Metagross-Mega @ Metagrossite  
Ability: Clear Body  
EVs: 184 HP / 216 Atk / 108 Spe  
Adamant Nature  
- Meteor Mash  
- Bullet Punch  
- Ice Punch  
- Agility  

Arceus @ Earth Plate  
Ability: Multitype  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Earthquake  
- Swords Dance  
- Stone Edge  
- Recover  

Yveltal @ Leftovers  
Ability: Dark Aura  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Foul Play  
- Roost  
- Taunt  
- Toxic  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 172 Def / 252 SpA / 84 Spe  
Modest Nature  
- Geomancy  
- Moonblast  
- Thunder  
- Focus Blast  

Groudon @ Red Orb  
Ability: Drought  
EVs: 180 HP / 252 SpA / 76 Spe  
Mild Nature  
- Stealth Rock  
- Precipice Blades  
- Overheat  
- Toxic  

Deoxys-Speed @ Mental Herb  
Ability: Pressure  
EVs: 248 HP / 8 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Spikes  
- Taunt  
- Stealth Rock  
- Magic Coat