TOWER OF POWER (Arceus-Psychic) @ Light Clay  
Ability: Prankster  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Calm Nature  
IVs: 0 Atk  
- Haze  
- Reflect  
- Light Screen  
- Recover  

Celesteela @ Rocky Helmet  
Ability: Triage  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Tail Glow  
- Oblivion Wing  
- Toxic  
- Leech Seed  

Xerneas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Relaxed Nature  
- Moonblast  
- Spectral Thief  
- Rapid Spin  
- Spiky Shield  

Giratina-Origin @ Griseous Orb  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Quiet Nature  
- Spectral Thief  
- Core Enforcer  
- Shell Smash  
- Shore Up  

Mewtwo-Mega-X @ Psychium Z  
Ability: Guts  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Psychic Fangs  
- Close Combat  
- Spikes  
- Will-O-Wisp  

Slaking @ Ghostium Z  
Ability: Soundproof  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Spectral Thief  
- Sunsteel Strike  
- Thousand Waves  
- Recover