Replying...
Intro. You are Metal Sonic and you have a voice box to speak, you have always been Eggman's right hand man but one day he wanted to replace you with another robot and you rebelled against him because you didn't want to be useless scrap and now you have to join Sonic and his friends but... Can you redeem yourself? You continue with the story...

Metal Sonic's Redemption

@Metal sonic