Groudon @ Leftovers  
Ability: Drought  
EVs: 252 HP / 240 Def / 16 Spe  
Impish Nature  
- Earthquake  
- Roar  
- Stealth Rock  
- Rest  

Ferrothorn @ Leftovers  
Ability: Iron Barbs  
EVs: 252 HP / 4 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Spikes  
- Leech Seed  
- Gyro Ball  
- Knock Off  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 252 HP / 232 SpD / 24 Spe  
Calm Nature  
IVs: 0 Atk  
- Foul Play  
- Oblivion Wing  
- Defog  
- Roost  

Blissey (F) @ Heavy-Duty Boots  
Ability: Natural Cure  
EVs: 252 Def / 252 SpD / 4 Spe  
Calm Nature  
- Soft-Boiled  
- Seismic Toss  
- Heal Bell  
- Healing Wish  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
EVs: 144 HP / 216 Atk / 36 Def / 112 Spe  
Adamant Nature  
- Play Rough  
- Close Combat  
- Wild Charge  
- Swords Dance  

Eternatus @ Life Orb  
Ability: Pressure  
EVs: 160 HP / 252 SpA / 96 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Sludge Bomb  
- Flamethrower  
- Recover