Also I’m using double defog to (yes it’s very niche) because my team would otherwise be weak to hazards
-
Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Smogon Forums
Ominous Void
Pinkacross
My main concern here is Kingambit. If Kingambit has a Tera type that allows it to get past Zamazenta (which most do), you're in trouble. If Gambit isn't causing you problems in practice, don't change anything, but if it is, you may want to consider a speedier Weezing. Team looks pretty good for the most part though!
Pinkacross
My one other concern is the stall MU. There is a near 0% chance your team will break a stall. You may want to consider Fire Spin + Taunt Volcanion to help with that MU.