So two interesting situations today: We have a Flygon with 2 fire energy attached and a Double Dragon Energy.
Is it possible to use Flying Beatdown's optional effect if only one DDE is attached (and hence discarded)?
Second situation: Two Double Dragon Energies are attached to flygon, how many must you discard for the optional effect on the attack?
Pokemon TCG Online seems to think Situation 1 = Yes and Situation 2 = Both energies which could be a contradiction.