Meloetta @ Leftovers  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- King's Shield  
- Volt Switch  
- Recover  
- Aromatherapy  

Mewtwo-Mega-X @ Safety Goggles  
Ability: Pure Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Jolly Nature  
- Drain Punch  
- Photon Geyser  
- Sacred Fire  
- Thousand Arrows  

Mewtwo-Mega-Y @ Spooky Plate  
Ability: Protean  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- King's Shield  
- Quiver Dance  
- Photon Geyser  
- Judgment  

Giratina @ Griseous Orb  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Defog  
- Recover  
- U-turn  
- Curse  

Groudon-Primal @ Earth Plate  
Ability: Mold Breaker  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naughty Nature  
- Shell Smash  
- V-create  
- Judgment  
- Bolt Strike  

Sableye-Mega @ Safety Goggles  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
- Stealth Rock  
- Shore Up  
- King's Shield  
- Spectral Thief