Gengar-Mega @ Gengarite  
Ability: Shadow Tag  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shadow Ball  
- Focus Blast  
- Icy Wind  
- Sludge Wave  

Yveltal @ Choice Specs  
Ability: Dark Aura  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- U-turn  
- Oblivion Wing  
- Dark Pulse  
- Heat Wave  

Skarmory @ Leftovers  
Ability: Sturdy  
EVs: 252 HP / 232 Def / 24 Spe  
Bold Nature  
IVs: 0 Atk  
- Whirlwind  
- Spikes  
- Toxic  
- Roost  

Chansey @ Eviolite  
Ability: Natural Cure  
EVs: 248 HP / 120 Def / 140 SpD  
Bold Nature  
IVs: 0 Atk  
- Stealth Rock  
- Heal Bell  
- Soft-Boiled  
- Confide  

Muk-Alola @ Assault Vest  
Ability: Poison Touch  
EVs: 252 HP / 88 Atk / 168 SpD  
Adamant Nature  
- Knock Off  
- Pursuit  
- Shadow Sneak  
- Poison Jab  

Mantine @ Leftovers  
Ability: Water Absorb  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Toxic  
- Defog  
- Roost  
- Scald