Now I'm fairly new to playing the card game, so this might be a stupid question. My friends and I don't play competitive, so our decks include cards from many sets. Leaving us with many questions from time to time.
On the Dragonite from Sunday and Moon base set, it's first attack is Dragon Wave for one grass and one electric. If you have a double dragon energy attached instead of basic energy, is it discarded after the attack? Even though it isn't technically a grass or electric energy?