Ok, after play the game 9 hours I' finnaly get the 7 chaos emeralds, and..

The only way to turn in to super sonic is to get all 7 chaos emeralds and 100 on each in story team sonic, team dark,team rose,team choatix....

How to transform into supersonic,you have to go to 1p then story when your in team selection go all the way to the right then select final.The story continues metal sonic shows up then transform into Metal Madness.All the teams have gathered,the fight begins.First up is team rose in the fight amy is usless same with cream.that leaves big only he can hurt metal sonic.The platform were you fight there are two boxs in those boxs are two team blast.theres a orb when its blue amy,espio,and shadow cant attack.When red big,omega,and vector then yellow cream,rouge, and charmy cant attack.you face metal madness with team rose,dark,and chaotix.
After you beat metal madness.He transforms one last time!Meet Metal Overlord,theres only one team left and thats team Sonic when you go super on the freak (which who can fly thanks to his transformasion) its not only sonic but tails and knuckles go super with him.I wasnt to impressed with the looks of tails and knuckles in there super form, they only have a bubble around them.Use sonic when he shoots ice from his chest,swicth to knuckles when metal sonic throws one of eggmans ships ,then tails when he shoots missles.You cant attack metal sonic with your Physical moves.the only way to hurt metal sonic is with team blast 5 times. Get the balloons they have rings ,you need to wacth your ring count if it reaches 0 you lose.Good luck trust me I have a A-rank happy cheating.

To get to meatal sonic you need to collect 7 chaost emrald(s) with every team. p.s. you can jump out of the stage/glass thingy[video][/video]