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

Ferrothorn @ Leftovers  
Ability: Iron Barbs  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
- Spikes  
- Leech Seed  
- Body Press  
- Knock Off  

Yveltal @ Choice Band  
Ability: Dark Aura  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Knock Off  
- Dual Wingbeat  
- U-turn  
- Sucker Punch  

Tyranitar @ Heavy-Duty Boots  
Ability: Sand Stream  
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Roar  
- Stealth Rock  
- Thunder Wave  
- Foul Play  

Zygarde @ Leftovers  
Ability: Power Construct  
EVs: 252 HP / 252 Atk / 4 SpD  
Adamant Nature  
- Coil  
- Thousand Waves  
- Rest  
- Scale Shot  

Necrozma-Dusk-Mane @ Life Orb  
Ability: Prism Armor  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Photon Geyser  
- Earthquake  
- Sunsteel Strike