Mewtwo-Mega-X @ Mewtwonite X  
Ability: Steadfast  
EVs: 252 Atk / 4 SpA / 252 Spe  
Jolly Nature  
- Bulk Up  
- Low Kick  
- Zen Headbutt  
- Ice Beam  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
Shiny: Yes  
EVs: 252 Atk / 92 SpD / 164 Spe  
- Fire Punch  
- Stone Edge  
- Precipice Blades  
- Swords Dance  

Yveltal @ Choice Scarf  
Ability: Dark Aura  
EVs: 4 Atk / 252 SpA / 252 Spe  
Modest Nature  
- Dark Pulse  
- Oblivion Wing  
- Foul Play  
- U-turn  

Arceus-Poison @ Toxic Plate  
Ability: Multitype  
Shiny: Yes  
EVs: 252 HP / 4 SpA / 252 Spe  
Timid Nature  
- Calm Mind  
- Sludge Bomb  
- Recover  
- Earth Power  

Giratina-Origin @ Griseous Orb  
Ability: Levitate  
EVs: 252 Def / 252 SpA / 4 SpD  
Modest Nature  
IVs: 0 Atk  
- Defog  
- Toxic  
- Hex  
- Dragon Pulse  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 244 HP / 12 Def / 252 SpD  
Careful Nature  
- Sunsteel Strike  
- Earthquake  
- Moonlight  
- Stealth Rock