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

I must say I disagree with this completely. Metal Sonic may be powerful, and he is in fact my favourite Sonic character, but he's far from the most powerful in all of fiction. For starters, you base his power on the fact that he can essentially steal combat skill from other people. Not only is his copy ability slow and impractical, it also fails to mimmick its target completely. Metal Sonic collects data, and uses his findings to "copy" his opponents abilities, which he must then generate himself. He couldn't copy the Hulk, as you mentioned, because his power his based on physical strength and rage, which a robot could only hope to emulate. He couldn't copy Superman's invulnerability because he's a robot, not an alien. This list goes on for far more than just your examples. Metal Sonic's copy ability simply isn't that good.

Next is a more tangible factor, his success rate. Numerous other robots and machines in fiction, whether it be popular or obscure, have succeeded in conquering and/or destroying the world. Metal Sonic has repeatedly failed to defeat an anthropomorphic rodent, let alone kill him. He's simply incapable of achieving such a goal.

And there you have it. Again, Metal Sonic may indeed be a very powerful robot, but he pales in comparison to so many others.