Groudon @ Lum Berry  
Ability: Drought  
EVs: 140 HP / 252 Atk / 116 Spe  
Adamant Nature  
- Rock Polish  
- Precipice Blades  
- Stone Edge  
- Swords Dance  

Zekrom @ Life Orb  
Ability: Teravolt  
EVs: 252 Atk / 4 SpA / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Bolt Strike  
- Scale Shot  
- Weather Ball  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 72 HP / 144 Def / 248 SpA / 44 Spe  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Moonblast  
- Psyshock  
- Aromatherapy  

Necrozma-Dusk-Mane @ Life Orb  
Ability: Prism Armor  
Shiny: Yes  
EVs: 136 HP / 252 Atk / 120 Spe  
Adamant Nature  
- Dragon Dance  
- Sunsteel Strike  
- Stone Edge  
- Earthquake  

Grimmsnarl @ Light Clay  
Ability: Prankster  
Shiny: Yes  
EVs: 252 HP / 164 Def / 92 SpD  
Impish Nature  
- Play Rough  
- Light Screen  
- Reflect  
- Taunt  

Marshadow @ Life Orb  
Ability: Technician  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Close Combat  
- Poltergeist  
- Shadow Sneak  
- Ice Punch