The Egg-Gantor was a massive robot created in the image of Dr. Eggman and used by him in his plot involving an army of artificially created Chao. After unveiling it at his base, Eggman took it to Station Square and demanded that the populace make him emperor. However, Chaos used the positive energies of the seven Chaos Emeralds to grow to giant size and challenge the Egg-Gantor, defeating it with relative ease. (SX: #6)