The idea of a "Space Godzilla" was first conceived in 1978, and was designed as a homage to the monster's hinted progenitor Biollante by incorporating tusks and a hissing roar reminiscent of the latter monster. Creature designer Shinji Nishikawa had initially envisioned SpaceGodzilla as a much more western dragon-like creature with large fin-like wings on the back. The final design bore greater resemblance to Godzilla's final form from the video game "Super Godzilla", itself also designed by Nishikawa. Effects artist Koichi Kawakita redesigned Godzilla's son as a more cartoonish-looking character, having disliked the more dinosaurian-looking version in "Godzilla vs. Mechagodzilla II." It was rumoured that Kawakita intended to use the new design in a children's spinoff TV special entitled "Little Godzilla's Underground Adventure". However, this was nothing more than a myth. The M.O.G.U.E.R.A. suit was worn by Mechagodzilla performer Wataru Fukuda, and consisted of three pieces applied separately. The new Godzilla suit used for the majority of the film combined aspects of the suits used in "Godzilla vs. Biollante"/"Godzilla vs. King Ghidorah" and "Godzilla vs. Mechagodzilla II", having a stocky, triangular build, wide shoulders and much less pronounced ribbing on the neck. The face bore similarities to those used in the previous two films, though the eyes were increased in size and given more prominent whites, thus making it relatively less menacing looking than its predecessors. Innovations included the head's ability to fully rotate around the body, and the incorporation of an air duct which solved the chronic ventilation problems present in previous suits. The suit from "Godzilla vs. Mechagodzilla II" was reused for Godzilla's entrance and exit from Birth Island and during the scene where he is telekinetically tossed by SpaceGodzilla.