I made 4 Boxes to analyze each Pokemon and here are all the Pokepastes. Made this before the Tier List thing came up.
https://pokepast.es/ec3365b4b7b4eb41
https://pokepast.es/21cfca3883139b46
https://pokepast.es/ceac9da2fc16cbb0
https://pokepast.es/5f3e3ee105e8640d
Tier: OU
Explanation: I think people are really sleeping on this thing because of its typing. Its actually pretty comparable to Marowak-Alola is power due to Head Smash's giant BP, which surpasses Shadow Bone.
252+ Atk Thick Club Marowak-Alola Shadow Bone vs. 0 HP / 0 Def Armarouge: 440-518 (141.4 - 166.5%) -- guaranteed OHKO
252+ Atk Arcanine-Hisui Head Smash vs. 0 HP / 0 Def Armarouge: 492-582 (158.1 - 187.1%) -- guaranteed OHKO
Factor in the fact that Arcanine isn't restricted to holding a specific item to be useful, is way faster, and has 2nd Strongest Extreme Speed outside of Ubers, which with Tera Normal bypasses the major weaknesses of Arcanine-H, makes it a strong contender for OU
Tier: Ubers, Legend Plate AG
Explanation: Regular Arceus is a no brainer for Ubers, and most of the cover mascots tier Pokemon will be glossed over because, well duh. Arceus is special because from PLA you have the new Legend Plate Arceus. This plate essentially ensures Arceus/Judgement has a type advantage against the thing in front of it, which frankly is the most absurdly broken thing in all of Pokemon. 1 move, and Arceus has perfect coverage. It can just use Judgement and focus on other utility moves in your moveset, and now you're nearly impossible to deal with unless you're incredibly bulky specially (which eventually is beaten out by calm mind) or manipulate its typing so a revenge killer like Koraidon can KO it.
Tier: Untiered
Explanation: No surprises here. Articuno is a shitmon. Even with Tera solving its bad typing, there isn't much reason to use it.
Tier: PUBL/NU
Explanation: Better than original Articuno, but not so much as to make massive waves in higher tiers. It's better regularly and better abuses Tera as Tera Blast gives it a way to beat Steel types that isn't Stored Power after 20 turns of set up.
Tier: RU/RUBL
Explanation: Normally this version of Avalugg would be worse, but in Gen 9 only, I'd say its better. And yeah, it's Tera. It trades in some Special bulk to be faster and hit harder. Its much better offensively and also packs pretty much everything regular Avalugg has and wants like Stealth Rock.
Tier: UU
Explanation: Azelf seems like the most buffed of the Lake Trio, but only because Mystic Favors it the most. Its also a decent hazard setter, but outclassed by Mew in that regard. It also can give itself STABs with Tera, block rapid spin, or let it survive in a pinch with a type change.
Tier: RU, Last Respects Ubers (don't listen to the OU Room on Showdown saying Basculegion will be the one banned and not LR. It would be embarrassing for Smogon to do that)
Explanation: Without Last Respects, Male Basculegion is really outclassed honestly. Its comparable to Crawdaunt, except that it has a much worse movepool. Your options for physical ghost STAB are LR, Phantom Force, and Tera Blast Ghost. That's pretty detrimental for Basculegion's viability as now it has to Tera for good secondary STAB outside of Ubers. Between those options you have Psychic Fang, Head Smash with recoil, Crunch, Ice Fang, and Double-Edge. Pretty poor choice outside of spamming Wave Crashes. Also no Sword Dance or Dragon Dance too. Still RU because Crawdaunt isn't in the game and would likely be UU or even OU if it was.
Tier: UU
Explanation: Much better movepool than its male counterpart. Female version at least has usable Ghost moves to use besides the banworthy move. It has less type coverage, but Ice Beam is always great and is more impressive given Basculegion's type.
