Chamelegon's name is derived from "chameleon," spelled in Japanese as カメレオン (kamereon). The name was likely chosen for Chamelegon's invisibility, as chameleons are known for their camouflaging abilities.
Chamelegon was an alien mecha deployed by the Titan Aliens in an effort to eliminate Godzilla and seize control of Japan. Godzilla first encountered Chamelegon in the Japanese Alps, noticing the invisible robot fly overhead. After battling and driving away another of the aliens' pawns, Gigan, Godzilla was lured to a nearby city by Chamelegon, who sought to turn humanity against him by making it appear as though he was attacking. The military launched an attack against Godzilla, blinding him with a chemical dye and sending him fleeing back into the Alps. Chamelegon and Gigan then attacked relief efforts trying to bring food into the country. Following Japan's continued refusal to surrender to the Titan Aliens, the space monsters attacked Tokyo, but were soon halted by Godzilla, who burrowed from out of the ground after having learned to cope with his lack of eyesight. Godzilla proceeded to defeat them, foiling the aliens' plans of conquest.
Chamelegon's exterior would have been composed of an alien metal, making it invisible to the naked eye.
Chamelegon would have possessed the ability to fly.
Chamelegon could draw Godzilla to a desired location by emitting an ultrasonic frequency.
- Chamelegon shares its name and even certain story beats with another invisible monster created by Hiroyasu Yamaura, who appeared in episode 17 of the Tsuburaya Productions series Mirrorman, "Mirrorman is Ensnared in a Trap".
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