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  
- Volt Switch / Spikes / Body Press / Teleport

Mew @ Life Orb / Leftovers / Toxic Orb  
Ability: Magic Guard / Magic Bounce
EVs: 252 HP / 252 Def / 4 SpA  
Bold Nature  
IVs: 0 Atk / 31 Spe  
- Cosmic Power  
- Soft-Boiled 
- Body Press  
- Psychic / Stored Power

Mew @ Leftovers  
Ability: Magic Bounce  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Psychic / Knock Off 
- Spikes  
- Teleport  
- Roost