is the villain in the Famicom RPG game "Mother", and the Super Famicom RPG "Mother 2" ("EarthBound" in the U.S.). Known as both the "Embodiment of Evil" and the "Universal Cosmic Destroyer," Giygas is an evil alien that intends to sentence all of reality to the horror of infinite darkness. With an army of Starmen, UFOs, and other deadly war machines, Giygas also used his immense power to influence the evil parts of the Earth's beings to assist him. Wikipedia
The definitive Wikipedia entry for Giygas. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Giygas