Mew @ Red Card  
Ability: Synchronize  
EVs: 252 HP / 4 Def / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Taunt  
- Stealth Rock  
- Misty Explosion  
- Spikes  

Groudon @ Life Orb  
Ability: Drought  
EVs: 104 HP / 252 Atk / 152 Spe  
Adamant Nature  
- Aerial Ace  
- Precipice Blades  
- Swords Dance  
- Stone Edge  

Blissey (F) @ Utility Umbrella  
Ability: Natural Cure  
EVs: 4 HP / 252 Def / 252 SpD  
Sassy Nature  
IVs: 0 Atk / 0 Spe  
- Healing Wish  
- Soft-Boiled  
- Thunder Wave  
- Teleport  

Yveltal @ Life Orb  
Ability: Dark Aura  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Dark Pulse  
- Oblivion Wing  
- Taunt  
- Sucker Punch  

Necrozma-Dusk-Mane @ Weakness Policy  
Ability: Prism Armor  
EVs: 124 HP / 252 Atk / 132 Spe  
Adamant Nature  
- Sunsteel Strike  
- Earthquake  
- Dragon Dance  
- Stone Edge  

Marshadow @ Life Orb  
Ability: Technician  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Poltergeist  
- Close Combat  
- Shadow Sneak  
- Bulk Up