When using Tapu Koko GX's "Aero Trail" Ability, can I choose to move zero energy cards and switch it with the Active Pokemon?
No, you may not. It says if you do move energy, and moving "zero energy" is not moving energy; therefore you do not get to switch Tapu Koko GX with your Active Pokemon.
Source: TPCi Rules Team (2017-07-06)
Does Machoke's "Daunting Pose" Ability prevent my opponent's Decidueye GX's "Feather Arrow" Ability from placing damage counters on my benched Pokemon?
Yes it does. Decidueye GX can still use the ability against one of your benched Pokemon, but placing any damage counters would be blocked.
Source: TPCi Rules Team (2017-06-01)
My opponent and I both have Sudowoodo with "Roadblock"Ability in play. I use Hex Maniac on my turn to shut off "Roadblock", and then I play 5 Pokemon on my Bench. My opponent plays 5 Pokemon on their Bench during their turn. At the end of my opponent's turn, Hex Maniac's effect ends, so "Roadblock" activates again. Who discards their Pokemon first? If the first player discards their Sudowoodo, would the other person need to discard a Benched Pokemon?
It's the opponent's turn, so their Roadblock goes into effect first. You would discard your Pokemon first, and then your opponent would discard theirs. Even if you chose to discard your Sudowoodo, your opponent would have to discard down to 4 Benched Pokémon because the Roadblock effects happen simultaneously.
Source: TPCi Rules Team (2017-05-25)
If Vileplume's "Allergy Panic" Ability is in effect, does Rayquaza's "Shred" attack consider a Defending Pokemon's weakness as x2 or x4?
Shred isn't affected by "any effects on the Defending Pokemon", but the term "any effects" does not include effects that alter Weakness or Resistance. So in this case the Defending Pokemon's Weakness would be x4 due to Allergy Panic.
Source: TPCi Rules Team (2013-02-28), TPCi Rules Changes Announcement (2017-05-03), TPCi Rules Changes Announcement (2017-05-18)
Altaria has a printed weakness to Lightning, but it also has the "Clear Humming" Ability which creates an effect that gives it no weakness. What happens if it is attacked by Zebstrika with the "Zap Zone" Ability which makes its attack's damage ignore effects on the defending Pokemon? When Zebstrika attacks Altaria, is the damage altered by weakness or not?
Zap Zone refers to "any effects on your opponent's Active Pokemon", but the term "any effects" does not include effects that alter Weakness or Resistance. So in this case Zebstrika's attack will NOT be increased for Weakness, due to Clear Humming.
Source: TPCi Rules Team (2016-03-24), TPCi Rules Changes Announcement (2017-05-03), TPCi Rules Changes Announcement (2017-05-18)
What happens if I try to use Chandelure's "Shady Move" Ability to move a damage counter from my Pokemon to one of my opponent's Pokemon while they have a Machoke with "Daunting Pose" Ability in play? And what happens if I try to move one of my opponent's damage counters from one Pokemon to one of their Benched Pokemon.
In both cases Shady Move would remove the damage counter from the first Pokemon, but the second Pokemon would not receive it because it is protected by Daunting Pose. If you try to move damage *to* something that blocks effects, the damage disappears; if you try to move damage *from* something that blocks effects, the damage stays there. But Daunting Pose only prevents putting damage counters ON your Benched Pokemon; it does not prevent taking damage counters OFF your Pokemon.
Source: Guardians Rising FAQ (2017-04-22), TPCi Rules Team (2017-05-04)
For Salazzle's "Hot Poison" Ability, can I choose to only Poison or only Burn the opponent's Active Pokemon? Or do I have to do them both?
No, you must either apply both Special Conditions (if you are able to), or not use the Ability.
Source: Guardians Rising FAQ (2017-04-22), TPCi Rules Team (2017-05-04)
For Chandelure's "Shady Move" Ability, am I allowed to move a damage counter from one of my Pokemon to one of my opponent's Pokemon?
Yes, you can.
Source: Guardians Rising FAQ (2017-04-22), TPCi Rules Team (2017-05-04)
If I have more than one Dhelmise in play, do I get to add 10 damage for Metal Pokemon attacks for each one of their "Steelworker" Abilities?
Yes, they will stack.
Source: Guardians Rising FAQ (2017-04-22), TPCi Rules Team (2017-05-04)