Blissey @ Utility Umbrella  
Ability: Natural Cure  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
- Seismic Toss  
- Soft-Boiled  
- Thunder Wave  
- Teleport  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 252 HP / 72 SpD / 184 Spe  
Jolly Nature  
- Knock Off  
- Roost  
- Defog  
- Foul Play  

Zygarde @ Leftovers  
Ability: Power Construct  
EVs: 204 HP / 248 Def / 56 Spe  
Impish Nature  
- Glare  
- Thousand Arrows  
- Rest  
- Coil  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 252 HP / 240 Def / 16 SpD  
Impish Nature  
- Stealth Rock  
- Sunsteel Strike  
- Morning Sun  
- Thunder Wave  

Zacian @ Choice Band  
Ability: Intrepid Sword  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Play Rough  
- Close Combat  
- Crunch  
- Wild Charge  

Eternatus @ Power Herb  
Ability: Pressure  
EVs: 4 Def / 252 SpA / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Flamethrower  
- Meteor Beam  
- Recover