Tier: UUBL
Explanation: This thing is the strongest Tinted Lens user in the game, both in fire power and BST (at least legal currently). And unlike other Tinted Lens users, this thing also has Sheer Force (effectively stronger than Lando-I with Hurricane btw). Its actually insane that you can choose between being not walled by type resistances or not walled by pure bulk. Additionally Esper Wing for Tinted Lens is incredibly good, having the best of both good STAB and Trailblaze speed boosts. You then have Calm Mind and Agility to let it sweep pretty easily.
Problem. It's slow and frail and relies heavily on free turns to get going and even after +1 is still outsped by Meowscarada naturally, among many many potential scarfers. It is however better in UU and probably too good.
Tier: Ubers
Explanation: duh
Tier: AG
Explanation: Being one of the best Pokemon in Ubers last Gen, no thanks to Arceus-Dark's absence, Calyrex-S's main flaw was Dark types of course. No doubt that with there only being Arceus-Dark and some lesser dark types, and more importantly getting Fighting coverage while resisting Sucker Punch, Calyrex-S will join the AG club. Honestly still not as broken as Legend Plate Arcues imo.
Tier: Untiered/PU
You set up Stealth Rock and Spikes with a build in Focus Sash and that's about it. PU even has 2 Spikes/Rock setters already, and even Sudowoodo does too, which is untiered, but Carbink is better than Sudowoodo at that, which isn't saying much,
Tier: UU
Explanation: Chesnaught was UU last time it was usable and it only got more buffs to keep up with UU Powercreep. Not only as utility, but with set up as well thanks to Body Press for Bulk Up, and Trailblaze for both Belly Drum, Sword Dance, and Bulk Up.
Tier: RUBL
Explanation: Cresselia will find a niche in every tier, like most Pokemon do, but will most likely end up in RUBL. It has cool new toy in Less PP Jungle Healing, which helps Calm Mind sets, along with Tera, but otherwise is not that impressive. Its still very weak without several boosts, and while bulky can be worn down before it does damage. Otherwise it's basic support Pokemon for HO teams that can bring a Pokemon back in the game with Lunar Dance.
Tier: RUBL
Explanation: I think overall Decidueye is outclassed by Chesnaught a little as a Grass/Fighting type. It has its own good qualities, like Triple Arrow being a great Fighting move, Scrappy, and has Defog + Knock Off, but Chesnaught is also way bulkier and has more options. UU is also not lacking in hazard removal options too, even regular Decidueye having Defog too.
Tier: RU
Explanation: Delphox has improved since Gen 7, but likely won't be UU due to Armarouge being there too and is mostly better. Can't go wrong with Arm Cannon, Expanding Force, and Weak Armor. Only time you'll see it in OU is on a Youtuber's "DELPHOX DESTROYS OU" video where they use Copycat Shell Smash strategy with Eject Pack Torkoal, but using Magician, and even then you could use Meowscarade for that too.
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Tier: Ubers
Explanation: duh
Tier: RU
Explanation: Diancie was NU last Gen and now it can shed its awful typing while being offensively threatening too. Definitely RU.
Tier: PU
Explanation: Probably the best of the "Ugtrio trio" outside of Arena Trap, thanks to Steel typing giving it tons of resistances to tank as hit in PU. It now has Sword Dance too, but that probably won't bring it to NU tier since regular Dugtrio has it too.
Tier: NU
Explanation: Grass compliments Electrode extremely well offensively thanks to hitting the ground types that wall it, but unfortunately has 80 SpA as its highest offensive. You're also still walled by Grass and Dragon types, which isn't too bad since you have Leech Seed, Volt Switch, and Tera too. Definitely a lot better than regular Electrode.
Tier: Ubers
Explanation: I don't know why people have any doubts about Enamorus staying in OU. Serperior was a super star in OU solely because of Contrary and that thing would be an NU/PU shitmon otherwise. Enamorus-I regularly would be around UU and OU powerlevels, and it gets Contrary + Superpower. If Revenge killing was an issue for it, then you can just simply run Tailwind, which you then need to plan around as it whales on you with increasingly strong Superpowers. You don't even have to use Contrary either. You can use regular set up which you'll need to account for as well. It's simply way to strong with an S tier ability.
