Mew @ Leftovers / Rocky Helmet / Colbur Berry   
Ability: Dauntless Shield  
EVs: 248 HP / 252 Def / 8 Spe  
Bold Nature  
IVs: 0 Atk  
- Ice Beam 
- Will-O-Wisp  
- Soft-Boiled  
- Spikes / Body Press / Volt Switch / Teleport

Mew @ Heavy-Duty Boots / Leftovers  
Ability: Unaware  
EVs: 252 HP / 252 Def / 4 SpA  
Relaxed / Bold Nature  
IVs: 0 / 31 Spe  
- Knock Off  
- Volt Switch / Teleport 
- Soft-Boiled  
- Spikes