Knuckles the echidna, Miles Tails Prower the fox, Amy Rose the hedgehog, Team Chaotix, Team dark, Cream the rabbit, Cheese the Chao, and Vanilla the rabbit, have to turn Sonic back to normal after Dr. Eggman transforms Sonic into a giant, not only did he transform Sonic into a giant, he is also controlling him, so yeah, Sonic is going to do as he says. Can they turn Sonic back to normal or is he gonna destroy the whole city?