Nihilego @ Choice Specs  
Ability: Beast Boost  
EVs: 92 Def / 164 SpA / 252 Spe  
Timid Nature  
- Sludge Wave  
- Power Gem  
- Dazzling Gleam  
- Grass Knot  

Aegislash @ Air Balloon  
Ability: Stance Change  
EVs: 248 HP / 52 Def / 152 SpA / 12 SpD / 44 Spe  
Modest Nature  
IVs: 0 Spe  
- Shadow Ball  
- Shadow Sneak  
- King's Shield  
- Flash Cannon  

Whimsicott @ Occa Berry  
Ability: Prankster  
EVs: 240 HP / 100 Def / 168 SpD  
Careful Nature  
- Leech Seed  
- Substitute  
- Protect  
- Taunt