It was actually neither MK nor IC that killed Brawl. The reason Brawl died was a.) the Melee community and b.) the release of smash 4.
But Sheik [main] + Diddy [secondary] is pretty clearly the strongest known combination of main and secondary right now. The only matchup Sheik arguably loses is Mewtwo, who happens to have a dreadful tournament record against Diddy. Diddy's also easy enough to play to make him a good pocket character in general. And the few characters left that can give both of them serious trouble - Rosalina, Lucario and Sonic mainly - happen to be solidly covered by Cloud who is easy enough to play to be used as a tertiary character and still do fine with him. But that's just in case you don't like even matchups 'cause that's the worst thing you'll ever face with Sheik + Diddy.
I generally don't even take Cloud into serious consideration anymore because the character just doesn't work out solo and as I pointed out above he's easy enough to play that just about every combination of main and secondary character can be enhanced by a Cloud tertiary - even if only just to deal with Sonic and Rosalina, two notoriously awkward matchups to cover. There simply isn't any reason to not have a pocket Cloud ready even though I see him on the lower end of the top 10 more and more.
I don't think Bayoneta's matchups are fleshed out enough yet to make a clear statement. We'll just have to see how it goes.So what you are saying is....
Sheik/Bayo team if anyone is serious about the game?
Or Sheik/Diddy?
But Sheik [main] + Diddy [secondary] is pretty clearly the strongest known combination of main and secondary right now. The only matchup Sheik arguably loses is Mewtwo, who happens to have a dreadful tournament record against Diddy. Diddy's also easy enough to play to make him a good pocket character in general. And the few characters left that can give both of them serious trouble - Rosalina, Lucario and Sonic mainly - happen to be solidly covered by Cloud who is easy enough to play to be used as a tertiary character and still do fine with him. But that's just in case you don't like even matchups 'cause that's the worst thing you'll ever face with Sheik + Diddy.
I generally don't even take Cloud into serious consideration anymore because the character just doesn't work out solo and as I pointed out above he's easy enough to play that just about every combination of main and secondary character can be enhanced by a Cloud tertiary - even if only just to deal with Sonic and Rosalina, two notoriously awkward matchups to cover. There simply isn't any reason to not have a pocket Cloud ready even though I see him on the lower end of the top 10 more and more.