JDG-00X Devil Gundam/Bio & Battles

The JDG-00X Devil Gundam, also known as simply the Devil Gundam or as the Ultimate Gundam is the main antagonist in Mobile Fighter G Gundam. Created by Raizo Kasshu and his son, Ryoji, the machine was a marvel of technology, able to evolve and replicate itself. The Kasshus intended their creation to save and rejuvenate the ravaged Earth, but it was stolen from them and crashed into Earth. As it repaired itself, its artificial intelligence directed it to view humanity as one of the ills plaguing Earth, and it made plans for the eradication of the species.

It moved behind the scenes, infecting notable Gundam fighters with DG cells as the 13th Gundam Tournament neared. As the DG cells parasitized its victims, they also fell under its control. While its core, the body of Kyoji Kasshu, was killed by Domon Kasshu, the machine was given a new core in the form of Rain, Domon's love interest, and resumed its attacks anew. Domon rescued Rain from the Devil Gundam's clutches, and the pair destroyed the Devil Gundam permanently.