When Dimension Valley is in play, if Mew EX uses its "Versatile" Ability to copy an attack from another Pokemon, will the attack's Energy cost be reduced by (C)?
Yes.
Source: TPCi Rules Team (2014-11-13)
Can you play Professor Juniper or Fiery Torch, or any draw Trainer, with no cards in your deck?
No, you cannot play a Trainer when it is known that it will have no effect.
Source: TPCi Rules Team (2014-11-13)
Is the damage bonus from Fighting Stadium applied to all Defending Pokemon-EX, or only the opponent's Active Pokemon-EX?
It will apply only to an opponent's Active Pokemon-EX, not to any Benched Pokemon-EX.
Source: TPCi Rules Team (2014-11-13)
If I play Lysandre's Trump Card and I have a Lysandre's Trump Card from a previous turn in the Discard pile does that card get shuffled back into my deck?
No, the wording on Lysandre's Trump Card that says "except for Lysandre's Trump Card" is referring to all Lysandre's Trump Cards in the Discard pile.
Source: Phantom Forces FAQ (2014-11-13), TPCi Rules Team (2014-11-13)
I am playing a Robo Substitute from my hand to my Bench, but my opponent used Venomoth's "Dizzying Wind" attack last turn. Do I have to flip to play it?
Yes, Robo Substitute is a Trainer card when it is played.
Source: Phantom Forces FAQ (2014-11-13), TPCi Rules Team (2014-11-13)
Can you use Target Whistle on an opponent's discarded Robo Substitute?
Target Whistle says that it can bring back a Basic Pokemon card, but the Robo Substitute in the discard pile is a Trainer card, not a Basic Pokemon.
Source: Phantom Forces FAQ (2014-11-13), TPCi Rules Team (2014-11-13)
What's the proper way to play a Trainer like Ultra Ball?
When playing a Trainer you first put it onto the playing field (not directly into the Discard Pile). Then you do what the card says, such as discarding two cards (those go into the Discard Pile right away), searching your Deck, showing the selected Pokemon to your opponent before putting it directly into your hand, shuffling your Deck, etc. Finally, after everything is done, put the Trainer card into the Discard Pile.
Source: TPCi Rules Team (2014-09-18)
In Unlimited, can I use Korrina to get old Trainer cards like Professor Oak, Item Finder, etc.?
Yes. If a card is not a Supporter or a Stadium card, it would be considered an Item card by a new card effect.
Source: TPCi Rules Team (2014-09-04)
If the Pokemon that Focus Sash is attached to is attacked with an attack such as Cobalion EX's "Steel Bullet" that ignores effects on the Defending Pokemon, is it Knocked Out?
No. The full damage would be done first, and then afterwards the effect of Focus Sash would reduce the damage counters to leave 10 HP remaining.
Source: Furious Fists FAQ (2014-08-28), TPCi Rules Team (2014-08-28)
If Eevee only has 10 HP left and Frozen City is in play, would it be KO'd before I have a chance to use its "Energy Evolution" ability by attaching a Basic Energy?
No, it would not. All triggered effects have to be resolved before checking for KO's, so you would take the +10 damage for Frozen City first, then use Energy Evolution to search your deck. Of course, if you fail the search and Eevee's damage is greater than or equal to its HP, then Eevee is KO'd.
Source: TPCi Rules Team (2014-08-28)