Mad Monster Party?

When Dr Frankenstein decides to retire from the monster-making business, he convenes an international roster of monsters to a haunting convention to elect his successor. The gathering includes Dracula, The Werewolf, The Creature, Dr Jekyll & Mr Hyde, and many more. But Frankenstein's title is not all that is at stake. The renowned doctor has also uncovered the secret of total destruction that must not fall into the wrong hands!