Steelix-Mega @ Steelixite  
Ability: Sheer Force  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
IVs: 0 Atk  
- Fissure  
- Body Press  
- Iron Defense  
- Rest  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 248 HP / 236 SpD / 24 Spe  
Careful Nature  
- Precipice Blades  
- Thunder Wave  
- Rest  
- Sleep Talk  

Necrozma-Dusk-Mane @ Rocky Helmet  
Ability: Prism Armor  
EVs: 252 HP / 252 Def / 4 Spe  
Impish Nature  
- Sunsteel Strike  
- Knock Off  
- Stealth Rock  
- Morning Sun  

Arceus-Dark @ Dread Plate  
Ability: Multitype  
EVs: 248 HP / 172 SpD / 88 Spe  
Calm Nature  
IVs: 0 Atk  
- Judgment  
- Whirlpool  
- Perish Song  
- Recover  

Zygarde @ Chesto Berry  
Ability: Power Construct  
EVs: 208 HP / 252 Def / 48 Spe  
Impish Nature  
- Thousand Arrows  
- Glare  
- Haze  
- Rest  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Swords Dance  
- Behemoth Blade  
- Assurance  
- Wild Charge