Yeah A's too huge. Agree with everything alexwolf said regarding those four moving down, never ever have I had an issue with any of those, but I'll go in depth with other Pokes I feel can move from various ranks (a lot)
-Azumarill to
A+
This thing is one of three viable fairies, one of which being next to useless until it Mega Evolves. Azumarill is one of those few Pokemon that are incredibly easy to fit into a team, and is easily the best offensive Dragon counter. Only weak to Electric, Grass, and Poison, leaving it with only one reasonably worrisome weakness (elec) and two other weaknesses that are easy to take care of. Huge Power gives it 436 atk at max investment, which is more natural power than fully invested Landy-T. Hard-hitting priority with Waterfall and Play Rough is very good coverage, and it also has access to Knock Off which everyone knows how good that is. Also can Belly Drum and has access to Superpower, Aqua Tail, Brick Break, Body Slam, and has base 100 HP which means those coveted 101 HP subs.
-Landorus-T, Mandibuzz, and Mamoswine all can move up to
A+.
There isn't much to say to go in-depth for these, they all have pretty apparent roles and they're all very useful and important. Landy-T is one of the best offensive pivots in the game, and helps with Intimidate. Mandibuzz is one of the few reliable Aegislash counters, can Defog, can shut down Set-up sweepers with Foul Play, has Knock Off, Whirlwind, and Tailwind for utility, and has Roost and Toxic. Insane bulk on both sides and doesn't have to worry about attacking stats. Mamoswine you can see above, only thing holding it back is inability to reliably stand against Rotom-W.
-Things to be moved down to
A-:
Gyarados (both), Terrakion, Latios, Greninja, Keldeo (see above), and Conkeldurr.
Gyarados (both):
It's really hard to come up with a worthwhile argument on paper to say why Gyarados isn't worthy of A ranking. In practice, it's insanely easy to fit on an electric or rock type move to deal with normal Gyarados and the weaknesses just increase when you add on Dark in Mevoing. You don't have to worry about using certain EV spreads or moves for Gyara let alone run dedicated counters for it because it's so easy to prepare for in general when team building. Intimidate is not exactly bad, but Rotom-W is so common that Gyarados has a hard time coming in without thinking of Rotom waiting for it. It's still a very good Pokemon, just easy to not worry about Gyarados when in game when some things in A prevent you from wanting to use certain moves (Bisharp) or aren't as easy to naturally prepare for (Gengar).
Terrakion:
His typing isn't this end-all combo it used to be. Commonly runs choice, and very easy to switch in a Steel type on Rock moves and a Ghost or Flying type on Fighting moves. Nice counter to Dark types, but so are fairies and other fighting types. Still very powerful, but when you are weak to Ground, Water, Fairy, Steel, and Fighting and 108 is just under the new premier speed tier in 110 he just isn't getting it done like he used to. I would use lots of other Fighting types before him.
Latios:
There's a reason Latias isn't listed here, she plays a different role which is much better. Latios is supposed to be a powerhouse, but he's so incredibly easy to play around it doesn't matter. My personal team's biggest weakness is on paper Latios and I've never had him be able to KO anything before. Fairies and Darks are rampant, rendering both his STABs useless. HP Fire isn't as powerful anymore, and Thunderbolt is easily stopped by grounds. Only reliable coverage he has that isn't blocked is Surf. Easy to force out by playing with these types and isn't bulky enough to take a hit. I'd run lots of other Dragon types before him. Strongest Specially based Dragon gives it ability to stay in A-, but he's just ineffective compared to lots of other mons around and above him. Latias at least has enough bulk to be worthwhile.
Greninja:
Has anyone actually looked at a teambuilder and said "Oh crap man Greninja is gonna be so hard to kill"? He's incredibly frail, isn't strong enough without being choiced or LO'd, and his "mindgames" with Protean are way easier to get around. Everyone knows what move Greninja is going to be using when he comes in on you, and most mons run moves to cover types that are good against them. You can actually abuse Protean so stuff like Charizard can come in safely and kill where he normally wouldn't be able to against water types. He's naturally frailer than Infernape, just to put that into perspective. He's fast and has infinite STAB, but it's just become too easy to play around and he's way too easy to revenge kill. Not that high on him.
Conkeldurr:
He's supposed to be this super bulky status absorber with Guts and Assault Vest but in practice he struggles to do a lot of damage. Mainly only good for picking off weakened mons. Definitely a threat, but lack of coverage or offense boosting item kind of hurts him. Fighting is just Talonflame/Pinsir lure too, which is never good. Still a good mon, just not A Rank in practice.
-Various crap making minor movements:
Clefable to
B, Hippowdon to
A-, Mega Gard to
B+, Slowbro to
B+, Tornadus-T to
B+, Crawdaunt to
B-, add Slowking to
C-
Clefable has been complete crap every time I've gone up against it. I don't know if it's been the people using it or what, but it was deadweight. Easy to 2HKO and major set-up bait. Hippowdown was discussed above. Mega Gard actually is way more scary than I thought it would be when you go against it. You have to play extremely cautiously or it will punish you. Can easily net OHKO's against various mons. Slowbro is fantastic, sets can range Defensive to Choice Specs. Incredibly versatile and very good natural bulk and decent attacking stats. Tornadus-T is still a monster, U-Turn with Regenerator is not something to undermine. Can no longer rely on Hurricane being 100% accurate all game but still threatening nonetheless. Crawdaunt is a powerhouse only held back by speed. Very good at wall breaking. Slowking is a bit difficult to explain so I'll let the
analysis do that.
List is a still a slight bit bulky in some places and lacking on other ranks. We should fix that.
