It (Mad Monster Party)

Big Foot was the true main antagonist in the 1967 stop-motion film Mad Monster Party. In the film, Baron Boris von Frankenstein and Frescesca often addressed him as "it". He was first seen with a portrait of Francesca and searched for her at the castle. after finding her, Big Foot took her, as well as Boris and the monsters and stood in the ocean. After being unable to save them, Boris drops the deadly vial and kills Big Foot and everyone else (except Felix and Francesca).