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

Ferrothorn @ Leftovers  
Ability: Iron Barbs  
EVs: 252 HP / 4 Def / 252 SpD  
Sassy Nature  
- Knock Off  
- Protect  
- Stealth Rock  
- Leech Seed  

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

Yveltal @ Life Orb  
Ability: Dark Aura  
EVs: 252 Atk / 4 SpA / 252 Spe  
Hasty Nature  
- Knock Off  
- Oblivion Wing  
- Rock Slide  
- Heat Wave  

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

Diancie @ Diancite  
Ability: Clear Body  
EVs: 100 HP / 156 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Heal Bell  
- Stealth Rock  
- Power Gem  
- Earth Power