Didn't find Pikachu I put it on B-
S
Magneton -> for me the best mon in the tier. Insane bulk and nice offenses (both for specs sturdy and eviolite analytic) + momentum. Almost every team needs an hard check/counter (or another magneton). Still 4x weakness saves it from brokenness
A+
Houndoom -> versatile attacker with good matchup against sun and quite a lot of other things
Skuntank -> toxic spikes on such a solid mon is crazy good. Super splashable
Quaxwell -> single-handedly allowed SV PU to become random focus sash: the tier. Not S because it's kinda passive and magneton walks over it.
Perrseker -> priority, rocks and u-turn with good attack make it the #2best steel in PU. (And a prime member of the random focus sash club)
Haunter -> fast hard hitter with 3 immunities. Our miniature pre-nerf Gengar. (And another prime member of the random focus sash club)
A
Dugtrio -> effective lead/revenge killer/late game sweeper that shapes the metagame with its insane speed coupled with a rare typing (ground) and move (stealth rock). Quaxwell is an hard counter but a good teammate too (yes, he's a sash user)
Gabite -> a bulkier ground type stealth rocker. Dragon tail and the ability to check most magnetons is what makes it A
Lycanrock -> Another mon on the list of extremely effective sashers. But it's also a good scarfer. Theoretically grants 100% accurate stone edges but still I fear it misses everytime
Squaqwabilly (I don't care if spelled wrong) -> hits so hard it's ridicolous, while having stab priority + u-turn
Vivillion -> Guess what? A sasher. This time it sweeps your team and makes at least one of your mons fall asleep. It's really frail and that's the only thing that makes it (somewhat) manageable. Giving only A because it has some degree of 4MSS but I can see the point of A+ or even a ban.
Crabominable -> bulky (expecially with AV) wallbreaker . Shines with tera but doesn't need it. Drain punch recovery makes it annoying to face. Can sweep teams with TR up.
A-
Camerupt -> hard counters magneton (except tera water) and blanket checks a large portion of the meta, while setting up rocks. And on TR it's a menace.
Hattrem -> enables trick room to be a viable playstile if it wants too. If it doesn't it's still got one of the best abilities in the game paired with insane bulk
Leafeon -> tera fire tera blast under sun is S+ (if you run sun without it you're running it wrong) but you need to dedicate your tera and run sun, greatly limiting your options. Without tera blast it's better as a defensive mon.
Liligant -> Comparable to vivillion, but has arguably worse movepool and ability. Compensates with a better typing and bulk. Needs tera most of the times.
Gogoat -> solid defensive mon / bulky attacker. Sap sipper is ridicously good paired with tera.
Falinks -> First impression and no retreat are 2 very viable sets, expecially with the scarcity of good fighting types.
Pyroar -> Frail, fast attacker, faces competition with houndoom but differentiates itself with extra speed and slightly better bulk.
Rotom -F -> best rotom. Bolt beam is awesome. Sadly one of the super-rare bolt beam resists is also the best mon in the tier and a direct competitor.
Tinkatuff -> bulky annoyer that can set up stealth rock. Most people put it higher but despite its plethora of tools to cripple the opponent its offenses are really bad and it doesn't have viable recovery. Still an extra-solid choice
B+
Flareon -> has 2 good abilities. One day I swear I'll run it with tera normal fire orb because it really dies fast with toxic orb + flare blitz. Flash fire is arguably better
Fraxure -> good typing, quite solid bulk, first impression and DD. Arguably best dragon dancer
Raichu -> hard magneton check, with very good speed and offenses. Super frail but guess what? focus sash
Mismagius -> if you really want your opponent not to spin away your rocks that's the way to go
Murkrow -> best manual weather setter in the tier. Brave bird hits decently hard (even uninvested) and it's got other good moves like u-turn, haze, taunt. Sadly heat (or damp) rock means no eviolite
Persian -> unleashes powerful fake outs against the plethora of sashers and frail mons in the tier, while outspeeding most of them. It can set weather too.
Sawsbuck -> serene grace is an annoying ability
Scovillian -> best non-tera sun sweeper. It's really frail and needs a growth boost to sweep teams for real. Can't do anything outside sun.
Raboot -> best protean clone user. It his surprisingly hard while being surprisingly bulky (with eviolite) and fast.
Ampharos -> a special wall (with phasing capabilities) that can hit hard too and even threaten a sweep with agility.
Wugtrio -> Triple dive hits hard (laughing on sashes), and it's fast. It's also super frail.
Rotom-F -> worse than S, but it has a better defensive typing even with levitate meme.
