Prior to the game's events, Doctor Eggman builds a robotic assistant named Gemerl, using parts from the robot Emerl who was destroyed in Sonic Battle. Eggman attempts an experiment using the Chaos Emeralds to perform the Chaos Control technique, but it goes awry and tears the world apart. This action separates Sonic and Tails from Amy, Knuckles, and Cream, all of whom Eggman finds and captures, intending to create a segment of his impending empire on each chunk of the planet. Sonic and Tails travel through the game's seven levels to recapture their friends and retrieve the Emeralds.
The final boss fight takes place at the Altar Emerald temple. If the player defeats Eggman there without having all seven Chaos Emeralds, Eggman and Gemerl escape and fall off the edge of the temple. Peace is restored to the world, and Omochao snaps a picture of the five heroes. However, the game alerts the player that the Emeralds must still be collected for the true ending. If the player defe...
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