Man... That Metal Sonic is a real idiot to me, more so in the arcade game Sonic the Fighters. Basically in that game, he proves to be utterly annoying and downright impossible to KO, as he just keeps attacking you, grabbing you and taking away MASSIVE amount of your health non-stop, leaving you to no easy avail in defeating him. He's also just as bad as even the next opponent to follow - Dr. Eggman. Metal Sonic doesn't even fight you fair, and Robotnik is actually easier than him, since you are given hyper mode (regardless of being Super Sonic or not) to be able to constantly hit without a limited punching combo. Otherwise if that didn't appear to help you out, you'll be smacked to death easily by Eggman too.
I want Metal Sonic to either be punished or at least be a bit more reasonable in battle so that you wouldn't find him to be a difficult lunatic to deal with.
Also, Metal Sonic is just like Vile from Capcom's Mega Man X games. They're both war machines who will beat up anyone that stand in their way.