Eternatus @ Shuca Berry  
Ability: Pressure  
EVs: 252 HP / 52 Def / 188 SpD / 16 Spe  
Timid Nature  
IVs: 0 Atk  
- Mystical Fire  
- Toxic  
- Dynamax Cannon  
- Recover  

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

Necrozma-Dusk-Mane @ Lum Berry  
Ability: Prism Armor  
EVs: 240 HP / 236 Def / 32 Spe  
Impish Nature  
- Dragon Dance  
- Sunsteel Strike  
- Earthquake  
- Morning Sun  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 252 HP / 4 Def / 252 SpD  
Careful Nature  
IVs: 28 Spe  
- Knock Off  
- Roost  
- Defog  
- U-turn  

Groudon @ Leftovers  
Ability: Drought  
EVs: 240 HP / 16 Atk / 196 SpD / 56 Spe  
Adamant Nature  
- Stealth Rock  
- Precipice Blades  
- Stone Edge  
- Swords Dance  

Calyrex-Shadow @ Choice Scarf  
Ability: As One (Spectrier)  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Astral Barrage  
- Psyshock  
- Aromatherapy  
- Trick