Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Insomnia  
EVs: 40 Def / 216 SpA / 252 Spe  
Timid Nature  
- Psystrike  
- Ice Beam  
- Fire Blast  
- Calm Mind  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 168 Def / 252 SpA / 88 Spe  
Modest Nature  
- Geomancy  
- Moonblast  
- Thunder  
- Focus Blast  

Arceus-Dark @ Dread Plate  
Ability: Multitype  
EVs: 252 HP / 160 Def / 96 Spe  
Timid Nature  
IVs: 0 Atk  
- Judgment  
- Recover  
- Refresh  
- Defog  

Zygarde @ Leftovers  
Ability: Power Construct  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
- Rest  
- Coil  
- Thousand Arrows  
- Glare  

Ho-Oh @ Choice Band  
Ability: Regenerator  
EVs: 4 HP / 252 Atk / 252 Spe  
Adamant Nature  
- Sacred Fire  
- Brave Bird  
- Earthquake  
- Toxic  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 136 HP / 168 Atk / 52 SpD / 152 Spe  
Adamant Nature  
- Stealth Rock  
- Stone Edge  
- Precipice Blades  
- Toxic