User blog comment:Bionicleboy3000/Metal Sonic: The most overpowered robot in fictional existence?/@comment-3190872-20130108021655/@comment-115265-20130108212409

Metal Sonic is a sentient robot, remember. And I find the fact that he's not an alien to be rather irrelevant. After all, it took a super form to defeat Metal Overlord, where it otherwise would have taken just the standard form to defeat M.S., otherwise.

And again, he's liquefied himself in Heroes. Clearly copied from Chaos. If that doesn't mean he's able to copy physical attributes as well as combat skills (He's nabbed Silver's ESP ability before, among other things), I don't know what does. He's used the liquid form to copy data, I don't see why he couldn't use others to do the same.

The success rate really is irrelevant, primarily because of one of the general rules of writing fiction: the good guys always win. There are exceptions to this rule, but the Sonic the Hedgehog game universe isn't one of them.