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

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
Hidden Power: Ice  
EVs: 252 SpA / 100 SpD / 156 Spe  
Mild Nature  
- Rock Polish  
- Precipice Blades  
- Fire Blast  
- Stone Edge  

Arceus-Ground @ Earth Plate  
Ability: Multitype  
EVs: 252 HP / 40 Def / 24 SpD / 192 Spe  
Timid Nature  
- Judgment  
- Recover  
- Ice Beam  
- Defog  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 252 HP / 4 Def / 252 SpD  
Careful Nature  
- Stealth Rock  
- Toxic  
- Sunsteel Strike  
- Morning Sun  

Yveltal @ Darkinium Z  
Ability: Dark Aura  
EVs: 244 HP / 112 Atk / 68 SpD / 84 Spe  
Jolly Nature  
- Foul Play  
- Roost  
- Sucker Punch  
- Toxic  

Ho-Oh @ Choice Scarf  
Ability: Regenerator  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Brave Bird  
- Sacred Fire  
- Toxic  
- Defog