Ditto @ Choice Scarf  
Ability: Imposter  
EVs: 252 HP / 4 Atk / 252 Def  
Relaxed Nature  
IVs: 0 Spe  
- Transform  

Palkia @ Lustrous Orb  
Ability: Pressure  
EVs: 4 HP / 252 SpA / 252 Spe  
Timid Nature  
- Spacial Rend  
- Hydro Pump  
- Thunder  
- Fire Blast  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 248 HP / 8 Def / 252 SpD  
Careful Nature  
- Roost  
- Knock Off  
- Snarl  
- Defog  

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

Zacian @ Choice Band  
Ability: Intrepid Sword  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Play Rough  
- Close Combat  
- Wild Charge  
- Crunch  

Eternatus @ Black Sludge  
Ability: Pressure  
EVs: 240 HP / 252 SpD / 16 Spe  
Timid Nature  
- Dynamax Cannon  
- Recover  
- Flamethrower  
- Toxic