Great names for all and each of the New Pokémon. That said, Zygarde looks to be pretty OP with the Core Enforcer move. I mean, erasing/disabling any Abilities of opposing Pokémon that have used moves on the same turn Core Enforcer has come into play? That is surely something that has never happened before.
That said, I'm more surprised about its ability staying as Power Construct, but perhaps, now that I think of it, maybe Zygarde Complete Forme's Ability also works backwards, and triggers a possible endless loop of sorts. Like, say when Zygarde Complete Forme goes to 50% of its total health, perhaps it devolves back to Zygarde 50% Forme, but when the latter goes into low HP itself, it returns back to Zygarde Complete and restoring its HP level back into a safe zone, thereby establishing, maybe, some sort of endless loop?
If so, the endless loop may refer to the legendary
Ouroboros serpent which represents infinity and immortality, not to say, it also happens the Ouroboros has a connection with alchemy as well. It goes even further with having associations to the World Serpent Jorgunmandr, the cycle of life and death, etc, etc.