He constructed it out of the either recovered or rebuilt Egg Fort, Egg Fort II and Egg Carrier. It was used to try to take over the world after Eggman was warped back to their world. It was badly damaged by Amy's Piko Piko Hammer, and then released a tracking missile on Tails in the Hyper Tornado. However, it was destroyed by Super Sonic when he warped there using Chaos Control. The Grand Egg Imperial was then destroyed in a flash.