to convert a dead bat into a hat . He also has the thought of pox in the box (Christmas present). </Li> <Li> Igor (voiced by an uncredited Joe Ranft in the film, Rob Paulsen in the video game sequel) - Dr. Finklestein's assistant who enjoys dog bone treats . He is seen giving at the town meeting and later giving Dr. Finklestein the plans for the skeleton reindeer . In The Nightmare Before Christmas: Oogie's Revenge, Igor tells Jack Skellington of Dr. Finklestein's strange behavior . Jack later helps Igor when his bone biscuit treats are stolen . </Li> <Li> Jack - o' - lantern - Numerous Jack - O' - Lanterns can found throughout Halloween Town . One Jack - O' - Lantern can be seen at the town meeting . </Li>

How did each of the characters in the nightmare before christmas die