Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Insomnia  
Shiny: Yes  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psystrike  
- Focus Blast  
- Ice Beam  
- Calm Mind  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 184 HP / 28 Def / 252 SpA / 44 Spe  
Modest Nature  
- Geomancy  
- Moonblast  
- Thunder  
- Focus Blast  

Yveltal @ Leftovers  
Ability: Dark Aura  
EVs: 248 HP / 252 Def / 8 SpD  
Impish Nature  
- Foul Play  
- Roost  
- Toxic  
- Taunt  

Arceus @ Life Orb  
Ability: Multitype  
EVs: 4 HP / 252 Atk / 252 Spe  
Jolly Nature  
- Extreme Speed  
- Swords Dance  
- Shadow Claw  
- Earthquake  

Genesect @ Choice Scarf  
Ability: Download  
Shiny: Yes  
EVs: 68 HP / 248 Atk / 8 SpA / 184 Spe  
Hasty Nature  
- U-turn  
- Iron Head  
- Ice Beam  
- Blaze Kick  

Darkrai @ Focus Sash  
Ability: Bad Dreams  
Shiny: Yes  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Dark Void  
- Dark Pulse  
- Nasty Plot  
- Thunder