Months after Sonic's first victory, Robotnik has devised a plan to obtain something that could give him unlimited power, and he has created the perfect machine to tie up loose ends: a metallic copy of the hedgehog hero called Metal Sonic! When Eggman's fake hedgehog captures Uncle Chuck, and drives the Freedom Fighters out of their home, it's up to Sonic, his new friend Amy Rose, and the team to go to Robotropolis, stop Robotnik and Metal Sonic, and save Uncle Chuck. But Sonic needs to learn to not be reckless, for his rash actions threaten the lives of his friends.
