Dialga @ Choice Specs  
Ability: Pressure  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Draco Meteor  
- Fire Blast  
- Flash Cannon  
- Thunder  

Blissey (F) @ Utility Umbrella  
Ability: Natural Cure  
EVs: 4 HP / 252 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Seismic Toss  
- Aromatherapy  
- Confide  
- Soft-Boiled  

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

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 252 HP / 136 SpD / 120 Spe  
Careful Nature  
- Thunder Wave  
- Stealth Rock  
- Iron Head  
- Moonlight  

Groudon @ Leftovers  
Ability: Drought  
EVs: 252 HP / 108 Atk / 132 Def / 16 Spe  
Impish Nature  
- Bulk Up  
- Rest  
- Precipice Blades  
- Stone Edge  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 64 HP / 252 SpD / 192 Spe  
Jolly Nature  
- Foul Play  
- U-turn  
- Roost  
- Defog