The JDG-00X Devil Gundam (Dark Gundam in the English Dub) was a Mobile Fighter in the anime television series, Mobile Fighter G Gundam.
The Ultimate Gundam was created in the space colony of Neo Japan by Dr. Raizo Kasshu and his eldest son, Kyoji Kasshu, with the noble purpose of restoring the Earth through the use of nanomachines. The Ultimate Gundam's nano-technology was incredible; capable of self-evolution, self-regeneration, and self-replication which would heal the Earth after it was ravaged by so many years of war and misuse. However, shortly before the 13th Gundam Fights were scheduled to begin in the year Future Century 60, the Ultimate Gundam was stolen, and Mikino Kasshu, Raizo's wife, and Kyoji's mother, was murdered. The alleged culprit was none other than Kyoji Kasshu, who fled to Earth with the Ultimate Gundam with the Neo-Japanese Military in hot pursuit. The Ultimate Gundam was severely damaged by the atmospheric re-entry, and it crash landed on Earth.