Can I play Target Whistle and choose a Basic Pokemon in the Discard Pile with the Omega Barrier Ancient Trait, or does Omega Barrier block the Target Whistle?
Yes, you can put that Pokemon from the Discard Pile onto the Bench. Ancient Traits are only active when that Pokemon is in play.
Source: TPCi Rules Team (2017-03-30)
If Magearna EX with the "Mystic Heart" Ability is in play, are all Pokemon with Metal Energy attached protected from Greninja's "Shadow Stitching" attack?
If Magearna EX has a Metal Energy attached to it, all Pokemon with Metal Energy attached are protected; however, if Magearna EX does not have a Metal Energy attached to it, its Mystic Heart Ability is shut off and no Pokemon with Metal Energy attached are protected.
Source: TPCi Rules Team (2017-02-02)
When you use Tsareena's "Queenly Majesty" Ability, when the opponent reveals their hand do you get to choose which card to discard or is it random?
You get to choose.
Source: Sun & Moon FAQ (2017-02-02), TPCi Rules Team (2017-02-02)
If I have multiple Gumshoos GX in play, can I use each of their "Search the Premises" Abilities or am I limited to only one total per turn?
Each Gumshoos GX can use its own ability once per turn. So if you have two of them you can use the first Search the Premises to have your opponent reveal their hand, then use a Trainer card such as N to have the opponent shuffle their hand into their deck and draw new cards, and then use the second Search the Premises to have your opponent reveal their hand again.
Source: Sun & Moon FAQ (2017-02-02), TPCi Rules Team (2017-02-02)
Due to an error in the card text for Electrode's "Buzzap Thunder" Ability, the text on this card will be changed. The original text for this Ability says, "Once during your turn (before your attack), you may Knock Out this Pokémon and attach it to one of your Lightning-type Pokémon as a Special Energy card. This card provides 2 Lightning Energy only while this card is attached to a Lightning-type Pokémon." The original intention of this Ability was for Electrode to provide 2 Lightning Energy as long as it's attached to any Pokémon, not just a Lightning-type Pokémon. The new text will say, "Once during your turn (before your attack), you may Knock Out this Pokémon and attach it to one of your Lightning-type Pokémon as a Special Energy card. This card provides 2 Lightning Energy only while this card is attached to a Pokémon." Effective immediately, Electrode's Buzzap Thunder Ability will use this updated text instead of the original text.
Source: Organized Play News (2017-01-19)
If my Yveltal with "Fright Night" Ability gets KO'd, am I then able to use Exp.Share on one of my Benched Pokemon to recover one of Yveltal's Basic Energy cards?
Sorry, but no. Fright Night would still be working so Exp.Share would not enable before Yveltal hits the Discard Pile.
Source: TPCi Rules Team (2017-01-05)
Can I use Starmie's "Space Beacon" Ability to discard a card from my hand if there are no Basic Energies in my Discard Pile?
Yes you can. The first part of Space Beacon is to discard a card from your hand, period. Then you do as much of the rest of the Ability as you are able to.
Source: TPCi Rules Team (2017-01-05)
If I used Volcanion EX's "Volcanic Heat" attack last turn, then on this turn I play Marowak and use its "Bodyguard" ability that says to "remove any existing effects", does that mean I can use Volcanion EX's "Volcanic Heat" attack on this turn?
Sorry, but no. You can only remove effects that were done by your opponent's Pokemon, not effects done by your own Pokemon.
Source: TPCi Rules Team (2016-12-08)
Can I use Arcanine's "Burning Road" Ability any time during my turn, or do I have to use it the moment Arcanine becomes Active?
As soon as Arcanine goes from the Bench to become Active you must choose immediately whether you're going to use Burning Road or not; you cannot delay the action until later in the turn. If you choose not to use Burning Road at that time, you could use it later if Arcanine somehow goes back to the Bench and becomes Active again. Also, if you use an attack like Growlithe's "Hind Kick" and Arcanine becomes Active, you could use Burning Road if you haven't already used it that turn.
Source: Evolutions FAQ (2016-11-03), TPCi Rules Team (2016-11-03)
When I use Imakuni?'s Doduo's "Frenzied Escape" Pokemon Power, can I put the card into a top-loader to prevent it from getting damaged when I throw it?
No, that would cause a "marked card" situation and is not allowed. Besides, you could really hurt someone flinging a top-loader like that (shame, shame)!
Source: Evolutions FAQ (2016-11-03), TPCi Rules Team (2016-11-03)