Board Thread:Speculation, Theories, and Rumors/@comment-34518800-20150509005546/@comment-477304-20150518152810

Uxiea wrote: If there was, the rivalry and contrasting dynamic between the Metal and organic Shadow would be nowhere as interesting as Sonic and Metal Sonic's. The idea's done so I don't see the necessity for a Metal Shadow anytime soon. I think you've hit the nail on the head there. That's probably the reason why we haven't seen Metal Knuckles or the Tails Doll since Sonic R.