Ankoku Grendizer is a fan made Italian film made by Spadoni Productions. It is an alternate story of the original Grendizer story first telling events with a fan made comic before going into a live action format. It also features 3D models of the robots from the other franchises such as Mazinger Z and Boss Borot.
Duke and Maria Fleed flee the lost Planet Fleed on the Spazer but on the way encounter an evil Grendizer. Maria survives and manages to escape after being telepathically given a message and is given passage in what appears to be the Skull Pilder. Duke crashes to Earth alive and is found by a group of his friends for a chance to fight the new threat.