... but I've been toying with this idea since forever.
I made a full chart of every single enemy in Mega Man 3 (all 40) and how much damage each weapon causes. Since weapons in Mega Man games rarely have absolute value in comparison, the number next to each weapon shows how many shots it takes to kill the enemy.
I know it's borderline insanity, but I actually had a lot of fun doing this and wouldn't mind seeing more. I found out interesting bits about enemy-weapon interaction in MM3, like how pretty much half of Wily's lesser army have an exclusive weakness or a very recommended counter, keeping in line with the premise of the series. If you were ever looking for proof that Top Spin is a powerhouse, well, 19 out of 38 OHKOs is a fine number.
Enjoy!
Chart 1Chart 2Chart 3Chart 4Chart 5Chart 6Chart 7Chart 8Note: For the bullet-like enemy in Snake Man's level, one extra hit per weapon is necessary in order to dispose of the cloudy cloak.
Another note: If you're curious about how much damage the regular P weapon causes, just look at the Needle Cannon. They both deal the same exact amount of damage to regular enemies.
(Also, if this has been done before, please just politely whistle and nod along!)