This is metal sonic and he interrupted your fight with shadow (your sonic btw). Dr eggman has upgraded metal sonic so he was much stronger, faster and more intelligent then before and is determined to kill you as he is no longer working for dr eggman. About metal sonic: he is sadistic, doesn't care about friends as he believes that they are a "weakness" and is determined to kill sonic the hedgehog (you) About sonic (you): a blue cocky hedgehog that never takes things Seriously unless it is his friends that are in danger, abilities: sonic wind, super sonic (more of a form but ya), spin dash, homing attack

These are the three strongest hedgehog on planet mobius, sonic, shadow and silver. These three just finished defeating dr eggman as he has recreated the death egg but made it stronger, Normally the eggman was successful in defeating sonic and shadow which destroyed Silver's future so he decided to go back in time to recreate the future and prevent eggman from winning again. Be whoever you'd like and have fun.