Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Pressure  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Psystrike  
- Focus Blast  
- Ice Beam  

Tapu Lele @ Terrain Extender  
Ability: Psychic Surge  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psyshock  
- Moonblast  
- Nature's Madness  
- Taunt  

Calyrex-Shadow @ Choice Scarf  
Ability: As One (Spectrier)  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Astral Barrage  
- Expanding Force  
- Draining Kiss  
- Trick  

Necrozma-Dusk-Mane @ Ultranecrozium Z  
Ability: Prism Armor  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Dragon Dance  
- Photon Geyser  
- Earthquake  
- Stone Edge  

Groudon @ Red Orb  
Ability: Drought  
EVs: 252 HP / 80 Atk / 36 Def / 8 SpD / 132 Spe  
Adamant Nature  
- Stealth Rock  
- Swords Dance  
- Precipice Blades  
- Rock Tomb  

Yveltal @ Life Orb  
Ability: Dark Aura  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Dark Pulse  
- Oblivion Wing  
- Heat Wave  
- Taunt