Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 248 HP / 252 SpA / 8 SpD  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Gravity  
- Moonblast  
- Dazzling Gleam  

Groudon @ Red Orb  
Ability: Drought  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Swords Dance  
- Precipice Blades  
- Fire Punch  
- Protect  

Magearna @ Fairium Z  
Ability: Soul-Heart  
EVs: 252 HP / 252 SpA / 4 SpD  
Modest Nature  
IVs: 0 Atk  
- Protect  
- Dazzling Gleam  
- Flash Cannon  
- Fleur Cannon  

Gengar-Mega @ Gengarite  
Ability: Shadow Tag  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Protect  
- Taunt  
- Sludge Bomb  
- Hidden Power [Water]  

Kyogre @ Blue Orb  
Ability: Drizzle  
EVs: 252 HP / 252 SpA / 4 SpD  
Modest Nature  
IVs: 0 Atk  
- Protect  
- Water Spout  
- Scald  
- Ice Beam  

Yveltal @ Assault Vest  
Ability: Dark Aura  
EVs: 248 HP / 252 Atk / 8 SpA  
Lonely Nature  
- Knock Off  
- Snarl  
- Oblivion Wing  
- Sucker Punch