With all the Challenge Acts of the Dreamcast Era cleared, Sonic runs into his old rival Shadow the Hedgehog. It seems the Ultimate Life Form woke up on the wrong side of the capsule and is determined to take Sonic down once and for all, but our hero is more than up to the task of racing the faker. With the rival battle complete and the Yellow Chaos Emerald secured, the Boss Gate is opened and Sonic must once again face the mighty Perfect Chaos. This time around, Sonic does not have the ability to transform into his Super state, so does he have any chance of victory?