Aurorus @ Aurorite  
Ability: Snow Warning  
Level: 50  
EVs: 196 HP / 60 Def / 252 SpA  
Modest Nature  
IVs: 0 Atk  
- Thunderbolt  
- Calm Mind  
- Blizzard  
- Protect

Unown
Move options:
- offensive: Earth Power, Ice Beam, Frost Breath, Parabolic Charge

Unown
Offensive calcs:
- +1 252+ SpA Aurorus Blizzard vs. 252 HP / 4 SpD Assault Vest Rillaboom: 206-246 (99.5 - 118.8%) -- 93.8% chance to OHKO
- +1 252+ SpA Aurorus Thunderbolt vs. 252 HP / 76+ SpD Tapu Fini: 174-206 (98.3 - 116.3%) -- 87.5% chance to OHKO
Defensive calcs:
- 252+ SpA Tapu Lele Psychic vs. 196 HP / 0 SpD Mega Aurorus in Psychic Terrain: 93-111 (41.7 - 49.7%) -- guaranteed 3HKO
- 252+ SpA Tapu Lele Shattered Psyche (175 BP) vs. 196 HP / 0 SpD Mega Aurorus in Psychic Terrain: 181-214 (81.1 - 95.9%) -- guaranteed 2HKO
- 252 Atk Urshifu-Single Strike Close Combat vs. 196 HP / 60 Def Aurorus: 188-224 (84.3 - 100.4%) -- 6.3% chance to OHKO

Unown
Useful partners:
- screen setter: Grimmsnarl
- healing / redirection: Comfey, Tapu Fini, Blastoise, Clefairy, Indeedee
- Hail abuser: Arctovish, Arctozolt

Aurorus @ Aurorite  
Ability: Snow Warning  
Level: 50  
EVs: 244 HP / 36 Def / 84 SpA / 140 SpD / 4 Spe  
Calm Nature  
IVs: 0 Atk  
- Volt Switch  
- Aurora Veil  
- Blizzard  
- Protect

Unown
Move options:
- offensive: Earth Power, Ice Beam, Frost Breath
- supportive: Icy Wind, Thunder Wave, Encore, Roar

Unown
Defensive calcs:
- 252 Atk Urshifu-Single Strike Close Combat vs. 244 HP / 36 Def Aurorus: 194-230 (84.7 - 100.4%) -- 6.3% chance to OHKO
- 252 SpA Mega Charizard-Y Heat Wave vs. 244 HP / 140+ SpD Mega Aurorus: 98-116 (42.7 - 50.6%) -- 2% chance to 2HKO
- 252+ SpA Mega Charizard-Y Overheat vs. 244 HP / 140+ SpD Mega Aurorus: 194-230 (84.7 - 100.4%) -- 6.3% chance to OHKO
- 252 SpA Life Orb Sheer Force Landorus Earth Power vs. 244 HP / 140+ SpD Mega Aurorus: 164-195 (71.6 - 85.1%) -- guaranteed 2HKO

Unown
Useful partners:
- Hail abuser: Arctovish, Arctozolt
- answers to Fire and Fighting Pokémon: Tapu Fini, Tapu Lele, Urshifu-Rapid Strike, Landorus-T, Landorus-I

Aurorus @ Aurorite  
Ability: Snow Warning  
Level: 50  
EVs: 244 HP / 252 Def / 12 SpD  
Bold Nature  
IVs: 0 Atk  
- Volt Switch  
- Aurora Veil  
- Blizzard  
- Protect

Unown
Move options:
- offensive: Earth Power, Ice Beam, Frost Breath
- supportive: Icy Wind, Thunder Wave, Encore, Roar

Unown
Defensive calcs:
- 252+ Atk Glastrier High Horsepower vs. 244 HP / 252+ Def Mega Aurorus: 92-110 (40.1 - 48%) -- guaranteed 3HKO
- 252 Atk Urshifu-Rapid Strike Close Combat vs. 244 HP / 252+ Def Mega Aurorus through Aurora Veil: 97-116 (42.3 - 50.6%) -- 1.2% chance to 2HKO

Unown
Useful partners:
- Hail abuser: Arctovish, Arctozolt
- answers to Fire and Fighting Pokémon: Tapu Fini, Tapu Lele, Urshifu-Rapid Strike, Landorus-T, Landorus-I