Calyrex-Ice @ Leftovers  
Ability: As One (Glastrier)  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Glacial Lance  
- Leech Seed  
- Substitute  
- Swords Dance  

Ditto @ Choice Scarf  
Ability: Imposter  
Shiny: Yes  
EVs: 248 HP / 8 Atk / 252 Def  
Relaxed Nature  
IVs: 0 Spe  
- Transform  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 248 HP / 72 Def / 188 SpD  
Careful Nature  
- U-turn  
- Foul Play  
- Roost  
- Defog  

Necrozma-Dusk-Mane @ Rocky Helmet  
Ability: Prism Armor  
EVs: 224 HP / 252 Def / 32 Spe  
Impish Nature  
- Sunsteel Strike  
- Earthquake  
- Moonlight  
- Dragon Dance  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
EVs: 116 Atk / 140 SpD / 252 Spe  
Jolly Nature  
- Protect  
- Close Combat  
- Wild Charge  
- Behemoth Blade  

Eternatus @ Heavy-Duty Boots  
Ability: Pressure  
EVs: 164 HP / 252 SpD / 92 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Mystical Fire  
- Recover  
- Toxic