Arctovish @ Assault Vest  
Ability: Water Absorb  
EVs: 248 HP / 116 Atk / 144 SpD  
Adamant Nature  
- Liquidation  
- Icicle Crash  
- Crunch  
- Stone Edge  

Groudon @ Leftovers  
Ability: Drought  
EVs: 252 HP / 4 Atk / 252 Def  
Impish Nature  
- Stealth Rock  
- Precipice Blades  
- Toxic  
- Rock Tomb  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 72 HP / 252 SpA / 108 SpD / 76 Spe  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Thunder  
- Moonblast  
- Focus Blast  

Eternatus @ Shed Shell  
Ability: Pressure  
EVs: 252 HP / 200 Def / 56 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Mystical Fire  
- Toxic  
- Recover  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 248 HP / 8 SpA / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Snarl  
- Toxic  
- Defog  
- Roost  

Necrozma-Dusk-Mane @ Weakness Policy  
Ability: Prism Armor  
EVs: 252 HP / 252 SpA / 4 SpD  
Modest Nature  
IVs: 0 Atk  
- Cosmic Power  
- Stored Power  
- Meteor Beam  
- Moonlight