Mew @ Choice Scarf
Ability: Regenerator
EVs: 248 HP / 104 Def / 156 Spe
Impish / Bold Nature
- U-turn / Flip Turn / Volt Switch 
- Will-O-Wisp / Spikes
- Trick
- Psychic / Gunk Shot / Ice Beam

Mew @ Leftovers / Heavy-Duty Boots
Ability: Dauntless Shield / Magic Bounce
EVs: 252 HP / 252 Def / 4 Spe
IVs: 0 Atk
Bold Nature
- Ice Beam / Body Press / Gunk Shot
- Will-O-Wisp / Defog / Spikes 
- Roost
- Volt Switch / Teleport 

Mew @ Leftovers / Life Orb
Ability: Magic Bounce / Magic Guard
EVs: 252 HP / 252 Def / 4 Spe
IVs: 0 Atk
Bold Nature
- Calm Mind / Cosmic Power
- Roost
- Stored Power / Psychic
- Body Press

Mew @ Leftovers  
Ability: Unaware
EVs: 252 HP / 252 Def / 4 Spe 
Bold Nature  
IVs: 0 Atk  
- Roost  
- Foul Play
- Heal Bell 
- Will-O-Wisp