Tier: UUBL
Explanation: It's the weaker of the 2 Enamorus forms, but still is pretty solid. It trades off most of its speed for much better bulk, and bulk it uses well thanks to being Fairy/Flying type. Its a great answer to Great Tusk and tons of other top tiers. It has excellent special options as well to be pretty threatening. Sadly it's so slow that even Kingambit outspeeds it (you know, one of the best offensive Steels in the game), and lacks recovery.
Tier: Ubers
Explanation: duh
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Tier: Uber
Explanation: duh
Tier: NU
Explanation: Glastrier is greatly improved thanks to Tera and new Trailblaze, which it can realistically spam with its bulk combined with Tera type, but that doesn't make it that much better. +1 only outspeeds base 69 (nice), and +2 you speed tier Walking Wake. But by that time you'd be dead or heavily chipped to be killed by strong priority. Like Cetitan is RU and that thing has basically the same bulk, but also Belly Drum, Slush Rush, Earthquake, Sheer Force, and you already outspeed +1 Glastrier as well.
Tier: RU
Explanation: Hoodra has a much better typing than its Kalos counterpart and better bulk, but that's just about it. Honestly I don't see why many people are rating this thing so highly as to say its OU material, when there are better special walls with good recovery and who are just about as threatening too.
Tier: Ubers
Explanation: duh
Tier: OU
Explanation: Do I need to explain this one too? Heatran is an OU staple and greatly benefits from Tera as well.
Tier: UU
Explanation: I think people underrate Hoopa-C this gen despite being massively buffed both directly and indirectly. A lack of pursuit is fantastic for Hoopa as now it's no longer food for the average Dark type. And you know how Calyrex-S will be AG thanks to Tera? Well Hoopa benefits a lot from Tera too. It can now Tera Fighting to give its Focus Blast STAB while also being able to tank Dark type attacks very easily, and special Ghost attacks too. Or you can Tera to something else like Electric to resist Bullet Punch, Dark to resist both Sucker Punch and Shadow Sneak, Ghost to amp up your Ghost STAB to absurd levels, Fairy for utility sets or if you want Tera Fairy STAB, ect. You really can't go wrong.
Tier: Ubers
Explanation: Well now, Hoopa-Unbound is a whole new story. Being Hoopa-Confined but most part better. You have better Speed, SpA, and Slaking tier Atk. Previously the drawback of Hoopa-Unbound was that its typing sucked shit. Having 0 resistances and a nasty weakness to Bug too. Additionally it was still Pursuit weak due to its frailer physical side + the drop you get from Hyperspace Fury. However, Tera allows Hoopa-U to actually resist things, which is frankly massive. In addition, it can be far more customizable with Tera now that its working with both Special and Physicals moves. You couldn't wall this thing before and need to beat it with offensive pressure, now while still physically frail, you are able to actually tank hits. Even physical threats like Great Tusk go from easily OHKOing it most of the time to not having a guaranteed 2HKO on Hoopa-U.
252 Atk Great Tusk Close Combat vs. 0 HP / 4 Def Tera Flying Hoopa-Unbound: 148-174 (49.1 - 57.8%) -- 97.7% chance to 2HKO (it's 97.7% but it's also Great Tusk vs fucking Hoopa too). Like I showed earlier, you can even nearly OHKO Great Tusk with a fucking Dark Pulse after Tera Dark. You think Kingambit's dark spam is bad? Hoopa is a KOing machine even with just Scarf. It can spam you with Knock Off, Hyperspace Fury, and Dark Pulse, while removing resists with Psychic, Fighting, and Poison coverage. It may not have Sucker Punch, but it does have better Speed that's enough to make it faster than Dragapult after a Choice Scarf and more than enough speed to crush bulkier teams.
