The hobgoblin puppets were operated by a woman who had just been released from a mental hospital.
Rick Sloane didn't see the puppets for the hobgoblins until the night before the first day of shooting.
Rick Sloane initially planned on making a sequel in 1990 and had even written a screenplay for it, but nothing ever came of it.
John Carradine was approached to play the old man who owns the movie studio, but his agent asked for too much money.
The character of Daphne was specifically written with Kelley Palmer in mind to play her, because Rick Sloane went to high school with Palmer.
Rick Sloane claims to have written the first draft of the script prior to Gremlins (1984).
Tamara Clatterbuck had to pee behind a bush because there was no money in the budget to afford a Porta Potty at the location for Reputation Road.
Only the eyes for the hobgoblins were going to be seen in an earlier draft of the script.
Angelyne and Sybil Danning were both considered for the role of Fantazia. Angelyne wasn't cast because she refused to memorize dialogue, and only wanted to play herself. Rick Sloane had to pass on Danning due to the fact that there wasn't enough money in the budget to afford her.
The Club Scum M.C. was originally a smaller part, but Rick Sloane was so impressed by Daran Norris's reading that Norris did in a number of different cartoon voices that he wrote more scenes for that particular character.
McCreedy's gun was actually a cap pistol that was purchased from a toy store for five dollars.
A bank vault was used as the film vault that the hobgoblins are imprisoned in. The door of the bank vault was so heavy that several crew members off camera had to help the actors open it.
The character of Nick wasn't in earlier drafts of the script. Moreover, Nick was specifically added to the script because the distributors wanted more action in the film.
The location used for Club Scum was a club in West Los Angeles called The Music Machine.