Good build for Shadow Mewtwo?

General Discussion Questions
1

I just got done with a 6432 SR shiny hunt of shadow mewtwo, what is the best build for it?? Its bashful nature

2

Neutral nature. Still works out. I’ve got two set for you: Physical or Special attacker.

Mewtwo-Shadow @ Life Orb / Choice Specs
Ability: Intimidate
EVs: 4 Def / 252 SpA / 252 Spe
Bashfull Nature
-Dark Pulse / Dark Nova
-Psystrike / Dark Nova
-Ice Beam
-Fire Blast

Mewtwo @ Mewtwonite X
Ability: Intimidate
EVs: 4 Def / 252 SpA / 252 Spe
Bashfull Nature
-Night Slash / Dark Nova
-Zen Headbutt / Dark Nova
-Earthquake
-Fire Punch

Dark Nova can be activated only during Synergy Burst, and only once per synergy. However, it does damage comparable to a Dynamax move and works like Photon Geyser.

3

How do i make my mewtwo go into synergy??

4

here