High tier
: SpDef and fast sub-tox look to both be good here. Gliscor also a practical requirement as Aegi's no1 counter with how strong that looks.
: Premier PhysDef option. With Garchomp looking to be back on top Skarm will no doubt see use. Pinsir-Mega will also not like seeing this at preview.
: The very high HP may allow it to take on Seismic Toss Kang. Wish support, with Regen, is also a particulalry nice option.
: Spore, Clear Smog, Foul Play and all of its usual nice stuff. Another strong regen option. Though its powder immunity isn't too strong here with no Breloom and Vivillon being one of the scarier sleep users.
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: Sadly the mega isn't available. However, they both remain strong options thanks to Regen and decent bulk. CM and Iron Defence and even AV could all be useful.
: Thick Fat. Always the mon everyone forgets about when building, then procedes to panic about when they see it in preview. Very few pokemon have super effective STAB here. Generally gonna do what it always does. 3-attacks Synth, Leech Seed, Amnesia, all sorts of stuff for it to work with.
: The only good Unaware option.
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: Shadow Tag user which can quickly take advantage of all the Toxic being thrown about by picking off mons with Hex. Can also spread burns with Will-o-Wisp or eliminate threats with some Perish Song trapping.
: Anti-Gengar and Charizard. Strong special bulk, and equipped with a Lum Berry, it's able to trap Gengar with Pursuit and deal with Charizard Y thanks to Sand Stream. With Lum, it may also find itself as an anti-vivillon option.
Mid tier
: Strong SpDef based bulk. Recycle-Gluttony provides an interesting form of recovery. Though the lack of Toxic immunity may hinder it, I don't think Immunity will find too much use.
: SR weakness is a big problem, but it's still a bulky mon, and one which can pressure stall.
: Sand damage adds up and can progress the game even if only by a little. It's strong phys bulk and access to Whirlwind, Slack Off and Stealth Rock are all valuable. Semi stall teams could opt for a hybrid set which utilises the Yawn shuffling lead.
: Very good bulk with solid typing. Has a variety of options ranging from using bulky SD, to Iron Defence or even Curse (GSC VC transfer). Would likely find itself a strong fit on semi-stall more than full, but an option to consider regardless.
: Unique and interesting typing, and a relatively fast Wisp user. Decent bulk and recovery make this usable, though the SR weakness hurts.
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: Faster than Gengar-Mega Pursuit user. Also threatens Charizard X/Y and Pinsir.
Niche stuff, but has some general viability
: Bulky Hydreigon with something like Taunt, Roost, Twave/Toxic and Dark Pulse. It has interesting tpying and surprisingly decent bulk when invested.
: Either Trick with Choice Specs/Scarf or lengthy ppstall/CMsetup. It's another Shadow Tag user.
: Sub-Toxic could work on some stall teams. Will require the Lefties and would appreciate Wish support.
: Sap Sipper and generally huge Spdef. Coverage lets it pick and choose what it can directly beat.
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: Largely playing off their typing. Gourgeist can spread Will-o and wall certain Kang and Garchomp. Trevenant is more looking to Sub-Curse with it Harvest giving it back 50% berries. Leech Seed added in to the mix and they can wear down opposing teams.
(if you have Wish): Seismic Toss quickly breaks down pokemon. Having reliable recovery with its solid bulk could make it an effective option.
The rest have serious flaws, but remain usable as checks to specific mons.
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