Mewtwo-Mega-X @ Toxic Orb  
Ability: Poison Heal  
Tera Type: Psychic  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Low Kick  
- Will-O-Wisp  
- Stealth Rock  
- Knock Off  

Ho-Oh (M) @ Ghostium Z  
Ability: Magic Bounce  
Tera Type: Fire  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Knock Off  
- Spectral Thief  
- Heal Order  
- Anchor Shot  

Diancie-Mega @ Pixie Plate  
Ability: Pixilate  
Tera Type: Rock  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Hasty Nature  
- Boomburst  
- Spikes  
- Precipice Blades  
- Extreme Speed  

Chansey @ Eviolite  
Ability: Imposter  
Happiness: 55  
Tera Type: Normal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Shore Up  
- Anchor Shot  
- Haze  
- Defog  

Aegislash @ Leftovers  
Ability: Prankster  
Tera Type: Steel  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Destiny Bond  
- U-turn  
- Shore Up  
- Encore  

Xerneas @ Toxic Orb  
Ability: Poison Heal  
Shiny: Yes  
Tera Type: Fairy  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
- Quiver Dance  
- Moonblast  
- Rapid Spin  
- Lava Plume