The Story begins as Sonic goes to search for Eggman around the South Island, by collecting Chaos Emeralds. Sonic arrives in Angel Island and he sees a Robot named, Metal Knuckles, and Eggman built the Egg Rocket which will go in outer space, so Sonic goes in and finds Eggman. Later he finds Eggman and chases him outside and defeats him.
Bad Ending: After Sonic defeats Eggman, Sonic doesn't have enough chaos emeralds. He falls down to Earth and is caught by Tails in his Tornado.
Good Ending: After Sonic defeats Eggman, he collects all the chaos emeralds and he turns into Super Sonic and chases Eggman onto the moon for his first time. After Super Sonic defeats Eggman and flies off the moon, Tails, Knuckles, and Amy wondered what happened to Sonic, so Tails goes to search for Sonic a few days later. He finds Super Sonic who came from the moon, as Tails waves to him.