Mega Houndoum moved because it's a good way to take advantage of the rise in Psychic-types and Gengar, as it checks both, while being a 100% counter to SubWoW Gengar and Mew, which is great. It also has a fantastic Speed tier that lets it outspeed most of the tier and hits pretty hard with just its STABs and Nasty Plot.
Mega Absol is too frail and easy to check to be in C+, while also struggling to switch unMEvolved into the threats that Mega Houndoom can, such as Gengar and Mew, because it's afraid of WoW. Landorus-T, Fighting, and Fairy-types make Absols' life harder (Azumarill, Clefable, Keldeo, Terrakion), where Mega Houndoom covers most of them between Fire Blast and Hidden Power Grass / Fighting.
Already explained Doublde in C+.
Ferrothorn dropped because the metagame is prepared for it, with magnezone and special attackers using HP Fire being everywhere.
Landorus dropped because it's hard hitting ability is less needed as the metagame becomes more offensive, while its only good Speed becomes a bigger flaw. Also, it competes for a teamslot with Landorus-T, adding a significant opportunity cost.
Magnezone moved because it can trap most relevant Steel-types between its Scarf and Air Balloon sets, while also providing defensive utility by checking birdpsam, Mega Gardevoir, Clefable, and SD Mega Scizor.
Landorus-T stayed in A+ because it doesn't excell in a single role as much as the other Pokemon in S rank do and lacks versatility in comparison with the Pokemon that are in S rank mainly because of their versatility, such as Mega Charizard X. Both of Landorus-T's sets are dead weight against stall teams outside of the U-turn chip damage, and none of them is especially good offensively or defensively in general, at least not enough for S rank. Scarf Landorus-T is the best scarfer true, but it lacks a spammable STAB and needs to predict correctly between the move that KOes the opponent and U-turn to not give up momentum, a problem many of the S rank Pokemon don't have (Specs Keldeo has Scald, Azumarill and Thundurus's most effective sets are not choice locked). And of course there is the opportunity cost in being unable to run Landorus-I.
Blissey stays in D because of this:
ben gay said:
-idk how the thread got into a chansey+blissey debate even though its been refuted countless times but w/e. sure chansey has alot more physical bulk than blissey, but as far as stall is concerned, blissey is not knock off prone and lefties is rly helpful in regards to sandstorm, status, and hazard-stack double switches(which is the most common way offense deals with stall). blissey has passable sp atk so that it can run flamethrower/ice beam which is kinda noteworthy i guess(0 SpA Blissey Flamethrower vs. 0 HP / 0 SpD Gengar: 65-77 (24.9 - 29.5%)-isn't stalled out by gengar too which fks most stall teams :o). but what it comes down to is the team you are using it with. do u need a secondary physical wall that can take on things like mega pinsir,gyara, or land-t so that u can twave/toxic it? or can you afford the loss in bulk for added longevity. blissey isn't completely unviable in ou and D or C- would fit it best.
Breloom moved because it's getting easier and easier to check after sleep has been activated, as outside of Amoonguss and Mega Vevusaur, Pokemon such as Mega Heracross and Mew, that have risen a lot in usage over the past months, easily wall it. It's also much easier to anti-lead, with Jolly Mega Heracross and Fake Out Mega Medicham rising in usage. SD + LO is potent but the metagame hasn't adapted to this set yet, so it will stay in B+ until we see how the SD set fares in a metagame prepared for it.
Mandibuzz moved for reasons that i already mentioned, and everyone agrees with this so i won't say anything else.
Mega Aggron moved because it's quite a bit inferior to Rhyperior outside of checking Fairy-types, such as Azumarill, Mega Gardevoir, and Clefable. Rhyperior has a much better typing for a physical tank, better STABs, Lefties, and doesn't occupy your moveslot. Mega Aggron is more or less one whole rank less viable than Rhyperior in this metagame, and i would only use it over it if my team was Fairy-weak.
Salamence stays in D because nobody has presented a really good reason to use it over other Dragon-types with late-game cleaning abilities. Moxie Outrage is cool and all in theory, but i would prefer a much initially stronger Outrage, useful resistances, and the ability to fuck up physical Ground-types with Ice Beam that Scarf Kyurem-B provides. Or, Scarf Garchomp's superior STABs, bulk, and typing. Or, CB Dragonite's superior wallbreaking, defensive, and revenge killing abilities. Almost completely outclassed, stays in D.
Albacore made a pretty good case for Tangrowth rising somewhere in the last pages, and so it did. Ben gay also vouched for it, so that's all i need.
Celebi moved because most of you guys seemed to agree about it, plus its Speed, Nasty Plot, ability, support movepool, and Psychic typing are big pros over Amoonguss, Ferrothorn, and Mega Venusaur.
Politoed move because rain teams benefit from the increase in offensive teams, against which rain teams fare really good. Also, rain teams are getting more versatile, which helps.
Sylveon moved because it's defensive set fares better than Clefable against offensive stat boosters and Sub users (Sub Mega Hera, Mega Gyarados, NP Thundurus, Sub Kyu-B, SD Garchomp, SubCM Keldeo, Sub + SD Terrakion, Sub Mega Medicham), and because its Specs set is good enough for B-.
I only posted the decisions that were agreed on by the majority of the people that posted in this thread and the people i talk with outside of this thread. Everything else was included in the list below.