Kommo-o @ Kommonium Z  
Ability: Soundproof  
Level: 50  
EVs: 4 HP / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Clanging Scales  
- Protect  
- Aura Sphere  
- Flash Cannon

Unown
Options:
- offensive: Flamethrower
- supportive: Substitute, Clangorous Soul
- items: Throat Spray, Sitrus Berry
- Ability: Overcoat

Unown
Offensive calcs:
- +1 252 SpA Kommo-o Aura Sphere vs. 0 HP / 0 SpD Arctozolt: 206-246 (124.8 - 149%) -- guaranteed OHKO
- +1 252 SpA Kommo-o Flash Cannon vs. 252 HP / 4 SpD Mega Ninetales-Alola: 184-220 (102.2 - 122.2%) -- guaranteed OHKO

Unown
Useful partners:
- Pokémon that threaten Fairy Pokémon: Mega Gengar, Mega Metagross, Kartana

Kommo-o @ Leftovers  
Ability: Soundproof  
Level: 50  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Body Press  
- Iron Defense  
- Substitute  
- Protect

Unown
Options:
- supportive: Taunt, Toxic
- Ability: Overcoat

Unown
Offensive calcs:
- 252+ Def Kommo-o Body Press vs. 0 HP / 0 Def Arctozolt: 162-192 (98.1 - 116.3%) -- 81.3% chance to OHKO
- 252+ Def Kommo-o Body Press vs. 4 HP / 0 Def Excadrill: 218-260 (117.2 - 139.7%) -- guaranteed OHKO
- +2 252+ Def Kommo-o Body Press vs. 252 HP / 0 Def Glastrier: 236-278 (114 - 134.2%) -- guaranteed OHKO
Defensive calcs:
- 252 Atk Zapdos-Galar Brave Bird vs. 252 HP / 252+ Def Kommo-o: 126-150 (69.2 - 82.4%) -- guaranteed 2HKO

Unown
Useful partners:
- Pokémon that threaten Fairy Pokémon: Mega Gengar, Mega Metagross, Kartana
- an answer to Ghost Pokémon: Urshifu-Single Strike, Galarian Moltres, Incineroar