Sonic the Hedgehog 2

Now settled in Green Hills, Sonic is ready to prove himself as a true hero. But when the devious Dr. Robotnik returns—this time with the formidable Knuckles by his side—Sonic faces his greatest challenge yet. The villains seek an emerald with the power to obliterate entire civilizations, and with the fate of the world at stake, Sonic joins forces with his new ally, Tails. Together, they race across the globe on a high-speed adventure to secure the emerald before it falls into the wrong hands.