Tier: OU
Explanation: Kleavor is the alternate evolution of Scyther introduced in PLA and shares a similar stat distribution to Scizor. It gains more Speed and Atk from some bulk and not used SpA. Additionally it gets much improved Sharpness ability that is generally an upgrade from Technician, trades in Steel for Rock making it have a better offensive STAB at the cost of lots of resistances, and most importantly has Stone Axe. Attacking version of Stealth Rock. Stone Axe will make Kleavor OU be default as its a great hazard setting tool. It pressures majority of things that want to remove hazards because they have to decide to either attack you or to Defog/Rapid Spin. However, there is another better hazard setter with a similar move we'll talk about later, and additionally the best Hazard remover in the tier has extremely Trolly speed tier, being Great Tusk at 87. That 87 Tier is gonna troll a lot more Pokemon than you think. Great Tusk is also a Great Wall for Kleavor who doesn't have any real options to beat it besides Aerial Ace. Without Tera Flying or Bug, Great Tusk cleanly 2HKOs you too.
But still, Attacking Stealth Rock is no joke.
Tier: Uber
Explanation: duh
Tier: Uber
Explanation: Despite the movepool nerfs, its still definitely Ubers. The movepool nerfs fair it better than its Lion counterpart.
Tier: OU
Explanation: Despite the movepool nerfs, competition with Great Tusk, and the harsher landscape, Landorus-T is still one of the bests of all time. You can never go wrong with a Fighting, Ground, and Electric resist for any team, and combo of Earthquake, U-turn, Stealth Rock, and some 4th move is going to always be good for Landorus-T. It's just that the 4th move isn't Toxic, Knock Off, HP Ice, or Defog. It has plenty of options still, including psuedo Hidden Power in Tera Blast, which works off its stronger Atk stat too (though ironically less ideal for Lando wars). You still have fantastic options like Taunt, Smack Down, Grass Knot, and maybe some other out of the box option. Additionally, its offensive sets are only better since it now gets Physical Flying STAB that isn't Fly with Tera Blast Flying. Giving it that coveted Ground/Flying coverage only walled by specific Pokemon.
Tier: UUBL
Explanation: Lilligant-H has the new move Victory Dance, which is a physical version of Quiver Dance, which also means Lilligant-H semi-protects itself from priority, which is huge. But that's about it. It's also arguably the best user of Solar Blade and a fast Sleep Powder. But that's just about it. Hustle makes its physical moves Strong, but completely unreliable and with no way to boost accuracy without Wide Lens, which just makes them 88% accurate for moves that should be 100% accurate. Without Hustle, it doesn't do as much damage as it should for how frail it is. It can hit Flying types with Ice Spinner, but gets easily walled by Poison types not named Toxapex or Clodsire. Your competition is also Breloom, Volcarona, and Dragonite. One having Spore and priority, one having great fire power even before a boost, and one that has great fire power + priority + is incredibly bulky. However definitely too strong for UU, so in UUBL hell it goes.
Tier: Ubers
Explanation: Get this thing out of my face. It was already broken in Gen 8 after getting Stored Power. Now it still has SP and has Tera Blast too.
Tier: RUBL
Explanation: Honestly I just put it in RUBL because it was in RU in previous gens and now has Tera for defensive and offensive purposes.
Tier: PU
Explanation: Only reason why its not Untiered is because its new signature move and being really good with Tera (in PU context).
Tier: OU
Explanation: Even though Mew's only recovery now it Life Dew and drain moves, I still think it'll do extremely well in OU. You know how everyone wanted Mega Mew with Protean? Well it can sort of do that with Tera. It has a massive offensive and utility movepool. I mean really, people think Lilligant-H is OU material because of Victory Dance despite its massive flaws, while Mew still has Dragon Dance while having all the coverage and only 5 less Atk (yeah it gets Hustle, but Hustle sucks tbh). Oh and better defensive type. You also have hazard setting Mew, which has the benefit of being a great answer to Great Tusk as its faster and has STAB Psychic.
Tier: Uber
Explanation: duh
Tier: UU
Explanation: Was UU last gen and I don't see a reason why it would be UU again this Gen. Not like Heavy Duty Boots isn't in the game.
Tier: UU/UUBL
Explanation: Like before, Moltres-G was UU last Gen and eventually banned. And nothing changed, besides Tinkaton existing, which may cause Moltres-G to use Tera Blast Ground/Fire, and that's about it.
