Metal Knuckles (メタルナックルズ Metaru Nakkuruzu) is a character that appears in the Sonic the Hedgehog series. It is a robot created by Dr. Robotnik in the image of Knuckles the Echidna. It was used during the first World Grand Prix incident to counter Knuckles' participation.
All of the fictional evil counterparts of our beloved heroes have had enough being in their shadows, so they all unite together and make their voices be heard!
