Story
The story picks up where sonic 3 left off. After disrupting the death eggs re-launch sonic and tails head back down to angel island. Knuckles still believes Dr. Robptniks story and is persistant in keeping sonic and tails at bay. But eventually sonic and tails evade all of knuckles' traps and they meet up in the sky sanctury zone. Here sonic beets the S@#~ out of the echidna, knuckles tries to escape but sonic pursues and the pair reach the master emerald chamber in time to see Dr. Robotnik stealing the master emerald. Finally knuckles is on sonics side, but they are too late Dr. Robotnik has launched the death egg oncemore. Sonics, though by now had all of the chaos emeralds and transformed into super sonic and flew into space after if. With the joint forces of super sonic and knuckles firing lazer beams freom the island using the ancient echidna technology they destroyed the death egg and super sonic descended back to the island with the master emerald. With the death egg off of it and the power of the master emerlad, Angel island rose back into the sky again.