Ok this post is gonna be quite long so bare with me.
Rises
View attachment 304909
A+ to S:
Tran does its job and it does its job well. It’s one thing to be one of the best rockers in the tier, but it’s another being one of the best progress makers in tier, nothing can switch into it safely. Everything either is trapped by Magma Storm, hit by Earth Power, or crippled by Toxic. Considering that mons like Pex sometimes run Shed Shell and Glowing sometimes runs EQ speaks to how much of an impact Heatran has on the current meta. It’s good on its own but it’s even better when it is being supported or it is supporting whatever it is trapping something for Vinecune or being supported by Rilla.
View attachment 304910
A > A+:
Fini has caused shifts in the meta such as the rise of Power Whip Ferro, Glowking, PJab Pex, or Taunt Koko due to how prominent the CM set is against fat teams. Being able to potentially turn the tables in a battle is very similar to prominent sweepers like CM Clef and Volcarona. Speaking of, the rise of Volcarona, Lando, and Hydreigon gives Fini a solid defensive niche. Fini has other sets to play around, Scarf Fini has an excellent mu against HO while crippling bulkier teams with Trick/Knock Off. The defensive defog set is still great, being able to keep hazards off from the mighty Tran and Chomp while having utility in Knock, Taunt, Nature’s Madness, etc.
View attachment 304913
A- > A:
From the usage statistics Hydreigon is skyrocketing in usage and its not hard to see why. Being able to check the likes of Spectrier, Crawdaunt, Nidoking, Heatran, and Lando while being a solid Defogger. Not just that, but more players are starting to realize NP is still bonkers. There has also been an experimentation of other sets like Roost + Three Attacks, and Sub-Roost proving that Hydreigon is not only the best Spectrier answer in the tier, but is also versatile.
View attachment 304914
B+ > A-:
Kyurem is still goated. Between Metronome, HDB, and Specs, it is incredibly difficult to switch into. Being able to pressure stall Tran’s Magma Storms and hit it incredibly hard with Earth Power is highly valuable for defensive teams. It’s bulk means it is less likely to be OHKOd by neutral hits, and its speed tier lets it outrun non-Scarf Lando/Fini, Excadrill, Nidoking, Rilla, Tran, and other threatening offensive threats.
View attachment 304916
B > B+:
No matter what meta this mon gets thrown in, it always finds a way to be OU relevant, from it’s surprisingly good bulk, to its great defensive typing, to its ability, and to its Scald burning, Earthquaking antics. Gastrodon has always been underrated in current generations, and this is no different. Just look at the list of mons it can check/counter from S to B.
View attachment 304918(Specially Defensive Sticky Hold halts progress from Specs Mag.)
View attachment 304919(PhysD has a small chance to avoid a 2HKO from HJK after rocks.)
View attachment 304920(Clear Smog prevents a sweep from CM Clef, and if it’s Sticky Hold, it doesn’t care about Trick.)
View attachment 304921(Don’t get Toxic’d.)
View attachment 304922(Don’t get Toxic’d or flinch haxed.)
View attachment 304923(Not a counter, but it can potentially check it or threaten to burn it with Scald.)
View attachment 304924(Sticky Hold doesn’t give two shits for Scarf sets and Clear Smog handles CM.)
View attachment 304925(SpD Gastro is one of the few things in the tier that can both stay in on Zapdos and ignore Volt Switch.)
View attachment 304926(Not really important but it’s worth noting.)
View attachment 304927(Not a counter but it can sponge a hit and check it, especially if it’s SpD.)
View attachment 304928(Doesn’t really care about anything it throws out other than random Sludge Bomb poisons.)
View attachment 304930(Not a full on counter cause Grass Knot, but it can sponge one Grass Knot if SpD and check it with EQ or Earth Power after rocks and minor chip.)
View attachment 304931(Don’t get Toxic’d.)
View attachment 304932(SpD Gastro completely walls Zolt.)
View attachment 304934(Suicune can only try pp stalling it.)
View attachment 304935(Not a counter cause Specs Shadow Ball has a chance to 2HKO it after rocks, but it can sponge a hit and EQ it out of the park.)
View attachment 304936(Toxic is rare, so it’s most likely gonna wall it for days.)
View attachment 304937(Beats non-Giga Drain variants, which aren’t common rn.)
Drops
View attachment 304938
A > B+:
Unfortunately for Mandibuzz, it has competition with Hydreigon cause unlike Mandibuzz, it isn’t a defogger that relies on Boots, is a Spectrier answer that can actually beat Spectrier, doesn’t get rekt by Heatran and outsped by Nidoking, and isn’t overly passive. Not to mention Mandibuzz struggles to fit everything it wants on it. It wants to cripple things with Knock or Toxic, it wants to create momentum with U-Turn, unfortunately it can’t run everything it wants which puts Mandi in a very weird spot. It’s so easy to abuse that most players don’t give a shit about it anymore. I would rather use Corv in this meta cause it isn’t OHKOd by Chomp’s SE after a SD.
