Kommo-o @ Kommonium Z  
Ability: Soundproof  
EVs: 252 HP / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Clanging Scales  
- Flamethrower  
- Rest  
- Sleep Talk

Ninetales-Alola @ Light Clay  
Ability: Snow Warning  
EVs: 248 HP / 8 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Aurora Veil  
- Freeze-Dry  
- Moonblast  
- Roar

Serperior @ Firium Z  
Ability: Contrary  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Synthesis  
- Leaf Storm  
- Dragon Pulse  
- Glare

Haxorus @ Firium Z  
Ability: Mold Breaker  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Dragon Claw  
- Earthquake  
- Shadow Claw

Crustle @ Rockium Z  
Ability: Sturdy  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Earthquake  
- Spikes  
- Stealth Rock

Slowbro @ Slowbronite  
Ability: Regenerator  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Slack Off  
- Scald  
- Light Screen  
- Reflect

Screen = Win

by Singler

Serp's Z-Move OHKO's Magearna even without a Boost. -- Ninetales is a Good switch in to Opposing Kommo-O, though most of the ones I've faced don't run Soundproof so you own Kommo-O can work somewhat often too. Roar works occasionally from what I've used but can maybe be swapped out for a Hidden Power or something else -- Kommo-O can not only do it's signature Z-Move super often, but also has acces to Z-Sleep Talk for an increased Critical Hit ratio for Opoosing set-up -- Haxorus is importantfor KO-ing Mimikyu, breaking through Disguise with Mold Breaker and putting it in range of Serp or Nintales (either via an attack or Hail depending on how much HP) -- Crustle can take on many 'Mon in the tier thanks to Sturdy + Edge/Quake Coverage (tried X-Scissor for a while but rarely ever clicked it). Also works exceptionally well for setting up hazards of course as well, with Z-Spikes/Stealth Rock boosting defense allowing you to take on other bulky hazard setters better

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