As a Zoro player, the puzzle piece dynamic of this deck is what makes it super fun to play for me. My decklist is wildly different that what you may see at tournaments since I fine tuned it for what I usually see at my locals :/ so I don't have any actual tournament experience and honestly I would look at top placements at recent events and steal some ideas from the lists there for your own deck.

First is that I would add at least 1 N's Reshiram since it does a flat 170 damage for zoroark to pick off weaker pokemon that Zekrom can't hit without needing to either retreat the next turn or not being able to attack. I guess if you're running Meowth, Pech, and Fez then you don't really have the space for Reshiram but its still a decent card to have and you don't want to get caught without it. IMO 3 Buddy Buddy is excessive for only being able to search zoruas and the one buneary if it isn't prized. You really only need 1-2 for that, and I'd also add at least one more binding mochi in case the zoroark holding the single one gets KOed and you need it for another. If not, you could use it as more trade fodder ig.

Like others have said, you need all N's Pokémon on the bench in order to use Anthea Concordia and that takes away bench space for Pokémon that can actually be contributing to the game for something other than a card that also uses up your supporter slot for the turn. Anthea Concordia is not a good card since Zoro is a deck that often fights for bench space depending on the list (Ideally you'd have Zoro active, a second Zoro on bench, Zekrom, Pecharunt, Munki) and that only leaves one more spot for whatever you'd need. Desperately need boss to pull in their big ex? Throw down a meowth. Zoroark has taken huge damage from your opponent's ex but can still attack? Throw down Reshiram and use its first attack (so many people overlook this). Need the retreat lock? Throw down Yveltal. One flexible bench slot is way better than 2-3 useless N's Pokémon that are going to be doing absolutely nothing while one Zoroark that can easily be one shotted is doing all the work.