- Hey, It's That Guy!: Actress Mariska Hargitay debuted in the first movie.
- Ghoulies III was Matthew Lillard's film debut.
- What Could Have Been: Stan Winston was intially attached to the first film to do the effects.
- The film originally began planning as Beasties, and was meant to be a more family-friendly film where the Ghoulies would help a little girl. Charles Band couldn't get any investors interested in the project however, which led to his acquirement of a later script titled Ghoulies.