User blog comment:Speedy7850/Userbox Request!/@comment-101.160.206.120-20120605045749

I making my own comment here

Metal Sonic upgrade himself by coping Sonic, Shadow and Silver's data but also get Tails' tails, Knuckle's strength and spikes and finaly a retractab sonic cannon.

But he won't because then he defeat Sonic unless it's super sonic