Mad Monster Party?

Mad Monster Party? is a movie starring Boris Karloff, Allen Swift, and Gale Garnett. On the Isle of Evil, the head of the "World Organization of Monsters" reveals his imminent retirement and that he has refined a formula for total...
When Dr Frankenstein decides to retire from the monster-making business, he calls an international roster of monsters to a creepy convention to elect his successor. Everyone is there including Dracula, The Werewolf, The Creature, Dr Jekyll & Mr Hyde and many more. But Frankenstein's title is not all that is at stake. The famous doctor has also discovered the secret of total destruction that must not fall into the wrong hands!