- If I have Florges with "Calming Aroma" in play my attacks cost one Fairy Energy less. So I think I can use Zygarde's "Core Enforcer" attack without a Fairy energy attached, but what about the part of the attack that says to discard one Dark and one Fairy energy from this Pokemon?
- You do as much of the attack text as you can, which in your situation means simply discarding one Dark energy.
Source:
TPCi Rules Team (2017-09-21)