Movie Story : After settling into life in Green Hills, Sonic is anxious to show that he has what it takes to be a real hero. His chance arrives when Dr. Robotnik comes back with a new ally, Knuckles, and both are hunting for an emerald powerful enough to destroy entire civilizations. Sonic joins forces with his loyal friend Tails, and the two set off on a journey across the globe to recover the emerald before it can land in dangerous hands.