Groudon-Primal @ Red Orb  
Ability: Desolate Land  
Shiny: Yes  
EVs: 56 Atk / 252 SpA / 144 SpD / 56 Spe  
Mild Nature  
- Rock Polish  
- Fire Blast  
- Precipice Blades  
- Dragon Pulse  

Arceus @ Leftovers  
Ability: Multitype  
EVs: 200 HP / 252 Atk / 56 Spe  
Adamant Nature  
- Swords Dance  
- Magic Coat  
- Extreme Speed  
- Shadow Claw  

Xerneas @ Choice Scarf  
Ability: Fairy Aura  
Shiny: Yes  
EVs: 32 Def / 252 SpA / 224 Spe  
Modest Nature  
IVs: 0 Atk  
- Sleep Talk  
- Moonblast  
- Geomancy  

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

Latias @ Soul Dew  
Ability: Levitate  
Shiny: Yes  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Healing Wish  
- Recover  
- Draco Meteor  
- Grass Knot 

Dialga @ Shuca Berry  
Ability: Pressure  
Shiny: Yes  
EVs: 84 HP / 252 SpA / 172 Spe  
Modest Nature  
IVs: 0 Atk  
- Stealth Rock  
- Thunder Wave
- Draco Meteor  
- Flash Cannon