For Wishiwashi's "Scatter" Ability, when does this check for damage counters happen, before "in between turns" when Poison counters are placed or afterward?
After your opponent concludes their end of turn actions including all effects of attack and cleaning up any KO, then before in between turns you check for any damage counters on Wishiwashi that would trigger Scatter to shuffle Wishiwashi and all cards attached into your deck.
Source: Cosmic Eclipse FAQ (2019-10-18), TPCi Rules Team (2019-10-31)
Using Lanturn's "Blinking Lights" Ability, may I repeatedly look at the top card of my opponent's deck, even if the deck has not changed?
Yes, as long as it does not waste time or interfere with your opponent's play.
Source: Cosmic Eclipse FAQ (2019-10-18), TPCi Rules Team (2019-10-31)
If my opponent has used Latios GX's "Clear Vision GX" attack, would my Keldeo GX be able to use its "Resolute Blade GX" attack?
Yes. The effect of Clear Vision GX is placed on each of the opponent's Pokemon, and since Keldeo GX's Pure Heart Ability prevents all effects of attacks done to it by your opponent's Pokemon GX, it is unaffected by Clear Vision GX.
Source: TPCi Rules Team (2019-09-05)
Can you use Greninja GX's "Elusive Master" Ability while Power Plant is in play?
Yes, you can. You get to put Greninja GX onto your bench AND draw three cards because Elusive Master activates while it is in your hand before it comes into play, and therefore is not blocked by Power Plant.
Source: TPCi Rules Team (2019-08-22)
Can you use the "Dedechange" Ability when you play Dedenne GX from your hand while Power Plant is in play?
No, you cannot. Dedechange does not activate until Dedenne GX is on the Bench, at which time it is considered "in play" and therefore blocked by Power Plant.
Source: TPCi Rules Team (2019-08-22)
If I evolve my Shroomish into Breloom (which has the Spore attack), can I use Amoonguss's "Bursting Spores" Ability?
Yes, because you have played a Pokemon that has the Spore attack from your hand during your turn.
Source: Unified Minds FAQ (2019-07-19), TPCi Rules Team (2019-08-01)
What happens if I use Steelix's "Gigaton Shake" attack, and then my opponent uses Mawile GX's "Captivating Wink" Ability during their turn? Would those Pokemon I put into play be able to attack on my next turn (since it was not during MY turn)?
No, they would not be able to attack.
Source: Unified Minds FAQ (2019-07-19), TPCi Rules Team (2019-08-01)
Can you use Mawile GX's "Captivating Wink" Ability if your opponent's Bench is full?
No. It's public knowledge that you can't put down any additional Basic Pokemon on your opponent's Bench, so you cannot use the Ability.
Source: Unified Minds FAQ (2019-07-19), TPCi Rules Team (2019-08-01)
Mawile GX's "Captivating Wink" Ability says to put any number of Basic Pokemon you find in your opponent's hand onto their Bench. Does this allow you to put more than 5 Pokemon on the bench?
No, Captivating Wink does not allow you to exceed the normal limits of the game. You can put any number of Basic Pokemon onto your opponent's Bench up to the maximum size of the Bench.
Source: Unified Minds FAQ (2019-07-19), TPCi Rules Team (2019-08-01)