Can you play Darkrai GX with "Restoration" Ability from your Discard Pile if Power Plant is in play? And if so, do you do all of its effects?
Since the Discard Pile is not considered "in play", Darkrai GX can use its Restoration Ability to put it onto the Bench and attach a Darkness Energy card from the Discard Pile to it. Once all of the Ability's effects are complete, then Power Plant shuts off the Ability.
Source: TPCi Rules Team (2019-06-06)
If I have Porygon-Z with "Crazy Code", but my opponent has Honchkrow GX with "Ruler of the Night" active, which Ability takes precedence?
Even though you're using an Ability to attach the Special Energy card, Honchkrow GX's Ability prevents you from playing it from your hand.
Source: TPCi Rules Team (2019-06-06)
If Weezing has 10 HP left and is Poisoned, would it be Knocked Out before its "Detention Gas" Ability takes place?
No. Even if a Pokemon receives more damage counters from Special Conditions, Abilities, etc. than its remaining HP, that Pokemon isn't Knocked Out until "between turns" is over.
Source: TPCi Rules Team (2019-06-06)
My Active Pokemon got Knocked Out between turns because it was poisoned and Weezing now becomes the Active Pokemon; does its "Detention Gas" Ability work?
No, because you wouldn't replace your KO'd Pokemon until the between turn phase is over. When Weezing comes up, it's too late for Detention Gas at that time.
Source: TPCi Rules Team (2019-06-06)
Can a Pokemon with an attack that does damage to the opponent's Bench get through Mr. Mime's "Bench Barrier" Ability if the Attacking Pokemon has Stealthy Hood attached?
No, it does not get through. The Bench Barrier Ability is not "being done" to the Attacking Pokemon.
Source: TPCi Rules Team (2019-05-30)
Can I use Lycanroc-GX's "Bloodthirsty Eyes to target an opponent's Pokemon with Stealthy Hood attached?
Bloodthirsty Eyes can target a Benched Pokemon with Stealthy Hood attached, but its effect would be immediately blocked. However, if the Pokemon with Stealthy Hood is Active, Bloodthirsty Eyes can target a Benched Pokemon without a Stealthy Hood and the switch would take place.
Source: TPCi Rules Team (2019-05-30)
If I have Celesteela GX with "Force Canceler" Ability active, what happens if my opponent uses Venomoth GX's "Ten-Card Return GX" attack?
The damage portion gets blocked, but your opponent still gets to shuffle their hand into their deck and draw 10 cards because that part is not being done to YOUR Pokemon.
Source: Unbroken Bonds FAQ (2019-04-19), TPCi Rules Team (2019-05-09)
If I have a Memory Energy attached to an Incineroar that evolved from a Litten with the "Caturday" attack, with Persian's "Gathering of Cats" Ability are all my Incineroar's attacks now free?
No, it doesn't work like that. Memory Energy lets you USE attacks from its previous Evolutions, but it doesn't GIVE it those attacks. Therefore, Gathering of Cats would have no effect on the Incineroar.
Source: TPCi Rules Team (2019-05-09)
If I have Miltank with the "Moomoo Malt" Ability as my Active Pokemon and I use Welder to attach 2 Fire Energy cards to a Benched Pokemon, does it heal 90 or 180 damage?
Any energies attached from the hand would trigger Moomoo Malt, once for each energy card being attached. So in this case you would heal 180 damage.
Source: TPCi Rules Team (2019-05-09)
Can I use Caterpie's "Pupate" Ability or Metapod's "Emerge" Ability on the first turn of the game or the turn that the Pokemon came into play?
Yes. There is no restriction on the Ability.
Source: Unbroken Bonds FAQ (2019-04-19), TPCi Rules Team (2019-05-02)