Gengar-Mega @ Gengarite  
Ability: Shadow Tag  
EVs: 248 HP / 8 Def / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Encore  
- Perish Song  
- Destiny Bond  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 4 Def / 252 SpA / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Moonblast  
- Thunder  
- Hidden Power [Fire]  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 200 Def / 52 SpD / 8 Spe  
Impish Nature  
- Sacred Fire  
- Toxic  
- Whirlwind  
- Defog  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 252 HP / 248 SpD / 8 Spe  
Careful Nature  
- Stealth Rock  
- Precipice Blades  
- Stone Edge  
- Dragon Tail  

Zygarde-Complete @ Leftovers  
Ability: Power Construct  
EVs: 252 HP / 208 Def / 48 Spe  
Impish Nature  
- Rest  
- Thousand Arrows  
- Glare  
- Coil  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 252 HP / 112 Def / 144 SpD  
Careful Nature  
- Toxic  
- Sunsteel Strike  
- Knock Off  
- Morning Sun