A couple insights on the meta so far:
Octolock is a fun as hell move when combined with PH. Here's my favorite mon to use.

SKWEEZY JIBBS (Mewtwo) @ Toxic Orb
Ability: Poison Heal
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Photon Geyser
- Earth Power
- Spore
- Octolock
improof: mandibuzz, a sturdy magic bouncer
With Octolock + Spore, you get to stall out turns while slowly dropping the opponent's defenses until you can easily KO them. It's notable that Octolock bypasses Magic Bounce, so even if you can't Spore them, you can still trap and eliminate them. I've tried Zacian (uncrowned) with Play Rough/EQ and Zamazenta (uncrowned) with Low Kick/KOff or Icicle Crash but Mewtwo's really cool cause it can set its own terrain with Dynamax, hits basically everything neutral, and has a beefy Special Attack stat.

millenial humor (Toxapex) @ Rocky Helmet
Ability: Prankster
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD
Relaxed Nature
IVs: 0 Atk / 0 Spe
- Haze
- Strength Sap
- Slack Off
- Scald
improof: trappers, PH or MG users
Basically Prankster Giratina but on a Toxapex. Rocky Helmet is great for catching non-Protective Pads Shedinjas and chipping Double Iron Bashers hard while Scald spreads handy burns.
[insert zacian here]
THE I'M (Zacian-Crowned) @ Expert Belt
Ability: Intrepid Sword
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe
Jolly Nature
- Double Iron Bash
- Play Rough
- Bolt Strike
- Pyro Ball
improof: shedinja
This is a fairly effective set, functioning similarly to SF MMY in Gen 7. It hits its usual checks in Toxapex, Golisopod, Zekrom, and others, and has the freedom to switch moves unlike Gorilla Tactics and Choice Band sets. Watch out for Rocky Helmet chip, though.

boomer (Kyurem-White) @ Choice Specs
Ability: Refrigerate
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Boomburst
- Earth Power
- Moongeist Beam
- Volt Switch / Draco Meteor (if you want dynamax STAB)
improof: IS users
Due to the centralization around physical attackers, Kyurem-White is a nice anti-meta pick, breaking through basically anything that lacks Assault Vest or Ice Scales. It is pretty slow, though, so it can't stay in on fast walls (like ZZC or Eternatus).

ok boomer (Type: Null) @ Eviolite
Ability: Ice Scales
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe
Careful Nature
- Anchor Shot
- Spectral Thief
- Slack Off
- Entrainment
improof: itself
Basically a bootleg FC Chansey that can actually do things like not be passive. This basically beats any special attacker except like Photon Mewtwo with boosting abilities and stuff like that. Moveset is pretty customizable, similar to FC Chansey, but you can actually use attacks that aren't Metal Burst.
any wall @ Rocky Helmet / Heavy Duty Boots (if weak to SR) / Eviolite (if unevolved)
Ability: Magic Bounce
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD
Relaxed / Sassy Nature
- Worry Seed
- Court Change
- Recover
- U-Turn
improof: depends on mon
Magic Bounce + Court Change is pretty good synergy because you swap hazards and then prevent them from getting set again on your side. Yeah

zimbabwe (Shedinja) @ Heavy-Duty Boots
Ability: Sturdy
EVs: 69 HP / 69 SpA
Quiet Nature
IVs: 21 HP / 0 Atk / 0 Def / 21 SpA / 0 SpD / 0 Spe
- Pain Split / Endeavor?
- Stealth Rock
- Teleport
- Baneful Bunker / Extreme Speed
improof: Magic Bouncers, basically anything
This is probably the optimal HDB Shedinja set, minimizing any contact with Rocky Helmet. Pain Split is not as effective but it's certainly still pretty good pressure against fat walls; Stealth Rock is Stealth Rock; Teleport allows you to underspeed basically everything; and Baneful Bunker is pretty useful for scouting KOff, Mold Breaker moves, etc. If you have a dedicated KOffer for Rocky Helmet, you could theoretically use the regular Endeavor-Extreme Speed combo too.