If my opponent's Active Pokemon is Snorlax with the "Block" Ability, what happens to my Active Pokemon if I play Scramble Switch?
Scramble Switch causes your Pokemon to switch, but Block only prevents Retreating. You can switch your Active Pokemon when Scramble Switch is played.
Source: Plasma Storm FAQ (2013-02-07), TPCi Rules Team (2013-02-07)
Can I use Junk Arm, discarding something + 1 Item card to get that 1 Item card back into my hand?
No, you cannot return cards to your hand that you used to pay this card's cost.
Source: PUI Rules Team (2011-11-03), TPCi Rules Team (2013-02-07)
Can I use Dowsing Machine, discarding something + 1 Item card to get that 1 Item card back into my hand?
No, you cannot return cards to your hand that you used to pay this card's cost.
Source: Plasma Storm FAQ (2013-02-07), TPCi Rules Team (2013-02-07)
If I have 6 cards in my hand including a Hugh, and my opponent has 5 cards, can I play Hugh or not?
No, you cannot. After playing Hugh both players would have exactly 5 cards in their hands, and you cannot play a Trainer card for no effect.
Source: TPCi Rules Team (2013-01-03)
If Crystal Wall is attached to Black Kyurem-EX, can anything raise its maximum HP beyond 300 (ike if it were somehow made Colorless and Aspertia City Gym is in play)?
Crystal Wall essentially replaces Black Kyurem-EX's printed HP with 300, and anything to add or reduce HP would work accordingly.
Source: Boundaries Crossed FAQ (2012-11-08), TPCi Rules Team (2012-11-08)
Since Skyla says "Search your deck for a Trainer card", does this allow me to search for any kind of Trainer including Supporters, and Stadiums?
Yes, it does. The current definition of "Trainers" includes Items, Supporters, and Staduims.
Source: Boundaries Crossed FAQ (2012-11-08), TPCi Rules Team (2012-11-08)
If I use Random Receiver and the very first card revealed is a Supporter, do I still have to shuffle my deck?
Yes, you must shuffle your deck regardless of how many cards were revealed for Random Receiver.
Source: TPCi Rules Team (2012-09-13)
If I use Quick Ball and the very first card revealed is a Pokemon, do I still have to shuffle my deck?
Yes, you must shuffle your deck regardless of how many cards were revealed for Quick Ball.
Source: PUI Rules Team (2007-10-25), TPCi Rules Team (2012-09-013)
Can I use two Devolution Sprays on the same Pokemon in the same turn, to devolve from a Stage 2 to Stage 1 and then to Basic?
Yes, you can.
Source: Dragons Exalted FAQ (2012-08-23), TPCi Rules Team (2012-08-23)