B
dedenne -> fast annoyer that can paralyze and pivot. Both the best grounds in the tier are 2HKOed on the switch. Camerupt has a way better matchup
golduck -> best rain sweeper, decent scarfer, and kinda good anti-sun mon with cloud nine.
glaceon -> hits hard while providing some degree of defensive utility
rabsca -> expecially good on TR , can work on other playstyles. It hits really, really hard.
Flapple -> you fear it while you face it. You fear it more while you use it.
glimmet -> insane ability but there are mons setting tspikes while actually being good (Skuntank).
dragonair -> our dragonite
kricketune -> webs mean you have to run it. There's no alternative.
indedeedee-F -> crazy that his brother might get to OU. Here she doesn't enable dangerous sweepers but can still get some work done on its own
frogadier -> spikes differentiate it from raboot
banette -> it's got a random sash, I know it, you know it. Destiny bond is super annoying.
carkol -> if you really want a spinner that doesn't invite magneton in (and has rocks too)
grumpig -> insane bulk paired with thick fat and good support movepool. Good weather setter.
B-
cacturne -> spiker with priority. Of course it's got a sash.
beartic -> good rain sweeper, best (and only) hail sweeper
greedient -> its bulk is ridicoulous and it's got a wonderful ability. I'm okay in putting it higher but I find it quite passive
drakloak -> i didn't see that much from it, but I can be convinced it's stronger.
mareanie -> another good tspikes option
dunsparce -> bulk and more bulk (+ recovery)
hippopotas -> sand can break sturdy and sashes. But most sashers and sturdy mons don't care. And there are no sand abusers because someone in the OU council decided to ban houndstone and not last respects. (still, it's likely NU would have taken it anyways).
pinchurichin -> good tspikes option, sadly its terrain isn't that useful. EDIT: On the other hand, its other ability hard counters magneton in the hardest way possible. It can be B/B-
seviper -> I've seen some of them in the (middle to high) ladder. It's not completely clear to me why to use it instead of skuntank. Glare?
sneasel -> I've seen very few of them. I feel it could be higher than this, possibly even A/A-, but I haven't got enough proof about it and it's not a key part of the current meta (at least on the ladder).
zweilous -> kind of outclassed by flapple, it differentiates itself enough
luxray -> It can hit quite hard and now has trailblaze I think
vigoroth -> Can threaten a sweep with bulk up and it's got the stats to back it up. Suffers 4MSS.
Pikachu -> hard hitting fake out + very good offenses, but it's extremely frail and not that fast.
C
shroodle -> nice anti sweep button but it's very frail. Arguably a noob trap
sligoo -> it should have some niche
toedscool -> lots of good moves but they go last
snover -> you have to run it for hail. Or just run rain if you like beartic
bramblin -> does it spin? I don't remember
mudbray -> I guess it should have isurprising physical bulk
girafarig -> didn't see it enough to rank it better than C. Psychic competition is real but it's got nice bulk, decent offenses and NP/agility, so I guess it's ok if you put it higher
dartrix -> defog. No other reason to use it
morgrem -> enables dual screens as a playstyle, but I didn't see it at all. Is light clay banned?
fletchinder -> appreciates hazard removal being easy in the tier
pawniard -> didn't see it on the ladder. It could be better than C but I dunno
bronzor -> bulky rocks setter, it's quite passive
stonejourner -> I had some fun with weakness policy, but ... you've got Stone edge that doesn't miss + more speed in lycanrock. But I'm open to ranking it higher, its physical bulk is amazing.
sudowoodo -> can be a decent lead. Sets rocks and threatens quaxwell on the switch with wood hammer
swalot -> good bulk, stockpile, but what does it actually do?
tropius -> anyone who plays randbats know this mon can be a pain to face if you can't OHKO it.
wigglituff -> decent rock setter choice. Sadly a set of rocks + wish + protect + dazzling gleam is super passive (and I'm not sure it's legal).
No explanation for URs, except for
eiscue: I could put it in C but it's a noob trap
slaking: same as above
zorua: same as above
delibird: same as above
slowpoke: I could see it have some niche but saw none on the ladder
oinkologne: greedient arguably outclasses it as a stuff cheecker. But it's faster and can run salac, so maybe there could be some niche
donald trump: to frail
glalie: wait for moody unban. Then realize it's outclassed by scovillian.
NFEs and LC mons lmissing from the tier list look all like UR to me except for pikachu. Maybe krokorock could have a niche (B-/C) too. I've seen people using it and intimidate is good, but it faces severe competition from gabite and dugtrio. EDIT: meditite too should be rankable