Suggested by Anonymous Rimuru Tempest is a pretty tough being whose strength and speed are almost off the charts. I actually think he’ll give Mega Man a reasonable run for his money. The fact that Rimuru has regeneration also helps his case as well. Still, Mega Man has proven himself time and time again to be incredibly durable. I think coupled with his large array of skills and physical abilities, Mega Man should still have the edge in this fight. Mega Man wins.
Update 10/18/2020 Mega Man won’t be able to keep up with Rimuru’s speed. Mega Man is fast in his own right but just a little out of his league here. Rimuru Tempest wins.