Oogie Boogie's Heartless

In the final battle in Oogie's dungeon in the movisode "The Nightmare Before Christmas", Oogie Boogie tried to use the powers of darkness to revive himself after Jack Skellington unraveled him. Instead, it turned him into a giant Heartless known as Oogie Manor, under the control of Fagin. The monster, under Fagin's orders, nearly destroyed all of Halloween Town with it's armies of Gargoyle and Wight Knight Heartless. It was thankfully destroyed by Sora and Spongebob with their dual Halloween keyblades, leaving Fagin angry once more.

However, this isn't the end of Oogie Boogie by a long shot. As it turns out, Oogie will return in Spirited Away as a Seeker of Darkness thanks to Fagin's dark magic. Because of this, Oogie will join Young Xehanort's Nu Organization to try and seek his revenge on Jack Skellington, who has currently brought the entire population of Halloween Town over to Yubaba's Bathhouse to take a holiday so to speak.

Oogie's Heartless has all new dark powers, thanks to his ressurection, which include dark fire spells,