Groudon @ Focus Sash  
Ability: Drought  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Stealth Rock  
- Rock Tomb  
- Precipice Blades  
- Roar  

Grimmsnarl (M) @ Light Clay  
Ability: Prankster  
EVs: 252 HP / 4 Atk / 252 Def  
Impish Nature  
- Reflect  
- Light Screen  
- Taunt  
- Spirit Break  

Zekrom @ Leftovers  
Ability: Teravolt  
Shiny: Yes  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Substitute  
- Dragon Dance  
- Bolt Strike  
- Dragon Claw  

Necrozma-Dusk-Mane @ Weakness Policy  
Ability: Prism Armor  
Shiny: Yes  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Sunsteel Strike  
- Earthquake  
- Morning Sun  

Xerneas @ Power Herb  
Ability: Fairy Aura  
Shiny: Yes  
EVs: 248 HP / 252 SpA / 8 SpD  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Moonblast  
- Psyshock  
- Thunder  

Calyrex-Ice @ Weakness Policy  
Ability: As One (Glastrier)  
EVs: 248 HP / 252 Atk / 8 SpD  
Brave Nature  
IVs: 0 Spe  
- Trick Room  
- Glacial Lance  
- High Horsepower  
- Swords Dance