Xerneas @ Leftovers  
Ability: Speed Boost  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Moonblast  
- Tail Glow  
- Spikes  
- Baneful Bunker  

Arceus-Ghost @ Spooky Plate  
Ability: Multitype  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Judgment  
- Tail Glow  
- Toxic Spikes  
- Roost  

Swampert-Mega @ Groundium Z  
Ability: Fur Coat  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Thousand Waves  
- Spectral Thief  
- Nuzzle  
- Shore Up  

Venusaur-Mega @ Black Sludge  
Ability: Flash Fire  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Anchor Shot  
- Spectral Thief  
- Entrainment  
- Recover  

Yveltal @ Rocky Helmet  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Knock Off  
- Rapid Spin  
- Haze  
- Milk Drink  

Chansey @ Toxic Orb  
Ability: Imposter  
Happiness: 0  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Calm Nature  
- Topsy-Turvy  
- Fling  
- Heal Order  
- Refresh