My active Arbok uses its "Gastro Acid" attack against Weezing with the "Aftermath" Ability. Then on my opponent's turn he uses Weezing's "Smogbank" attack to do 20 damage to each of my Pokemon. If I have Latias-EX with the "Bright Down" Ability on my bench, would it take damage or not?
Since Weezing has no Abilities due to Arbok's attack, it would do 20 damage to Latias-EX.
Source: TPCi Rules Team (2015-05-07)
If Banette's "Tool Concealment" ability is active, can I attach multiple Tool cards to my Pokemon?
No, you cannot.
Source: Roaring Skies FAQ (2015-05-07), TPCi Rules Team (2015-05-07)
Banette's "Tool Concealment" ability means Pokemon Tool cards simply have no effect. They are still considered as Items and Pokemon Tool cards, so "Garbotoxin" still works, "Startling Megaphone" would be able to remove them, etc.
Source: Roaring Skies FAQ (2015-05-07), TPCi Rules Team (2015-05-07)
Can I discard a Pokemon with the "Delta Evolution" Ancient Trait to evolve ANY Pokemon in play?
No, that's not how it works. You can only play the Pokemon with the Delta Evolution Ancient Trait on top of a Pokemon it can normally evolve from.
Source: Roaring Skies FAQ (2015-05-07), TPCi Rules Team (2015-05-07)
Can I use Rare Candy to evolve a Basic Pokemon into a Stage 2 Pokemon with the "Delta Evolution" Ancient Trait on my first turn or on the Basic Pokemon's first turn in play?
No, you may not.
Source: Roaring Skies FAQ (2015-05-07), TPCi Rules Team (2015-05-07)
Can I use Team Magma's Claydol's "Magma Switch" Ability to move an energy from a non Team Magma Pokemon?
Yes, you may. Only the receiving Pokemon needs to belong to Team Magma.
Source: TPCi Rules Team (2015-04-23)
How many Team Magma/Aqua Pokemon need to be in play in order to attack with Team Magma's Groudon EX or Team Aqua's Kyogre EX with the "Power Saver" ability?
Five. If there are only four or less, it can't attack. But keep in mind that it counts Team Pokemon on both sides of the play field, including itself.
Source: TPCi Rules Team (2015-04-23)
If my opponent's Active Pokemon has the "Omega Barrier" Ancient Trait, can I use Lysandre to switch one of my benched Pokemon with it?
If your opponent's Benched Pokemon has "Omega Barrier", then Lysandre's effect will be blocked. But choosing a Benched Pokemon without "Omega Barrier" will cause it to switch with the Active Pokemon because the Benched Pokemon is the target of Lysandre.
Source: TPCi Rules Team (2015-04-09)
If I attack using a Pokemon that has the "Omega Barrage" Ancient Trait, can I do things like attach an Energy or play a Trainer between attacks?
No, you would resolve all effects from the first attack and then either perform your second attack or pass. You don't get to go back into the main part of your turn again.
Source: Primal Clash FAQ (2015-02-05), TPCi Rules Team (2015-02-05)
If I only have one energy card attached to Excadrill, can I use its "Omega Barrage" to attack with "Dredge" first to attach two energy cards, then attack a second time with "Mach Claw"?
Yes, that would work.
Source: Primal Clash FAQ (2015-02-05), TPCi Rules Team (2015-02-05)