Imhotep

Imhotep is a support antagonist of the Monster Family.

Trivia
Even though he and Count Dracula never interacted they have things in common.
 * Both are antagonistic monsters who fall in love with a Wishbone of the same species (Emma for Count Dracula and Fay for Imhotep).
 * Both helped Wishbone with one thing (Count Dracula gave Emma an antidote and Imhotep taught Fay how to use the mummy's power) but were later rejected for his cruelties (Count Dracula is blamed for the Wishbones being turned into monsters and Imhotep wanted to rule the world).
 * both turned into giant animals (Count Dracula on a bat and Imhotep on a cockroach) before the fight and they remained that way for the rest of the film (unlike Count Dracula, Imhotep still returned to his original form twice while Frank beat him on the floor).