I'm wondering if anybody's got S-Ranks in Mischief Makers in particular, but if you wanna talk about Contra: SS, I won't stop you, either :)
So far I've played the game about an hour (it's been YEARS since I played the game and I'm so much better at it now!) and managed to get A ranks with the gold star on all first nine levels, with four B ranks in there. I think I'm very close to an A or maybe even an S in 1-3, which would be the Clanball park.
(Did I mention this game is incredibly funny? Yes...)
(It's also one of those games that doesn't let you skip cinematics, no matter how many times you've seen them...lame)