Ivo Shandor is a major supporting antagonist in the Kingdom Hearts Unlimited Saga, mostly appearing in backstory material related towards characters from the Ghostbusters franchise, before making a sudden appearance in "Return of the Keyblade" as a powerful secret boss that is fought on the way to stop Darth Sidious from enacting his plans of multiversal conquest.
Many years ago before the events of the attempted Keyblade War revival, Shandor worked as the designer of 55 Central Park West, using unusual materials such as cold-riveted beams with cores of pure selenium, magnesium-tungsten alloys and gold-plated bolts. Shandor designed the building in a fashion similar to the telescopes NASA uses to identify dead pulsars in deep space. He claimed this was to make the building an architectural marvel for the modern age, but in reality this was to serve as a gateway temple for the Cult of the Great Evil, conducting rituals upon the rooftop and studying arcane tomes of demonology in order to pave the way for the return of the Great Old Ones of legend, working as a member of the Separatists in their efforts to conquer the universe and rule it as they see fit. His research was crucial in Darth Plagueis and Darth Sidious' own experiments in studying dark energy, the nature of a spiritual heart, and the midichlorians.