Sonic races to Old Megaopolis, Power Ring in hand, with Tails in the Tornado at his side. Minutes ago at Castle Acorn, Sally suggested that taking a Power Ring would allow him to reach the city before Dr. Eggman could launch his nuclear warheads at Knothole and Station Square. King Acorn explained that he would send one group to rendezvous with Sonic and another to stop Eggman's minions from destroying Robotropolis' force field. At Old Megaopolis harbor, Dr. Eggman asks A.D.A.M. to begin the countdown when Sonic and Tails arrive on the Tornado, ready to fight.