Final Egg

The Final Egg was a base of operations for Dr. Eggman, based in the Mystic Ruins, that existed only in the altered timeline created by the Super Genesis Wave. Eggman was said to have used the base during his plans that involved Chaos, and that Sonic the Hedgehog had once infiltrated the base. All that remains of the base today is the entrance to the bridge that led there, which still stands on the cliff at the edge of the jungle. (StH: #253)

Background Information

 * The Final Egg was a level from the game Sonic Adventure.