If there is one in there, you have to take it. It's not optional at that point.Do I have to take an energy card when I use Aquapolis Furret's poke power?
yesAlso if I play Mary's impulse and draw all of my cards can I then use scavenger hunt to put 2 non-nrg cards into my now empty deck.
No. Once you have finished using the effect of a Trainer, you've finished. It won't "kick back in" at a later time.If so would I have to draw them right back if I had flipped more heads than the amount of cards in my deck would allow me to draw previously.
PokePop said:Read the latest rulings.
As long as it is theoretically possible, in a game-wide sense, it's legal.
Searching for Mewtwo's evolution is still illegal because no such card exists.