Klefki @ Focus Sash  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 4 SpD  
Adamant Nature  
- Fairy Lock  
- Play Rough  
- Spikes  
- Magic Coat  

Marshadow @ Life Orb  
Ability: Technician  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Bulk Up  
- Spectral Thief  
- Close Combat  
- Shadow Sneak  

Groudon @ Lum Berry  
Ability: Drought  
EVs: 100 HP / 252 Atk / 156 Spe  
Adamant Nature  
- Swords Dance  
- Precipice Blades  
- Stone Edge  
- Rock Polish  

Necrozma-Dusk-Mane @ Weakness Policy  
Ability: Prism Armor  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Dragon Dance  
- Sunsteel Strike  
- Stone Edge  
- Earthquake  

Yveltal @ Black Glasses  
Ability: Dark Aura  
EVs: 252 Atk / 4 SpA / 252 Spe  
Hasty Nature  
- Knock Off  
- Oblivion Wing  
- Taunt  
- Sucker Punch  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 48 HP / 120 Def / 252 SpA / 88 Spe  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Moonblast  
- Thunder  
- Substitute