Tier: UU/OU
Explanation: Muk-A is a great special wall, staving off many special attackers thanks to only being weak to Ground, being very bulky, and hitting back decently. I can't decide if it should be OU or UU tbh. There are lots of factors to consider, especially now that it has Tera to work with. Also last we saw it was in Gen 7 where unknockable items were common and Knock Off was everywhere. So it can definitely get bigger role in OU.
Tier: UU
Explanation: Poison/Dark is a great typing, but honestly better suited for specially bulky Pokemon. Overqwil has many things over Muk-A like T/Spikes, Barb Barrage, and Intimidate/Swift Swim, but lacks things like Knock Off, which alone is huge. Biggest thing is the Gholdego match-up, which Overqwil is less fortunate than Muk in, as well as Iron Valiant, Kingambit, Dragapult, and Hatterene. It's also another example of Great Tusk's trolly speed tier as Overqwil is just slower than Great Tusk. So it has too many issue in OU to be more than niche, but would be great in UU.
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Tier: Ubers
Explanation: duh
Tier: Untiered
Explanation: It was Untiered last gen and all it got was Tera Blast Fighting, but even in PU you wouldn't want to use your Tera on this thing lets be honest, even if you get perfect coverage.
Tier: PUBL
Explanation: Was there last Gen and Home doesn't have Tapu Koko, so it's not Raichu's time to shine yet.
Tier: Ubers
Explanation: duh
Tier: RU/RUBL
Explanation: It was RU last gen, but with some good and bad changes. Firstly is Tera Blast is great for it. It can properly fight Fairy types with Tera Poison. It also now has Earthquake, Earth power, and Tera Blast Fire for Steels that also hit Fairy neutrally. However, Regidrago did lose a great tool in Scale Shot, which would be a great option this gen with Loaded Dice.
Tier: Ubers
Explanation: You know, apologies to Regieleki before. I thought Tera [coverage for ground] wouldn't be that strong, but I was wrong as evident by it being banned in National Dex. Yes, the metagame if NatDex is different from SV OU, but that difference is that it keeps the powercreep from previous gens. So if super OU can't handle it with Tera, I doubt regular OU can.
Tier: UUBL/OU
Explanation: Honestly have no clue why some people think Rillaboom is suddenly bad now. Like hello, Grassy Surge? Yeah it doesn't have Grassy Glide for the time being, and it was nerfed, Rillaboom is still a great team support with U-turn and Knock Off. Honesly it would still be better than Tapu Bulu even without Grassy Glide solely because of U-turn and Knock Off being the best moves in the game. Only other thing is that Rillaboom is trolled by Great Tusk's 87 Speed, but not as much because its a Grass type and has good enough bulk. Also Earthquake variants of Great Tusk suffer because of Grassy Terrain.
Tier: OU
Explanation: Remember what I was talking about in the Kleavor section, about a better hazard setting move? Well Shadow the Hedgehog, I mean Samurott-H is what I was referring to. What makes it better as a hazard setter is a few things.
1. Spikes are stackable while Stealth Rock isn't. So spamming it does more for you than Stone Axe, which makes Choice items a bit better.
2. Samurott-H is a Water type with good Special attack, letting it threaten Great Tusk on the switch in, even if it's trolled by that 87 Spe
3. That same mixed potential also gives it an advantage to so many other Pokemon in the micro hazards meta like Glimmora not setting T-spikes, or being able to pick off things with Aqua Jet/Sucker Punch while Kleavor only has Quick Attack.
4. You also have STAB Knock Off as an option, which also beats Mew's Red Card anticks.
5. It resists that STABs of Gholdango and can actually threaten it back too. It can even do this with a - SpD nature so long as its not something like Specs
6. Dark means its immune to Prankster
7. You also have potential for Encore and Taunt
While Kleavor may be better offensively, its not like Kleavor isn't is gonna be a superstar offensively either. I think both will be good, with Kleavor having Stone Axe as a bonus for being more general, while Samurott-H is better hazard setting specialist.
