S -> A+ No longer as dominant as once was. Trends like Roselia, Duosion Clefairy and Corsola-Galar are everywhere and no Knock Off makes it very hard to break them without prior support. It also can struggle against Piloswine and Ferroseed as its coverage can either be inaccurate or still not be sufficient to KO foes. It still sees innovation through Seismic Toss, Thief, and RestTalk sets and remains an elite Pokemon, but overall it struggles more against meta trends than it did before, and the drop reflects it.
A+ -> A Clefairy gets a slight drop, with the main reasons being its passivity making in vulnerable to walls to attackers like Piloswine and Fraxure. While Magic Guard and an amazing movepool still make it a strong defensive consideration, as the meta developed, other walls like Galarian Corsola and Duosion have started competing for the same roles it does. While they lack Clefairy's versatility, their higher overall stats make it easier to fit on teams, and other lures like Heavy Slam Machoke and Flame Orb Gurdurr have also made its job as a wall harder. Still, Clefairy remains a very strong pick and a rock-solid choice to complete balanced and bulkier structures.
A+ -> A- Still remains one of the tier's important walls, though it faces notable competition for Hattrem as a defensive Psychic-type and Clefairy as a Magic Guard user. Regenerator sets remain great at walling threats like Electabuzz Rose and Wartortle, and Magic Guard sets remain potent if no Dark-types are there. Inherent flaws of lacking bulk if not invested, being very weak to item disruption, and deciding which ability it wants to take on are definite flaws, but it remains a very solid pick overall.
A+ -> A While Tangela still has massive physical bulk, Knock Off, and Regenerator, it's overall now a big step down from lacking Roselia's versatility (namely Spikes) and helpful Poison typing. With Vullaby and Roselia being commonplace, landing Sleep Powder becomes a much taller task and causes it to be luck-dependent to land crucial Sludge Bomb poisons, and the need to be bulkier overall (not just physically) is something Tangela also lacks over Roselia. Still a very solid candidate for a team that needs its physically defensive capabilities.
A -> B+ Has faced a significant drop from its usage in previous metas. While Bulletproof makes it one of the hardest checks to Roselia in the game, competition from Gurdurr and Machoke have made it hard for Hakamo-O, owing to its lack of Knock Off and its Dragon typing being a double-edged sword. Vullaby running Brave Bird and Electabuzz commonly running Psychic, combined with trends like Clefairy, Duosion, and Corsola-G being commonplace, and Hakamo-O demands much more support to excel on teams than before. The dragon typing is helpful for Thwackey and Tangela, but it makes the Piloswine matchup worse and complicates its matchups to Fraxure and Gabite. While still tricky to guess on preview on account of its offensive and defensive sets still being solid, it's fallen from grace and their effectiveness is nowhere near as good as in previous metas.
A- -> B Ferroseed has immense trouble getting Spikes up against Hattrem even with Knock Off, and either Gyro Ball's limited PP or Iron Head's lack of power combined with its lack of Toxic makes it difficult to wear down walls in general. In addition, Ferroseed's reliance on Leech Seed for recovery combined with serious competition for the wall slot by Roselia, Tangela, and Koffing causes it to be much harder to slot on teams than before.
A- -> B+ Without Swords Dance, Gabite's lack of power is on full display. Its reliance on Toxic to damage foes leaves it hapless against foes like Clefairy, Hattrem, and Koffing, walls that remain ever-present in most NFE teams. Competition with other Dragons and PIloswine doesn't help it either.
A- -> B+ Linoone-Galar doesn't appreciate bans like Golbat and Magmar going away, and while Duosion is still a strong Pokemon and can threaten Roselia, its Speed tier is now a lot less of an important factor and often lacks sufficient power in a bulkier metagame.
A- -> B Marshtomp is still a consistent Electabuzz check, but the departure of Magmar and Pikachu takes away a lot of duties. It gets worn down really quickly from Raboot, hates getting statused, faces immense competition from Wartortle over its lack of Flip Turn and Shell Smash, and overall its passivity and often lacking damage output is a lot more glaring in a bulkier meta now.
B -> B- Gastly still has a lot of reward if it lands the right matchup, checking Roselia and possessing nice versatility in Choice sets or Knock Off utility, sporting positive matchups against Roselia and non-Knock Off Clefairy. However, the risk in its immense frailty makes it difficult to slot on teams without significant support.
B -> B- Ivysaur's access to Knock Off gives it an interesting role as a midground to Tangela and Roselia, but lacking Tangela's massive physical bulk or Roselia's versatility makes Ivysaur difficult to apply in practice. Sun teams are increasingly rare in the SS metagame, owing to a lack of good Chlorophyll and sun abusers, though its access to Weather Ball and Poison STAB gives it enough distinguishing features.
B -> B- Zweilous's Hustle-boosted attacks can still disrupt team structures over its potential power, but its double-edged typing makes it very weak to common U-turn users and completely hapless against Clefairy. While a defensive set was used to check Magmar and can still be nice for Duosion, Hattrem, and Vullaby, the niche has narrowed since then and needs more support than before to do so.
B- -> C+ Abra's non-existent bulk combined with competition with other fast special attackers like Electabuzz and Choice Scarf Lampent makes this increasingly difficult to fit on teams outside of being the team's emergency stopper to out-of-control revenge killers. Being very easy to identify on team preview what it does doesn't help matters either.
B- -> C+ Wartortle's existence as a pivot combined with numerous other pivots makes Chinchou hard to justify to slot on teams. While it is still good at checking Electabuzz and Wartortle, its immense passivity makes it difficult to justify over other slots.
B- -> C+ The Psychic subtyping firmly hurts Metang rather than helps. A weakness to Knock Off, a U-turn neutrality, and being overreliant on Toxic for damage output makes it difficult to justify on teams without building the team around it.
C+ -> C While Dwebble faces competition as a Stealth Rock lead from Krokorok, it's moreso that dedicated Stealth Rock setters have a difficult time in NFE due to how other setters like Piloswine, Galarian Corsola, and Clefairy don't need to rely on being in the lead slot to excel. Even so, Krokorok has an easier time leading thanks to having a helpful STAB Knock Off and Taunt to more easily deter hazard removers.
C+ -> C Gothorita's niche as being the sole Defog deterrent is challenged by its low Speed and mediocre special attack; it relies a lot on getting the Nasty Plot boost and likely also having Thunder Wave/Sticky Web support to truly start threatening teams. Its coverage for Roselia, Galarian Corsola, and Vullaby is still appreciated, however.
C+ -> C Togetic's Fairy typing and good special bulk might make it look like a great Defogger and cleric, but it's significantly hindered by its low Speed, Flying subtyping, and lack of a useful ability. Nasty Plot sets can still be notable against Vullaby, though the need for paralysis and Knock Off help to start being effective makes this difficult to build around. Competition from Morgrem, an already niche pick, also doesn't help.
C+ -> C Raboot makes Torracat's life hard. While its stats might seem good on paper, its shallow offensive coverage makes this much harder to fit on teams than one would expect, and easily walled by Water-types and most defensive behemoths.
C -> C- Similar reasoning to Dwebble, though the typing and lack of Sturdy makes it comparatively harder to fit on HO structures.
SWSH NFE 
ORAS NFE 
Trubbish
Pupitar
Frillish
Meditite
Surskit
Herdier
Porygon
Elekid
Houndour
Drowzee
Graveler
Snubbull
Wooper
Doduo
Dratini
Meowth
Pidgeotto
Ponyta
