Aegislash @ Ghostium Z  
Ability: Stance Change  
EVs: 252 HP / 8 Def / 248 SpA  
Quiet Nature  
- King's Shield  
- Toxic  
- Shadow Ball  
- Head Smash  

Mewtwo-Mega-X @ Mewtwonite X  
Ability: Unnerve  
EVs: 48 HP / 208 Atk / 252 Spe  
Naive Nature  
- Low Kick  
- Zen Headbutt  
- Ice Beam  
- Taunt  

Yveltal @ Charti Berry  
Ability: Dark Aura  
EVs: 248 HP / 180 Def / 80 Spe  
Impish Nature  
- Foul Play  
- Roost  
- Toxic  
- Sucker Punch  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 8 HP / 108 Atk / 140 SpD / 252 Spe  
Jolly Nature  
- Stealth Rock  
- Swords Dance  
- Precipice Blades  
- Stone Edge  

Ho-Oh @ Choice Band  
Ability: Regenerator  
EVs: 248 HP / 204 Atk / 52 SpD / 4 Spe  
Adamant Nature  
- Sacred Fire  
- Brave Bird  
- Toxic  
- Defog  

Arceus-Ground @ Earth Plate  
Ability: Multitype  
EVs: 252 HP / 40 Def / 24 SpD / 192 Spe  
Timid Nature  
IVs: 0 Atk  
- Judgment  
- Ice Beam  
- Recover  
- Defog