Here's the opinion that I gave to 1TP about a fortnight ago on the tier list with a few updates since I've played more Sword/Shield BSS. I will have to apologise in advance, I know how much certain people dislike "Showdown knowledge", though I have extensively watched streams and probably read more Japanese blogs than anyone on Smogon so most of what I am saying is also relevant on Cartridge.
Comments on 1TPs post
Corviknight:
I'm also of the opinion that it is clearly the 4th best pokemon in the game and 2 weeks ago I had it in S but now I have it at the top of A+.
The question is really is whether it is closer to rank 3 or rank 5. Corviknight in its current iteration reminds me a bit of Tapu Fini, in terms that it is clearly the best defensive pokemon in the game but also comes with a considerable amount of versatility. Corviknight constrains teambuilding and requires multiple specific checks in order for that team to be considered solid. Such is its strangehold on the metagame, that many pokemon in the top 10, notably the rotom-formes rankings are considerably boosted by Corviknight's existence. Even with these checks existing on your opponents team, Corviknight can still be brought to battles and fulfill its role of neutering certain top meta threats effectively. There is very little downside of putting it on your team. Rotom-H has different formes and there are other electrics/fires, there are other WP users, but there is only one pokemon that performs Corviknights role effectively, that being Corviknight.
Tapu Fini was better in USUM than Corviknight currently is in SWSH, which is why I suggest it stay A+ (though it is the best of the bunch). The reason for this is because despite its great matchup spread against the S tier, the meta has effectively warped around it with Fire/Electric special moves, especially the former, finding its way onto every special attacker specifically for this pokemon. So its matchup spread lower down the tier list is not as good. It is bulky enough to take one hit most of the time, but it is not particularly fast so it can struggle against threats that have already boosted as it switches in. Also it does not carry a huge amount of offensive threat most of the time, which I think holds it back from S where all the pokemon have both defensive utility and offensive threat.
Rhyperior:
Rhyperior is an interesting case, I can't say I've had a huge amount of experience with it. It definitely has a role as a great user of WP that can stand up with TTar and Togekiss and check these pokemon to an extent. I do question whether, even with solid rock and dynamax, that it will be able to stand up as a dynamax user given those two 4xWeaknesses and it hasn't quite got the special bulk of TTar or Togekiss. Its use as a premier togekiss check is weaning too as players are adapting by running Grass Knot which OHKOs Rhyperior (max overgrowth I think OHKOs even dynamaxed Rhyperior) and Togekiss can definitely run this move no problem. The rise of Rotom-Cut is also bad for Rhyperior. I do have some questions about the A- tier in particular as the rank difference between A- and B+ seems similarly blurred as last gen (Cloyster I could see being B+ for example). Rhyperior also has another major problem which is that outside of rooms it is slow as shit, meaning you are taking a lot of hits even if you get off WP. Your opponents team will probably have multiple pokemon that can super effectively hit Rhyperior (often 4x) so even if you are dynamaxed unless you are in rooms, you are probably not going to sweep. Rooms has its own issue in opposing mold breaker Excadrill. My gut says to keep it in B+.
Cinderace:
From my understanding through usage and reading blogs, Cinderace is generally just solid at trading which it does well against the vast majority of the metagame and comes with the added bonus of the offensive fire typing, decent speed, decent dynamaxer and all round solid. As a lead, it pretty reliably trades with a lot of the metagame threats, trading well with pretty much everything other than Gyarados from S -> A tier, which makes it a pretty decent lead in Darmanitan-less games. It also has decent versatility, being able to run other items, stuff like counter. This can put you in a solid position as the opponent is forced to dynamax in order to gain momentum, which comes with its own opportunity cost. Other than Gyarados, nothing can really set up on Cinderace which is where I think its utility comes from. Is it as good as the pokemon in B+, I think so. I wouldn't put it any higher, although usage has it somewhere like 13th atm.
Glalie:
I'd rank Glalie based on the cartridge timer rules since that is at least the format that the current BSS tier leadership prioritises over showdown. On cartridge I think Glalie is B-, since it likes dedicated lead and needs to reduce its HP in order to set up. If it had evasion boost still, it would be A+, since you could just spam sheer cold once the opponent missed once until you KOed a pokemon and then you can just sub/protect stall the timer out. But alas, it is not. Glalie B- on cart, you could put an asterisk of B/B+ on showdown I guess.
