Sonic and Amy land on Magenta Island, where Tails and Knuckles are dropped off. Dr. Eggman and Fang the Hunter arrive shortly after. In this story, Sonic chases down Eggman to thwart his evil plans in Palmtree Heights, while Amy faces off against Fang in Angel Paradise. This is how they plan to defeat each foe. When Eggman and Fang head to the top of the Egg Drought at the bottom of Cosmic Station, you will collect all seven Chaos Emeralds.