Question

Do Z-Moves bypass substitute?

Comments

i think infiltrator ability allows you to bypass substitute with almost any move, but don't quote me if i'm wrong. Otherwise, z-moves will hit the substitute, not the Pokemon.

Answer 1

Z-attacks don't. Z-status moves can only bypass substitutes if the status move they were based on does so.
source

Answer 2

Of course they don't. Substitute acts as an dummy to take hits from a certain Pokemon, and after taking however much damage to summon a Substitute, it will vanish and the actual Pokemon takes no damage. The only thing that Z-moves can break through is protective moves like Protect and Spiky Shield.