A few of my own thoughts here:
Nope. Nope nope nope. Get this shit out of here.
Clefable has been strictly buffed in every possible sense as a result of Home's release. Not only are all its Magic Guard sets directly improved courtesy of Soft-Boiled being objectively better than Moonlight, but at long last it got Unaware back to allow it to function as a solid Hydreigon check. Clef is easily one of the best mons in the tier as is and with these buffs I think it'll probably be the absolute queen of OU once the meta settles and the broken elements are dealt with accordingly.
I'm absolutely terrified that Toxic will push Aegislash over the edge once again. None of Aegislash's decidedly limited checks have any business eating up a Toxic if they predict incorrectly, and Toxic acts as a powerful option for Choiced and non-Choiced sets alike due to its ability to fill in the holes in Aegislash's limited movepool.
Well, OU's melanoma has finally gotten Toxic back. This further improves its role as a dedicated trapper by leaving something with a pretty nasty present after it's already done its job of trapping and eliminating a bunch of stuff.
An absolute threat. Jirachi may not appreciate all the Ghosts and Knock Off spam everywhere, but Jirachi is always good simply because it's either really good at being a Choice Scarfer or Rocker or pretty good at doing basically anything under the sun.
EASILY the most exciting addition to the metagame, IMO. Melmetal is a terrifying breaker that just clicks its buttons and blows gaping holes in your opponent's team, and fat teams tend to have a really hard time dealing with it. I'm really interested to see how it fares in this meta considering how good it was in NatDex.
Drei gets new options. New options are always objectively better. Drei can now utilize more defensively-oriented sets and has another option to increase its longevity against slower teams (or to potentially just run Life Orb on a 2-attacks set so it can break past Unaware Clefable).
Ohhhhh baby. While I think the addition of Toxic benefits Rotom-Heat the most by a country mile, let's not forget that Rotom-Wash and Rotom-Mow also get stuff out of this. Toxic is obviously the best re-addition to their movepool, but Defog gives them more options. And like I said: more options make for an objectively superior mon.
These three stand out as the mons that best utilize Knock Off as an offensive support move instead of just a support move. It's a huge power boost for Weavile and Bisharp but Conk getting Knock Off is an absolutely massive deal, as it now regains valuable utility and powerful coverage alike all in a single moveslot. I've been looking forward to Defog+Knock Off for a very long time and it has finally arrived.
I can also see Smack Down having some potential luring potential against Corviknight but that's such a gimmick compared to the very real threat of removing its Leftovers instead.
Terrakion would go to town on a Duggyless metagame. 108 Speed is fantastic once again, and Terrakion packs a brutal offensive typing and brutal offensive statline to break virtually everything in the tier clean in two. Aegislash being good doesn't really help it TOO much, though.
I was already a bit harsh on Togekiss in the post-Dynamax metagame, but with Defog and Roost back on the menu Togekiss genuinely has a plethora of utility options at its disposal once again, letting it better function as a great tank.
EXTREMELY sleeper threat, IMO. Weather Ball+Chlorophyll finally being compatible is God's gift to Sun teams everywhere and Venusaur even adds Earth Power to its impressive repertoire of coverage options, ensuring that in the not-so-distant future Sun teams will have something capable of muscling past the best Sun counters out there. In a meta with Dugtrio this thing benefits extremely well from the potentially-absurd core of Eject Pack Ninetales+Dugtrio to lure and eliminate Toxapex since, well... Toxapex is one of two things that has any business coming in on a +2 Life Orb Venusaur. I would put my hands in fire to say that Venusaur is slated to be the best weather-dependent sweeper we've seen since the heyday of Sand Rush Excadrill back in Gen 5. This thing seriously has fucking everything going for it.
Powerful breaker that can check Hydreigon in a pinch due to its crucial Water typing giving it a niche over the other fairies.
Air Slash is a nice addition, but Hidden Power getting removed is a massive PITA for Keldeo since now it's even easier to counter. It gets blanked by a lot of the stuff people run to ensure that their teams don't get mauled by Dracovish and then some more stuff on top of that, but I can see it being quite the threat with the right support.
Freeze-Dry makes this thing impossibly difficult to wall. I can see Kyurem being an OU staple for its ability to break Balance unlike anything else thanks to the insane coverage Freeze-Dry+Earth Power offers, but Ice Beam might still be run because it hits standard Ice-weak targets that much harder.
Keldeo counter? Keldeo counter, plus a Dracovish check, plus a Defogger. Gets prone-boned by the Rotoms but offers a great deal of role compression otherwise, so I can see Mantine having a very respectable niche in this tier now.
Post-testing edits:
- Venusaur is actually that good. It's a bit of a pain to support but in this meta it's able to steamroll past most teams when paired with Dugtrio support. Do note that it cannot OHKO standard Dragapult sets from full, though, so Dragapult can check it in a pinch.
- KB is as broken as everyone expected it to be and then some. This thing and Clefable were on almost all of my opponents' teams in about 20 games as well as on my own team I've been experimenting with, and virtually every single game involving KB involved both of us playing like absolute degenerates to prevent it from getting a single free turn to set up and automatically losing if it got said free turn unless there was a very healthy Melmetal in the back. Melmetal is the only thing that can reliably survive an interaction with Kyurem-Black since it has a chance of just 5-hitting its way past most defensive shit. This mon is fucking unbelievable and is even more of an issue than Dugtrio at the moment.
- Clefable is literally everywhere. This thing is at OR/AS levels of viability right now and offers so much to any sort of team archetype it finds itself on.
- Whenever I see KB I usually see Dugtrio paired with it. Melmetal is KB's only real defensive answer and Dugtrio either kills it outright or dents it severely enough to where it can't even check KB anymore.
- Have I mentioned Dugtrio enough in this edit? The mon is absolutely fucking stupid and this has become especially true in this new meta courtesy of the absolute monstrosities it's able to support.