View attachment 304943
A- > B+:
Slowking doesn’t really answer to anything notable that Slowbro doesn’t other than Nidoking, Lele, and maybe Specs Mag. It’s MU against Heatran isn’t any better cause it’s still trapped by it and can’t 2HKO it back. It’s not bad but there’s a reason more people run Bro over it.
View attachment 304949
B > C+:
Deadass what does Kommo-o even do in this meta anymore. Back before DLC1 it was a fantastic rocker due to being able to beat the two best (and only good) defoggers in the tier cause Iron Defense + Body Press can plow through them, and with how good Wishport was back then it was able to stay healthy for longer periods of time in order to check Excadrill, Bisharp, non-Play Rough Zeraora, and Conk. Fast forward to Crown Tundra and notice how only 1/4 of the mons in the tier are OU relevant and the rest are mostly niche picks. Kommo-o’s niche has mostly been irrelevant for a few reasons. We have gained far better offensive rockers as of late that can threaten the many new defoggers in the tier. Kommo-O is threatened out by Torn, Zapdos, Fini, Moltres, etc. If I wanted to use a dragon type rocker that can check Tran, I’d use Chomp. Kommo-o has other things going for it like checking Cinderace, Rilla, Urshifu, Daunt, and Kart. However we start to run into problems similar to Buzzwole but worse. Kommo-o has no reliable recovery meaning it will be overwhelmed by constant hits, especially since 3/5 of the mons mentioned can Knock it and cripple it for the rest kf the game, Wishport Clef has less room on teams simply cause Urshifu is such a prominent force. Will Kommo-o get better if Urshifu gets banned? Maybe, but as of now it doesn’t have a good enough niche to be in the same rank as Volcarona, Gastrodon, and Skarmory.
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B- > C+:
Amazing vs HO but ass vs every other archetype. Every one and their mothers run bulky waters on their teams. Has a hard time splashing itself on any team other than Rain. The influx of RH, Zapdos, Iron Barbs, and Rough Skin gives it a hard time in even staying alive, let alone breaking past defensive cores. No reason this should be higher than Azumarill.
View attachment 304958
C- > UR:
How is this mon still ranked? Every good team runs either one or two fairy types, steel types, or both. Requires way too much support where it’s better to just slap a better breaker like Lele or Magearna. It’s only niche is in TR and even there it’s better to use mons that can actually make progress. Nuff said.
Volcanion C- to B- 
(Single) from A+ to S: Urshifu's rise in viability happening alongside the recent suspect test is no coincidence. The metagame hardly has enough tools to handle it. Wicked Blow + Close Combat STABs coupled with coverage for Fairy types goes a long way for Urshifu. While it is not the single fastest or bulkiest Pokemon, it is capable of getting in safely and doing lots of damage each time if it does not run into the decrasingly common Buzzwole. It clearly belongs among the best Pokemon in the tier right now. 
from A to A+: Cinderace took a bit of a drop-off upon release of DLC2 due to being overwhelmed with a plethora of other offensive options, but with the metagame settling, it is back in business. The soccer player is kicking around the tier like it has in prior metagames; the rise to A+ highlights how strong of a pivot and breaker it can be with minimal support. 
from A to A+: Landorus-T is topping the usage statistics and it has a number of strong sets, including the increasingly common Scarf set. While it is nowhere near peak Landorus-T from last generation and still not the best Pokemon in the tier -- or particularly close, it is still within the top 10 and belongs in A+. 
from A- to A: Rillaboom has been a great supporter, pivot, and revenge killer with Grassy Surge, U-turn, and Grassy Glide respectively. It has stayed strong in the metagame, even picking up usage recently due to how practical of an option it is.
from A- to A: Tornadus-Therian has proven to be a great pivot and potential win condition thanks to the combination of Regenerator and Heavy Duty Boots. While no one set is quite metagame defining, it serves as a great addition to balance structures and belongs in the A ranks. 
from B+ to A-: Corviknight does well in a metagame filled with Physical Ground and Grass types while serving the role of Defog supporter. It is not weak to Stone Edge, too, which can give it a leg up on common alternatives such as Zapdos and Moltres. Corviknight is seeing more and more usage due to this niche. 
from B+ to A-: Being able to check Heatran and Spectrier while fulfilling either a defensive utility role or a more offensively oriented breaker role can allow for many teams to make use of Hydreigon, which is finally seeing steady usage as a result.
from B+ to A-: Tapu Lele's strong specially offensive presence allows for a lot of teams to use it as a breaker; few things switch in to it and players are finally capitalizing on this, leading to a small increase in rank. 
from B to B+: Hippowdon is a great wall that can check a number of strong attackers, provide teams with an Electric immunity, set up Stealth Rock, and set-up Sand to support potential teammates. These roles allow for Hippowdon to have a consistent presence in the metagame now. 
