Mewtwo-Mega-X @ Mewtwonite X  
Ability: Pressure  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Low Kick  
- Ice Punch  
- Stone Edge  
- Zen Headbutt  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 248 HP / 8 Def / 252 SpD  
Careful Nature  
- Precipice Blades  
- Stealth Rock  
- Roar  
- Fire Punch  

Lugia @ Leftovers  
Ability: Multiscale  
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Toxic  
- Roost  
- Aeroblast  
- Whirlwind  

Arceus-Water @ Splash Plate  
Ability: Multitype  
EVs: 72 Def / 64 SpA / 180 SpD / 192 Spe  
Timid Nature  
IVs: 0 Atk  
- Toxic  
- Defog  
- Recover  
- Judgment  

Marshadow @ Life Orb  
Ability: Technician  
EVs: 252 Atk / 4 SpA / 252 Spe  
Hasty Nature  
- Spectral Thief  
- Shadow Sneak  
- Hidden Power [Ice]  
- Close Combat  

Xerneas @ Fairium Z  
Ability: Fairy Aura  
EVs: 136 HP / 252 Def / 48 SpA / 72 Spe  
Bold Nature  
IVs: 0 Atk  
- Ingrain  
- Rest  
- Geomancy  
- Moonblast