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)
When I use Imakuni?'s Doduo's "Frenzied Escape" Pokemon Power, can I put it onto my bench after throwing the card?
No, you cannot; it ran away, remember??? It is out of play for the rest of the game.
Source: Evolutions FAQ (2016-11-03), TPCi Rules Team (2016-11-03)
Can I use Electrode's "Buzzap Thunder" Ability when I have no other {L} Pokemon in play?
No, you cannot.
Source: Evolutions FAQ (2016-11-03), TPCi Rules Team (2016-11-03)
Say I have an Yveltal with "Fright Night" Ability as my Active Pokemon with Bursting Balloon attached, then I play Hex Maniac. What happens at the end of my opponent's turn, when they attack and do damage to Yveltal?
Hex Maniac works until the end of your opponent's turn. At the end of your opponent's turn, you check to see if Bursting Balloon gets discarded. So Bursting Balloon places the 6 damage counters, Hex Maniac's effect wears off, and then Fright Night is reactivated preventing Bursting Balloon from being discarded.
Source: TPCi Rules Team (2016-09-08)
Talonflame's "Gale Wings" Ability says if it's in your hand when you are setting up to play, you may put it face down as your Active Pokemon. If your opening hand has no Basics but you do have Talonflame, you can choose to put it out as your Active OR show you have no basics and mulligan... YOU DECIDE.
Source: Steam Siege FAQ (2016-08-04), TPCi Rules Team (2016-08-04)
Can I use Foongus' "Play Ball" Ability to retrieve any Ultra Ball, Great Ball, Dive Ball, Repeat Ball, etc. cards from the Discard Pile?
Nope, Play Ball only works for plain old Poke Ball cards.
Source: Steam Siege FAQ (2016-08-04), TPCi Rules Team (2016-08-04)
Can I use Klefki's "Wonder Lock" Ability if Klefki doesn't have any cards attached to it?
Yes, you may.
Source: Steam Siege FAQ (2016-08-04), TPCi Rules Team (2016-08-04)