vs. Megaguirus. A second idea involved Godzilla battling a new alien monster in a futuristic setting, but the script was considered too dark for a Godzilla film. The Guardian Monsters concept came next, though Kaneko's original script originally had Anguirus, Varan and Baragon defend Japan against Godzilla. Toho approved the script, but told him to replace Anguirus and Varan with the more popular Mothra and King Ghidorah, as the former pair were not considered bankable enough to guarantee a box-office hit. Skeptical at first, Kaneko managed to work the two new monsters into the film. The film is especially notable for the changes made to the monsters, such as King Ghidorah in a heroic role despite previously appearing as an antagonist and being shorter than Godzilla instead of taller. Additionally, Godzilla was meant to walk with his back and tail parallel to the ground. However, this idea was dropped due to the strain it put on Godzilla's suit actor, Mizuho Yoshida, and the monster retained its upright traditional posture. Like Ghidorah, Mothra is also portrayed as being smaller than previous incarnations and resembles a butterfly instead of a moth. She also displays the ability to fire stingers from her abdomen instead of her traditional poison powder. Furthermore, her Shobijin were dropped, though an homage to them appeared in the film as twins who see Mothra fly overhead. The changes were made to make Godzilla seem stronger as Kaneko wanted it to be the strongest monster in the film and originally chose monsters that are notably smaller and less powerful than Godzilla as its opponents. After being asked to work in Mothra and King Ghidorah, he compensated by making them weaker than past incarnations. Monster suit designer Fuyuki Shinada was reportedly disappointed that his favorite monster, Varan, would not be in the film, but compensated by adding its facial features to King Ghidorah's heads. Furthermore, Godzilla's radioactive element was replaced with a mystical element, as its origins are rooted in Japan's past during World War II. While Godzilla is still a mutant dinosaur that was created by the atomic bomb, it is also described as the embodiment of those killed or left to die at the hands of the Imperial Japanese Army during the Pacific War. The extent to which his nuclear and spiritual origins balance is never specified. Kaneko, a lifelong pacifist, wanted to give the film an anti-war angle.