Final Egg

The much-grown Sonic faces a new threat: the mighty Chaos monster. Dr. Robotnik frees this monster from Master Emerald by destroying it (which causes the fall of the Angel Island with the Ice Cap on it) with the hope that Chaos will help him build his empire. Chaos can absorb Chaos Emeralds and become stronger, so Sonic teamed up with Tails and after giving Robotnik the nickname Eggman, sets out in search of Emeralds. During his adventures, Sonic repeatedly battles Dr. Eggman and at one point finally faces the villain in a final battle at his Final Egg base. Final Egg also becomes the place where Amy searches for the family of a lost birdie and where the E-102 Gamma robot, along with the other E-series robots, is trained under Eggman’s control. In the process, the heroes are contacted by a mysterious red spirit, apparently trying to help in the fight against Chaos.

In the end, Chaos manages to absorb all the Chaos Emeralds and becomes Perfect Chaos, flooding all of Station Square. The red spirit that has been with the heroes all along materializes next to Sonic, turning out to be a girl who lived many years ago named Tikal. Tikal was a friend of Chaos, but she saw no other way but to re-seal Chaos into Master Emerald forever. Sonic flatly refuses this option and believes that this approach won’t solve the problem because Chaos’s hatred won’t go anywhere. By using the positive power of the Chaos Emeralds Sonic becomes Super Sonic and defeats Perfect Chaos in battle. The weakened Chaos speaks to Tikal, and she manages to extinguish the pain and rage of the distraught monster. After thanking the heroes, Tikal and Chaos return to Master Emerald and Sonic doesn’t stop on his adventure. Angel Island, on it’s part, returns to the sky again.