Manaphy to S
Manaphy is really, really good right now in CAP and has been for way too long to be A+. This thing breaks balance apart so easily, plowing through Tomo/Colo/Clohm cores with ease, which is 80% of balance. Its best set is probably Tail Glow/Surf/Ice Beam/Psychic, which can break through a lot of typical counters like Mollux and Plasmanta, who can deal with a lot of other waters (Thus clearing the way for Azu, Navi, etc.). Aurumoth's presence only makes Manaphy happier, and that core is absolutely devastating to every balance team in the tier.
Mega Sableye to S/A+
A- is a crime. That's absolutely atrocious considering how well stall does in this metagame, even with the recent banning of Gothitelle. Sableye is the only bulky Magic Bounce user available, it can spinblock against Colossoil (This is one of the reasons stall is so damn effective), it spreads burns like wildfire, and absorbs so many Pokemon that would otherwise trouble stall, like Mega Metagross. This mon is the cornerstone of almost every stall team (Does anyone else use stall?) and the rank ought to represent that.
Not to mention it has great utility in balance and certain hyper offense teams, especially Trick Room, which is the best use of Calm Mind sableye in my opinion.
Colossoil to A+
While perhaps the most splashable the and most used pokemon in the tier, I can't justify S rank for him. He lacks recovery, he lacks variety in sets with only two great sets unlike his nemesis Tomohawk, and he isn't quite as much a nuke as Char-X nor a setup sweeper like Altaria. He does hit hard, and he does have great bulk with Assault Vest and enough utility attacks to abuse AV well, but I find it on par with A+ rank monsters like Aurumoth and Cawmodore. He's just not S rank when the Pokemon that walls it so extremely well is in S rank as well, and other Pokemon such as Pyroak, Skarmory, and Gliscor are fairly common as well.
Mega Gallade to B
This thing is hard to even use when Mega Medicham exists. It's not that great of a setup sweeper when Cyclohm is everywhere to paralyze it or phase it out, and it's overshadowed by better physical sweepers such as Altaria, Char-X, DD Aurumoth, and Mega Pinsir. Its bulk is mediocre at best with a typing that lends it no favors, letting it be easily revenge killed by Talonflame, Azumarill, Cawmodore, Scizor, and many more after just a little bit of prior damage.
Krilowatt to B+
This thing has more super effective coverage than anything else in the tier, and this makes it surprisingly powerful despite only having 84/83 offenses. It's rather hard to switch into as well, making it quite effective as a support attacker and can even lure some things with Hidden Power Fire. However, it's not as fast as it wishes it could be, so Diancie and friends can revenge it. But all things considered, it's really powerful right now and is plenty good enough for B+.
I'll add more to this later when I feel like it