Tier list time.
Yeah these two definitely still define the S5 meta for me and the new additions to the meta have generally been favorable to them. Garchomp has more Fire-types to check with the addition of Volcanion (and the unviable Heatran) and faces a decline in multi-hit moves with OHKO potential with past threats such as Porygon-Z taking a hit in viability because of the comparison with Meloetta. It doesn't win 1 on 1 against the new Steels, but this is where Armarouge has shined even more, being able to check Steels, new and old, as well as blow up just about anything with its perfect coverage. It has even mandated the creation of a specific Melmetal spread in this community, showing its influence.
Melmetal has been introduced as the newest sturdy glue Steel-type which can just be swapped in to force people to disengage or grab kills in crowded environments with its hard to avoid Double Iron Bash. It's like if Metagross were good, as it leverages much the same effective coverage but actually gets kills off of not being blown up by stray Heat Waves right away. People often won't want to engage this thing because it will eat whatever you threw at it and give another person a point, which helps it deter people from going after you. This has prompted people to look for OHKO calcs on Melmetal, with the exact Melmetal spread I was talking about earlier making some Armarouge adapt Armor Cannon into their movesets on ladder just for that purpose. Yeah, we all went in with the idea that this thing would be very good and quite influent and were very right.
Golisopod feasts off of the Psychic-type snipers introduced this season and the subsequent rise in those, what with Armarouge, Meloetta and the Hoopas being pretty significant presences on ladder. First Impression+ has proven as effective as last meta in keeping non-Steel snipers and weakened glues alike in check by punishing poor positioning with kills. Less Thunderbolt (at least, in my experience) means less risk of getting sniped while doing your thing, though it is sometimes present on Psychic-types' sets so watch out.
I have seen much less Gholdengo on ladder this season off of people often preferring Melmetal or Magearna, which makes me unwilling to put it in A+, but it still is the same slippery fucker it has always been and its typing gives it key resistances to Golisopod's First Impression, Meloetta's STABs and Magearna and Clefable's whatever while outrunning EQs for days or stomaching them with Shuca Berry. The new Volcanion and Marshadow, as well as Hoopa-Unbound which has been taken up by our community, have added to its unkind matchups this season, but overall it still is pretty strong!
Meloetta has taken up Porygon-Z's mantle of a Hyper Beam user being able to blast off many Pokémon at the blink of an eye but also to leverage other great sniping options, namely Psychic and Thunderbolt here. And much like Porygon-Z, it hates being dived on by physical threats such as Garchomp and especially Golisopod, but holds its own against Special threats off of a high Special bulk bolstered by Calm Mind. Its typing alone also makes it a workable answer to Marshadow. A bit sad I couldn't test this Pokémon more off of finding its rift a bit late but what I've used and seen of it was scary. It can and WILL blow you up if you're not on your Steel-type.
Magearna is the other great sniper of this season, leveraging its great coverage and strong Fleur Cannon into opportunities to take favorable trades with Shuca Berry and get kills. With its Fairy/Steel defensive typing, it holds the niche of being a Steel-type that doesn't lose to Marshadow, which has made me put it in more teams than I'd care to admit, but it lacks Melmetal's raw bulk and Gholdengo's speed, making it the least viable of our top Steel-types in my view.
I have been loving Marshadow this season as a great anti-lead to Garchomp, its tracking Spectral Thief answering stuff like Armarouge and Gholdengo (and even less viable stuff like Dondozo which I am not a fan of), and nuclear Close Combats netting one of the only Melmetal one-shot calcs. It excels best in giving you early leads to solidify later in the game but can be called upon to trade off of being a Sashed mon with perfect neutral coverage if need be.
You'd think the rise in Steels would make Clefable take a harder hit but here it is in A-! Turns out being a great answer to Garchomp, a sniper resistant to First Impression, and wielding coverage for days, among which Meteor "Best move in the game" Beam for Fire-types, still makes it very viable. I don't have much else to say about Clefable, it's still very solid.
Volcanion has solidified itself as the second best Fire-type in the tier. When Season 6 dropped, I said it left me unimpressed. How wrong I was. Its wide coverage and great bulk coupled with a chance to burn Pokémon with Steam Eruption have made it surprisingly tricky to deal with since Garchomp as an answer may get punished for switching in.
Swampert and Marowak figure in this spot of the tier list off of being alternate Ground-type picks to Garchomp that win against Melmetal but pale in comparison because of their matchup into Solar Beam-wielding Fire-types. They are still very workable and I've been seeing them a lot. Marowak in particular bypasses Shuca Berry strats thanks to its two-hit tracking move Bonemerang.
Very viable mons end here imo.
I would describe Hoopa-Unbound as an A-tier mon with C tier maneuverability. Its matchup spread into top metagame mons is immaculate: you get OHKOs against pretty much everything except Magearna between nuclear Psychics, Hyperspace Fury decimating Psychic resists, and your coverage choice between Focus Blast and Thunderbolt giving you either the jump on Melmetal or further sniping opportunities. That makes it a very interesting mon on paper. But in practice, it is riddled with the arm dance disability meaning taking it up is quite a learning curve, on top of low physical bulk and a high susceptibility to Golisopod. Missing autocasts with it can as such be game losing as you will miss your move then get dived on easily, so while it is a very great mon once it has been learned, I wouldn't actually advise friends unversed in competitive to play it. Hence it leads the B+ tier instead purely off of how hard it is to get a hang on.
Screens with its poster child Ampharos and Mega-Pokémon have definitely taken a hit in a Plus Move-hungry meta like this one, though Absol-Z and Skarmory-Mega still have very interesting matchup spreads into the meta, while I have seen Garchomp-Mega and Lucario-Z pop off and Ampharos adapting with offensive sets, so they still have to be respected.
Hoopa-Confined, Charizard and Corviknight are both sidegrades of very viable Pokémon (Meloetta, Armarouge and Skarmory respectively) that do a specific thing differently. Hoopa-Confined leverages Shadow Ball to get the jump on Armarouge, as well as a faster speed and Hyperspace Hole iframes if you're using that, while Charizard cleanly one-shots Melmetal with Blast Burn, leveraging its immunity to Earthquake to come in more easily, and chunks resists for a lot. As for Corviknight, it leverages Curse/Bulk Up and Plus Flying attacks into repositioning and bringing defensive utility over Skarmory's offense. As such, those are good choices on specific comps.
Sirfetch'd is Sirfetch'd. You still just crit through everything but now there are Melmetals, but also Magearnas and Meloettas which are awkward.
Poster child of Japan Porygon2 still does not die and therefore can run around and get snipes on weakened Pokémon. However, its efficiency in high pressure lobbies is low because opposing OHKOes means it doesn't snipe and it will get ignored, and it doesn't like Marshadow and Calm Mind Pokémon being relevant.
For the upcoming season, I intend on using a comp that has been discussed at length already: Garchomp + Kyogre + Steel, but I will be using a variant with Gholdengo over Melmetal. I'd like to thank Vengeance417 for the very interesting Kyogre spread! I will definitely be using it.
I have my eyes on pretty much every restricted aside from Zygarde and Yveltal, on Armarouge (whose viability might be affected by the arrival of stuff like Kyogre and Groudon, wondering how it will fare), and on Screens making a grand comeback, maybe with Rotom variants to either threaten Groudon with Hydro Pump (Wash) or be immune to its Earthquakes and take advantage of less Stone Edge Garchomp with the return of Xerneas mandating Poison Jab (Fan). I'll have to bother friends to get MMX though since that's on my radar of things to test.