Sonic the Hedgehog 2

After Sonic settled in the town of Green Hills, he was eager to prove that he had what it took to become a true hero. When Dr. Eggman, with his new partner Knuckles, returned to find an emerald powerful enough to destroy human civilization, he faced another severe test. This time Sonic teams up with his own sidekick, Tails, and embarks on an adventure around the world in hopes of finding the emerald before it falls into the wrong hands.