If my opponent has no cards in their hand, and I only have 1 Colress in my hand, and neither player has any Benched Pokemon, am I allowed to play Colress or not?
Yes, you can. You would shuffle your "hand of zero cards" into your deck and draw nothing.
Source: TPCi Rules Team (2013-03-07)
If a Pokemon has a poison condition that places more than one damage counter per turn, like from Crobat's "Ultra-Toxic Fang" attack, does Virbank City Gym work or not?
Yes, it works. You place 4 damage counters for Crobat's "Ultra-Toxic Fang", then you place 2 more for Virbank City Gym making a total of 6 counters placed.
Source: TPCi Rules Team (2013-02-28)
If the Defending Pokemon is already Asleep & Poisoned with a condition that places more than one damage counter in between turns, can you use Hypnotoxic Laser to change the number of counters to be placed?
Yes, the new single-counter Poison condition replaces the multi-counter Poison condition.
Source: TPCi Rules Team (2013-02-21)
If my Active Pokemon is Snorlax with the "Block" Ability, what happens to my opponent's Active Pokemon if I play Escape Rope?
Escape Rope causes the Pokemon to switch, but Block only prevents Retreating. The opponent switches their Active Pokemon when Escape Rope is played.
Source: Plasma Storm FAQ (2013-02-07), TPCi Rules Team (2013-02-07)
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)