Next up in the AU redesigns, every story needs its villain, here he is! The main man himself, Dr Robotnik! (Yes he still goes by robotnik instead of eggman).
And along for the ride, is his latest and greatest creation, Skarlet Metal!

Incase there's any confusion for the name, this "Metal Sonic" isn't really a copy of either of the hedgehogs, he's his own machine, born from eggmans pure unrelenting hatred for all his enemies. This metal is the result of years of hate, defeat and desperation, poured into one lethal machine, with the speed of sonic, the power of shadow and the smarts of tails, this metal is not to be taken lightly, robotniks ultimate killing machine. (Oh yeah, and incase you're wondering, yes robotnik DOES have a metal hand, some plot stuffed happened and, during his years in hiding, he had to make himself a new hand.)