Also note that Otters actually eat Alligators. Just thought you should know.
Tier: RUBL
Explanation: Like with Regidrago, Slowbro-G was buffed thanks to Tera which helps it both offensively and defensively, but also lost Scald. While it has to use Surf now for special sets, it is now is marginally better at running physical sets now at least. Not enough to make it UU probably.
Tier: OU
Explanation: So previously, Slowking and Slowbro were the ones with the pivoting move while Galar forms were left in the dust. Slowking-G still was great in its own right, but was a shame it couldn't pivot around. But now, it has Chilly Reception, which far outweighs it losing Scald. Also I'm surprised to see that Slowking-G NOW gets Toxic and Toxic Spikes. I thought it did previously, but now it has them, which is even better now with how rare Toxic is.
Tier: Ubers (why is anyone even saying it's not ban worthy?)
Explanation: Sneedler is possibly one of the most broken non-legendaries we've seen and very easily could make history for Smogon. Dire Claw is absurdly broken, having a 1/6 chance to put anything to sleep, which is even stupid for Uber Standards. Not only is it a 1/6 chance to be put to sleep, but 1/6 chance to be paralyzed, and about 42% chance to being Poisoned if you're running Poison Touch. But it's all "cool" that you need a Steel type or Status immune thing for every team to switch-in WRONG Sneedler is a Fighting type who dunks on majority of Steels, dunks on Garganacl that isn't Tera Ghost or Poison, dunks on your Shield Dust Frosmoth you brought even though its shit. Close Combat fucks up pretty much everything that can switch into Dire Claw besides Gholdango and Venomoth. In 2 moves, Sneedler dominates all but 2 and 1/9th Pokemon. Of course there are plenty of things that can outspeed it, but that's assuming you sacked something to revenge kill it or you got lucky and you weren't paralyzed or put to sleep, so right now only 2 and 1/9th actual switch ins. Now you have your choice of coverage to beat the few answers against it. While the options are weak, keep in mind it's for a few select Pokemon, and that would be Night Slash really. You hit everything neutrally and can now hit Gholdango at all, though be warned that Defensive Gholdango requires Tera Dark to even 2HKO Defensive Gholdango, and Garg is a 3HKO for most sets though Sneedler will still win against non-Body Press sets and especially with Sword Dance, which also lets you OHKO Defensive Gholdango. Optionally, you also have access to Poison Touch U-turns too. So if you really wanted to have 0 morals, you can U-turn out while having a 30% chance to Poison the Pokemon coming in. Only Grafaiai has that combo of U-turn + Poison Touch (and ironically Unburden too) as well, and you just never saw it because Prankster is usually better.
And you know, I haven't even talked about Unburden either and its already incredibly broken. Once it gets its Unburden boost, from Rillaboom providing Grassy Terrain or something, the only things capable of outspeeding you are Barraskewda (outclassed by Floatzl of all things), Choice Scarf Double Speeders (which is just fucking stupid), and Unburden Accelgor (which is stupid and not in the game). And you're not outspeeding it with Ditto with how Unburden works. And guess what? It has the highest offensive for Unburden users, with 120 BP STABs in Gunk Shot and Close Combat. And then you can dunk on any Gholdangos with Night Slash, Tera Blast Dark, or Fire Punch after a Sword Dance, which I recommend over Acrobatics, even though Tera Flying Acro is about as strong as Hawlucha's Tera Flying Acro. So yeah even without Dire Claw it's stupidly broken.
I honest to god think now one actually looked at this Pokemon critically, or even at all besides its stats, because its fucking absurd. Dire Claw alone is a nightmare and puts Smogon in a tight spot. Since its an attacking move with 1/6 chance to put you to sleep, cartridge players are really screwed over as they don't have sleep clause to prevent sleep. Smogon might have to change Sleep Clause because of this busted ass move. Sneasle-H doesn't get Dire Claw, so banning just Dire Claw isn't much of a solution considering they didn't ban Last Respects initially because only 1 Pokemon got it. If Dire Claw isn't banned or Sneedler isn't, it's gonna be a massive difference between cart and sim play. Larger than those niche sleep power scenarios and larger than those VGC Stall scenarios. That's why I think this Pokemon will genuinely be historical. And more I talk about it, more realistic the proposition that a regular ass non-legendary could be AG because of a stupidly uncompetitive move. I'm being serious (for the most part at least).
