The original ending was re-written on set.
The only sequel in the Ghoulies series to be given a theatrical release.
Was originally rated R, was re-rated PG-13 for the home video release despite little to no editing.
(The shots cut from the film are available on the Scream Factory Blu-Ray release and contain more gore and severed limbs)
The night scenes of the carnival were actually shot on an interior soundstage in Rome with rented, off-season equipment.
Despite receiving a very limited theatrical release, MTV had the video for W.A.S.P.'s "Scream Until You Like It," featuring clips from the film, in rotation nevertheless.