It's true that Switch is needed for Corners decks, but that is kind of specialized. Someone already pointed out that unless you're running something like Reshiram deck using Blue Flare a deck doesn't really need Energy Retrieval, or even the 'reverses' where Rare Candy does no good in a deck using only Basics (like a Corners or Outrage deck) or Junk Arm not being useful in a deck running Vileplume (which weirdly to me is called The Truth...why?).
I played a few games and found that I only needed to use (at most) Two Pokemon Collectors for the card effect. I guess that's the good thing about Junk Arm is that it doesn't matter what 2 you discard so it can be useless Trainers for the requirement if needed.
I played a few games and found that I only needed to use (at most) Two Pokemon Collectors for the card effect. I guess that's the good thing about Junk Arm is that it doesn't matter what 2 you discard so it can be useless Trainers for the requirement if needed.