Tier: Ubers
Explanation: No doubt this thing is gonna be Ubers now thanks to new Fighting coverage it gets. Doesn't need to have weird EV spread with Sub. It can now just hit Dark and Normal types.
Tier: Untiered
Explanation: Regular Tauros just sucks. Even the Combat form of its Paldea form has more use than regular Tauros.
Tier: UUBL
Explanation: Thundurus-I was UUBL last gen, and only thing that changed is that it gets Ice and Water coverage again in Tera Blast (though has Grass Knot, which may be preferred), and got a new signature move that's like special electric version of stone edge with a paralysis effect. It's ehh. Too strong for UU but I don't see it doing much in OU either with Ting-Lu, Great Tusk, and plenty of strong priority around.
Tier: UU
Explanation: Same as its base form, it was mildly changed and it was UU last gen. Hopefully Iron Treads drops to UU too.
Tier: RU
Explanation: I think Tornadus was the one buffed the most between the base form Genies, but buffed the most doesn't mean you're broken. Bleakwind Storm is definitely the best out of the genie signature moves dues to the stat drop in speed, which imo is better than Hurricane's confusion chance. Additionally Tornadus benefits the most from Tera since it allows Tornadus to give itself a secondary STAB, probably Tera Blast Ground or something. Was NUBL and would probably fit nice in RU with how fast it is and the buffs it gets.
Tier: OU
Explanation: Same can't be said for Tornadus's Therian form. Losing Defog and Knock Off is a big blow it its pivoting supportive sets. Though with Defog it's still be a big blow with Gholdango running around. But Torn-T is still an incredibly fast pivot who is pretty strong against several offensive threats in the tier, namely Great Tusk, Cinderace, Roaring Moon before a boost, and Specs Iron Valiant. It appreciates Bleakwind Storm too since Sun being everywhere lowers Hurricane's accuracy by a lot. Additionally offensive Torn is still as viable, if not more viable now.
Tier: PU
Explanation: Pretty garbage pokemon competitively honestly. Like Typhlosion is NU at best once it drops, while Typhlosion-H is imo worse Typhlosion. This is because instead of a cool ability like Decidueye with Scrappy and Samurott with Sharpness, Typhlosion gets fucking Frisk. Additionally it also has worse speed, and that drop in speed is pretty significant in the lower tiers. You get outsped by tons of base 100s and speed tie base 95s, while regular Typhlosion speed ties the former and outspeeds the latter. Only thing it has is Infernal Parade and STAB ghost moves.
tbh, I do like that Hisui Typhlosion isn't just a straight upgrade from Typhlosion and is instead a sidegrade arguably. Many regional forms are just straight upgrades.
Tier: UU
Explanation: I think a lot of people are overrating Ursaluna's viability, probably looking at its STAB Guts boosted Facades off its massive 140 Atk and thinking how strong that is. Looking at Ursaluna for a bit, it's not all that great actually for OU, and even is manageable in UU too. Major problem of Guts users is that Guts constantly eats away at your health, literally burning away your longevity. Majority of Guts users have been incredibly slow, and when they weren't slow they were weak or frail. Imo Ursaluna's problems are;
1. Its speed stat is incredibly slow, and reaches 199 with Adamant. This is especially trolly because after a +1 boost from Trailblaze, guess what outspeeds you? Yup, it's Great Tusk by 2 whole state points. So you need to run Jolly and cut into your power.
2. Its only means to offset burn is UnSTAB Drain Punch, and between Sword Dance, Facade, Headlong Rush/Earthquake, and Trailblaze, it's tough to fit on Ursaluna and honestly doesn't do much either.
