Yveltal @ Life Orb  
Ability: Dark Aura  
EVs: 188 SpA / 68 SpD / 252 Spe  
Timid Nature  
- Taunt  
- Oblivion Wing  
- Dark Pulse  
- Sucker Punch  

Shuckle @ Mental Herb  
Ability: Sturdy  
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Sticky Web  
- Stealth Rock  
- Encore  
- Final Gambit  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 72 Def / 252 SpA / 184 Spe  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Moonblast  
- Rest  
- Sleep Talk  

Regieleki @ Heavy-Duty Boots  
Ability: Transistor  
EVs: 28 Def / 252 SpA / 228 Spe  
Modest Nature  
IVs: 0 Atk  
- Thunderbolt  
- Thunder Wave  
- Rapid Spin  
- Volt Switch  

Groudon @ Life Orb  
Ability: Drought  
EVs: 248 Atk / 88 SpA / 20 SpD / 152 Spe  
Adamant Nature  
- Fire Blast  
- Precipice Blades  
- Stone Edge  
- Rock Polish  

Eternatus @ Power Herb  
Ability: Pressure  
EVs: 252 SpA / 40 SpD / 216 Spe  
Modest Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Recover  
- Flamethrower  
- Meteor Beam