Toxtricity:
Again, a pokemon that I haven't played around with much. My gut right now is that it is still overshadowed by pokemon like Rotom and although I could see it possibly in B, at this current point I see it as a B- pokemon.
Inteleon:
I honestly think that out of all of the pokemon in B-, that Inteleon would be the worst pokemon within that tier. It definitely has a niche and does stand out solidly in the C tier. Does it necessarily mean that it shouldn't be B-, perhaps not.
Indeedee-F:
Unranked, it does nothing over Indeedee-M. I guess I am using the Moltres counterargument here, except that what Indeedee does isn't that great to begin with and right now there are only around 60 pokemon mentioned and I'd struggle to put indeedee-m there.
Moves up:
Toxapex to A-
I honestly think Toxapex is being slept on a bit in this list and is fantastic in Sword/Shield and definitely better than everything in B+ (inc. Rhyperior). It does exactly what it used to, stall out things (dynamax included), spread status and generally being an unkillable blob. Stall as a style is underrated, both in cartridge and on showdown. It should be noted that for Cart, Toxapex is easily one of the best timer stallers in SWSH.
I think it is amiss to mistake lack of versatility and passiveness for lack of viability. Scald burn is devastating to most of the tier without the ever-present misty terrain and strong electric types that generation 7 had, meaning that most pokemon other than rotom formes and togekiss hate switching into Toxapex. Baneful bunker is even better as it wastes dynamax turns and toxapex takes nothing even from super effective attacks with a protect up and can heal back the opponents Dmax turns with recover/regenerator. It is the weak electric presence (ie no thund no koko) that means rotom reigns supreme as an electric, but Rotom is actually one of the electrics that Toxapex can take multiple hits from if toxiced/burnt and KO through stalling. Yea Pex isn't a great dynamaxer, but part of its strength is that it can beat dynamaxers without needing to dynamax. It sees loads of top team usage for good reason and deserves A-.
Conkeldurr to B
Conkeldurr is really underrated and its S1 lower usage on Cartridge was in large part not due to this guys lack of viability but more due to the annoyance of getting Flame Orb. In S2, you can see it in the top 30 where it belongs. Its an excellent Dynamaxer, nothing in the entire tier likes switching into it except like Corsola and it has the bulk to eat some hits especially when dynamaxed and benefits heavily from being able to OHKO MImikyu whilst Dynamaxed. Mach punch is also amazing priority when Hydreigon, Excadrill and TTar exist as prime targets. I honestly think it could be B+, its that good but B is good for now.
Lapras to B
I think Lapras is starting to come into its own as an AV user, being a decent stallbreaker and decent dynamaxer. Im on the cusp of this nom but I think Lapras will be up here easily in S3 so might as well start the rise up.
Seismitoad to B
An underrated sweeper, the only good rain mon etc, think should at least be considered for B
Moves Down
Tyranitar to A
I think Tyranitar is an excellent weakness policy user, but has the misfortune of being slow of speed, you want to dynamax to live hits but that means that you havent gotten a speed boost so you are essentially trading your dynamax for a 1 for 1 down and momentum on the next kill a lot of the time. Togekiss its fellow WP terror is far more obnoxious. Its obviously excellent, but I think its of the same tier as Hydreigon, Gyarados and Snorlax and not there up with Togekiss as a Dynamaxer. Hating Corviknight, Excadrill, Snorlax and Mimikyu as well as WoW is not a good thing. If anything, replace it with Hydreigon which is more fitting in A+ but Im not gonna push that one.
Dracovish to B-
Vish hype unfortunately has died down, too many bulky waters, stuff like Lapras rising in usage, which is gonna be even more prevalent once GMax Lapras is released. Slower than Dragapult even when scarfed, being revenged by Mimikyu and being a shitty Dynamaxer really sucks for this mon.
Arcanine to B-
I think time has shown that Arcanine is not as good as originally thought, its like solid enough but theres not too much special about it. Rotom-H, Charizard and Cinderace have a lot more going for them so arcanine is pushed out a bit by default.
Corsola-Galar to B-
I know I gave an argument for Toxapex being decent earlier but Toxapex pivots a lot easier due to regenerator, can poison shit, is good against threats on both sides of the spectrum and is a lot easier to fit on your team. Corsola is too passive even to be used on stall a lot of the time. Corsola is no toxapex, being weak to Dragapult, Mimikyu, Hydreigon sucks.
Other comments:
I could potentially see Dracozolt as B+ too, but I'm alright with it as B for now.