Monster Mash: The Movie (1995)

Two teens are on the way to a Halloween party dressed as Romeo and Juliet when their car breaks down in front of a sinister mansion. Seeking help, they fall into a party of monsters led by Dr. Frankenstein, who immediately wants to transfer the boy's brain into his monster. Dracula also wants the girl for obvious reasons. Meanwhile Elvis has returned as a mummy and his new manager wants the boy's body for him. Lots of silliness results.