>>27931113Zygarde's signature moves are going to be in SM, and even though the Azure flute was never distributed, Arceus was anyway so it doesn't matter.
Everything else was never intended to be obtainable (like ???-Arceus) or just random items (like God Stone or Lock Capsule).
AZ's Floette not only has a unique model, but also unique stats and a signature move. If they don't make her available in SM she's going to become the most significant scrapped content in a pokémon game so far.