@Dante
I'm lost. How was Proto Man "way stronger"? I understand it's Pre-MMV, but still. Was it based on Mega Man 3 and how he played the role as Mega Man's guide or mentor? Or perhaps it's based on the fact he's Mega Man's senior? I mean naturally from those things alone we would logically conclude that he's vastly stronger than him, but where are the exact feats or statements that say he's much stronger overall? I have the impression he's stronger too based on the aforementioned reasons, but right now it seems like we're just assuming he is since he plays said roles for Mega Man. To make things harder, their interactions are very limited and there was the discussion we had a while ago that both of them held back in their fights. It's not clear cut who's stronger at this point. Is Proto Man more experienced and hardened? Yes. Does he have advantages that puts him above in Mega Man in some aspects? Yes. But to say who's clearly stronger than who is complicated at Pre-MMV with what little information we have concerning the two compared to each other.
@Lunge
I still don't think so. Even if Proto Man was much stronger, there still isn't anything there to suggest that Dark Man was weakened, especially when he fought Mega Man immediately after getting his disguise destroyed without issue and had full health. Also, Mega Man didn't get amped per se, he just got upgraded overall via better feats in MMV that made him stronger from that point onward.