Sonic squares off with Dark Oak and his army of Metarex.  Meanwhile Tails reports that the Blue Typhoon has been surrounded by Metarex battleships. Cosmo uses the code she deciphered to swipe the Metarex’s emeralds and release the Planet Egg. When the Metarex realize what has happened they open fire on their own fortress, hoping to destroy Sonic and the others along with it. Chris is able to nab Eggman's emeralds, so all seven are now together again. Sonic and Shadow proceed to have a Super Showdown.