Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Insomnia  
EVs: 40 Def / 216 SpA / 252 Spe  
Timid Nature  
- Psystrike  
- Ice Beam  
- Fire Blast  
- Calm Mind  

Yveltal @ Darkinium Z  
Ability: Dark Aura  
EVs: 248 HP / 108 Atk / 68 SpD / 84 Spe  
Jolly Nature  
- Foul Play  
- Roost  
- Sucker Punch  
- Toxic  

Arceus-Water @ Splash Plate  
Ability: Multitype  
EVs: 252 HP / 168 Def / 88 Spe  
Timid Nature  
IVs: 0 Atk  
- Defog  
- Toxic  
- Recover  
- Ice Beam  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 252 SpA / 104 SpD / 152 Spe  
Mild Nature  
- Stealth Rock  
- Precipice Blades  
- Overheat  
- Rock Tomb  

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

Necrozma-Dusk-Mane @ Ultranecrozium Z  
Ability: Prism Armor  
EVs: 248 HP / 232 SpD / 28 Spe  
Jolly Nature  
- Swords Dance  
- Photon Geyser  
- Moonlight  
- Sunsteel Strike