Hydreigon @ Choice Scarf  
Ability: Levitate  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- U-turn  
- Dark Pulse  
- Draco Meteor  
- Fire Blast  

Aegislash @ Choice Specs  
Ability: Stance Change  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
- Shadow Ball  
- Flash Cannon  
- Shadow Sneak  
- Steel Beam  

Mamoswine @ Heavy-Duty Boots  
Ability: Thick Fat  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Knock Off  
- Icicle Crash  
- Ice Shard  
- Earthquake  

Diancie @ Leftovers  
Ability: Clear Body  
EVs: 248 HP / 32 Atk / 228 SpD  
Sassy Nature  
- Moonblast  
- Diamond Storm  
- Mystical Fire  
- Stealth Rock  

Crobat @ Heavy-Duty Boots  
Ability: Infiltrator  
EVs: 248 HP / 96 Def / 28 SpD / 136 Spe  
Jolly Nature  
- U-turn  
- Roost  
- Defog  
- Toxic  

Tangrowth @ Assault Vest  
Ability: Regenerator  
EVs: 232 HP / 8 Def / 252 SpD / 16 Spe  
Sassy Nature  
- Giga Drain  
- Knock Off  
- Sludge Bomb  
- Earthquake