About Me
Jack "Danger" Skellington is a skeleton known as the "Pumpkin King" of Halloween Town, a fictional world based solely on the holiday of Halloween. He is the main male protagonist of The Nightmare Before Christmas film. He has a pet ghost dog named Zero, who has a small glowing nose that looks like a jack'o'lantern. His love interest is Sally, a rag doll created by Dr. Finklestein.
The Nightmare Before Christmas
The film commences after the grand finale of Halloween, which was the town's "most horrible yet". Jack, however is growing bored with Halloween, and is in search of a stronger sense of purpose. While wondering aimlessly through the Hinterlands, he stumbles upon a grove of trees marked by doorways with festive icons. He inadvertently finds his way into Christmas Town and becomes infatuated with the holiday. After obsessively researching the holiday, he decides that this year, the citizens of Halloween Town will make Christmas in the hopes of "improving" it. Sally, a rag doll who secretly loves him, has a premonition of disaster and attempts to warn Jack, who dismisses her fear.
Sally's premonition proves to be right. Not really understanding the "point" of Christmas, the citizens of Halloween Town create a celebration of the macabre rather than a "season to be jolly"; Jack, dressed as Santa Claus, brings terror rather than joy to the children of the world.
Wanting Santa Claus to rest, Jack had ordered the local tricksters Lock, Shock, and Barrel to bring Santa to Halloween Town and make him comfortable; however, the three tricksters bring him instead to the evil Oogie Boogie, who decides to tease, kill, and eat Santa. Sally attempts to rescue Santa Claus, but is herself captured.
Upon realizing his error, Jack overcomes his identity crisis and reaffirms himself as the Pumpkin King. With determination to both correct his mistake and save Christmas, Jack promptly returns to Halloween Town. Upon returning to Halloween Town, he discovers that Santa has been taken to Oogie Boogie. He enters Oogie's lair and rescues his friends while destroying the fiendish Oogie. Santa Claus returns to the world to resurrect Christmas and, as a sign of no hard feelings, gives Halloween Town taste of true Christmas spirit, which is essentially what Jack wanted. Jack finds Sally atop a hill blanketed in snow and reveals his own affection for her.
The final line of the movie shows the two of them realizing that they are "meant to be together"
Personality
Jack is generally vivacious, charismatic gentleman — a stark contrast to his undead status — and is fond of grand theatrics, which is likely a significant part of what makes him the best at what he does. He is quick and eager to make new friends, but on that note seems to assume (often incorrectly) that others are the same. Although kind-hearted, Jack has a tendency to be self-absorbed and more than a little oblivious, failing to notice both Sally's affections and Santa Claus's apparent dislike of him. He has a tendency to become fascinated with an idea to the exclusion of all others.
Jack appears to believe in only using violence as a last resort. When angered or forced to fight, Jack is stern and solemn. He tends to favor utilizing his exceptional speed, flexibility, and agility in combat, leaping and dodging to avoid attacks. Unlike Oogie Boogie, Jack is rarely seen to use his monstrous powers for his personal gain.
It is possible that Jack Skellington and Oogie Boogie are foils: Jack is slender, good natured, kindhearted, artistic, and thoughtful where as Oogie is fat, sadistic, gross, and loudmouthed. It is also revealed that Jack holds Oogie Boogie in great contempt.