3. Corviknight, especially Corviknight with Rocky Helmet or Body Press. And btw, Corviknight take Close Combat too
252+ Atk Guts Tera Normal Ursaluna Close Combat vs. 248 HP / 252+ Def Corviknight: 158-187 (39.5 - 46.8%) -- guaranteed 3HKO after Leftovers recovery
Corv then proceeds to Roost till your in Body Press range from Burn and Def drops.
4. UU also has options for Ursaluna and options that are arguably better for the bulky wallbreaker archetype like Tyranitar, who chips you passively instead of Ursaluna chipping itself. Also like you outspeed 5 Pokemon and speed tie with Donphan.
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Tier: Uber
Explanation: I put these 2 together since honestly both are broken. They got Sword Dance and Trailblaze, and can get an Adaptability boost with Tera, and now have upgraded Protective Pads. They are busted and I'm surprised how many people are saying Rapid Strike is gonna be OU.
Tier: PU
Explanation: The least buffed of the Lake Trio, but for PU standards it's good. It was Untiered last time with a niche in PU, but now its niche is greater and in a PU with less Pokemon. Before it was used on Grassy Terrain HO teams as a Stored Power, and now you can use that set with Tera, as either coverage or protecting yourself from status.
Tier: Literally same as Vivillon
Explanation: Literally is no different from regular Vivillon besides having a cool pattern. That's it pretty much (though I don't have a degree in Vivillonology)
Tier: OU
Explanation: Volcanion did lose Defog (and Sludge Wave :'( ), but almost all Volcanion were all out attackers. What it didn't lose was Scald/Steam Eruption (and Sludge Bomb :D), which is great for it since its a one of a kind this Gen. Its also a great check to Walking Wake, and is a good abuser of Tera. Tera Ground being ideal since it gives you immunity to Electric, resist Rock, become neutral to Ground, give STAB to Earth Power, and also only have 2 weaknesses.
Tier: PU
Explanation: Honestly the most PU of all time. Slow, semi-bulky, mixed attacker. It has Intimidate and Sap Sipper, and Psyshield Bash is decent, but overall the PU of all time.
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Tier: Ubers
Explanation: With the nerfs, duh
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Tier: Ubers, possible OU
Explanation: I previously made a rant about these 2, and with the changes overall nerfing then, especially Zama-Hero, I think it might be fair to test them in OU. Yeah NatDex recent suspect Zama-H, but it also has Z moves and Pursuit support in that Meta. It's not as good here as in NatDex, and here I even argue Hero form is outclassed by Iron Valiant. I also think Crowned form could be OU too, as while it has Body Press, pure Body Press sets are shit and easy to wall, and otherwise does nothing Hero form can't do besides tank some hits, which it's worse at doing now because of said nerfs.
Tier: OU
Explanation: Easy OU. Being one of the best Fighting and Ground checks in the game, and a Flying type not weak to Electric. Similar to Torn, it lost Defog, but is a bit more upsetting since it has strong Thunderbolt and Heat wave for Gholdango. It also lost Weather Ball too. But you can't understate how good Electric/Flying is defensively when you also have Roost, U-turn, and Thunderbolt.
Tier: UUBL/OU
Explanation: Gapdos is definitely a strong Pokemon, however Gapdos suffers a bit after losing Dark coverage. This coverage is pretty significant as Gapdos now only has Stomping Tantrum as a means to hit Gholdango. So it's in a pickle where it's bad against Gholdango, but with its typing pretty good against Great Tusk not running Ice Spinner. It additionally has to compete with Great Tusk and Iron Valiant as the Fighting type on a team, which I think it can compete now that is has Trailblaze + Bulk up. We'll have to see.
Tier: UU/OU
Explanation: Zarude is an excellent Pokemon and greatly benefits from Tera. It has basically the perfect stat distribution got a Pokemon with 600 BST and isn't ridiculously minmaxed. Its typing is like Tyranitar's where it's surprisingly good defensively despite the massive weaknesses, though those weakness still exist and are prominent. Whether its UU or OU, we'll have to see, but it'll still be great in OU anyways.