Skarmory @ Heavy-Duty Boots  
Ability: Sturdy  
EVs: 252 HP / 232 Def / 24 Spe  
Impish Nature  
IVs: 0 Atk  
- Spikes  
- Whirlwind  
- Counter  
- Roost  

Groudon @ Life Orb  
Ability: Drought  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Precipice Blades  
- Swords Dance  
- Rock Polish  
- Stone Edge  

Eternatus @ Black Sludge  
Ability: Pressure  
EVs: 248 HP / 228 SpD / 32 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Mystical Fire  
- Toxic  
- Recover  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
- Stealth Rock  
- Morning Sun  
- Sunsteel Strike  
- Thunder Wave  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 248 HP / 8 Def / 252 SpD  
Careful Nature  
- Knock Off  
- Roost  
- Sucker Punch  
- Snarl  

Xerneas @ Leftovers  
Ability: Fairy Aura  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Moonblast  
- Rest  
- Aromatherapy  
- Thunder Wave