from B to B+: While arguably inconsistent, Suicune's ability to sweep unprepared teams is second-to-none, which is more than enough for a slight increase in ranking. 
from B to B+: Tangrowth is able to check a ton of physical attackers right now. Landorus-T, non-mixed Garchomp, Kartana, Melmetal, Excadrill, Rillaboom, and Urhifu-Rapid are all struggling with a physically defensive Tangrowth. The Rocky Helmet set allows for Tangrowth to remain a great defensive option in an evolving metagame. 
from B- to B: Hawlucha has seen a bit of a revival recently, pairing well with Tapu Koko on HO and Rillaboom on various offenses as a sneaky win condition and revenge killer on teams that appreciate both of these roles filled. 
from B- to A-: Slowking-G was perhaps even better than A- with Quiver Dance Pheromosa still roaming free, but it is solid regardless as it can check all Magearna, Clefable, and Tapu Fini while providing a respectable offensive presence and soaking up Toxic Spikes.
from C+ to B: Amoonguss is able to use Spore, soak up Toxic Spikes, and check threatening attackers like Rillaboom, which allows for it to see a bit more usage and viability than when DLC2 came out. 
from C+ to B: Moltres-Galar is a potent special attacking option with strong STABs and Berserk. While it does have some rough match-ups such as Tyranitar, it is oftentimes able to carry its weight and check Spectrier defensively. 
from C to C+: Unaware option on stall teams, but stall is still not great, so it will not get out of the C ranks for the time being.
from C to C+: Rotom-Wash can be a pivot that is immune to Ground moves and able to capitalize on the various common Flying types we see in the metagame. It is seeing a little bit of usage, but it is still not particularly common enough to warrant a placement in the B ranks yet. 
from C to C+: Rain teams occasionally employ Thundurus-Therian to function as a potent special breaker, which is a strategy more players are taking advantage of. 
from C- to C: Rain teams occasionally employ Seismitoad to function as a special sweeper and it can also be a viable Stealth Rock setter. 
from UR to C: Specs Boomburst. 
from S to A+: I personally voted for S and feel it should stay there with Urshifu in the tier, but the main argument for A+ appears to be that it is limited to specific roles due to things like Urshifu being in the tier. They force it to run less productive variants and make playing around it easier. Clefable is still one of the best Pokemon and plays a role in defining the metagame, but it is true that right now the presence of Clefable is largely a reactionary one, which is far more susceptible to countermeasures and well thought-out strategies that take advantage of it. 
from A+ to A: Slowbro is still a great pivot with Future Sight, but it is not quite seen as one of the absolute best options with stiff competition being present from Slowking, Slowking-Galar, Toxapex, and other Pokemon depending on the specific roles you wish to fulfill. 
from A to A-: Blissey is a strong specially defensive pivot, but many sets and trends exploit it. In addition, there are tons of common physical attackers that outright destroy it circulating the metagame right now.
from A to A-: Dragapult, while not actually outclassed by Spectrier due to them fulfilling vastly different roles, is seeing less usage and viability due to different team structures not catering to its niche as a hit-and-run form of speed control through status, hex, and momentum generation with U-turn. As the metagame stablizes, there is simply less need and ability to fit it onto builds currently. 
from A to A-: Kartana faces stiff competition with other strong physical attackers and it also is walled by a number of common physically defensive options. 
from B+ to B: Buzzwole's passivity vs top options like Clefable, Toxapex, Zapdos, and Tapu Fini causes great concern for users of it despite being able to wall Kartana, Urshifu, and many offensive Ground types. 
from A- to B+: Latios is stuck in an awkward spot currently as it is incapable of breaking many balance structures, often limited to getting off a Trick and some chip most games. It is not fast enough to be speed control and seldom fulfills a defined defensive role. While the lack of Pursuit benefits it greatly, that is about all Latios has going for it currently. 
from B+ to B: Blaziken has not been able to put it all together and function as a win condition yet. It is oftentimes able to pick up individual kills before being overwhelmed or outright stopped when paired with enough support, but overall fragility has left it incapable of being a top option in the metagame.
from B+ to B: Magnezone has been harder to fit on teams with less trappable Steels and more defensive limitations imposed on teambuilding. 
from B- to C: The daydream of Spectrier reviving Incineroar would be a reality if there were more reasons to use it. That is a big if though. Sadly that if has not became a reality, so Incineroar falls back into the depth of the C ranks for the time being. 
from B- to C+: Zapdos-G has simply not gained traction. It is a niche option offensively to abuse Defog and that alone is not enough. Other Fighting types provide stiff competition and it will struggle until this changes or there are more reasons to try it on teams. 
to UR Hard Disagree
to B+ Disagree (but like not that much)
to S Hard Disagree (again :p)
to B-
to S
to UR
one of the only viable spikes setters period, amazing defensive typing, really awkward to switch into due to Knock+Leech
one of the most defining defensive pokemon ever, I shouldn't have to explain this one lol
. I know it's been a little chaotic with suspects and an ever changing metagame.
