If my opponent has Celebi-EX with "Time Recall" in play, can I use Golduck's "Amnesia" attack to prevent the Defending Pokemon from using one of its previous evolution's attacks?
No, you can only use Amnesia on the attacks that are present on the opponent's card at the time of your attack.
Source: PUI Rules Team (2005-03-10), Boundaries Crossed FAQ (2012-11-08) Boundaries Crossed FAQ (2012-11-08)
If I have Ditto with "Transform" in play this turn, on my next turn can I put a Basic Pokemon from my hand on top of Ditto and then immediately evolve it into a Stage 1 or use Rare Candy to evolve it to Stage 2?
Yes, you can. Ditto says "Any cards attached to this Pokemon, damage counters, Special Conditions, turns in play, and any other effects remain on the new Pokemon"; so as long as Ditto has been in play for more than a turn it satisfies the evolutionary requirement, and the Basic Pokemon card placed on Ditto can be evolved or used with Rare Candy immediately.
Source: Boundaries Crossed FAQ (2012-11-08), TPCi Rules Team (2012-11-08)
If a Pokemon normally has no Retreat Cost, does Jellicent's "Stickiness" Ability give it a Retreat Cost of (*) instead?
Yes, Stickiness adds +1 to each of the opponent's Pokemon's Retreat Costs. However, if the Retreat Costs are set to zero by an effect such as Darkrai-EX's "Dark Cloak" Ability, they cannot be increased by Stickiness.
Source: Boundaries Crossed FAQ (2012-11-08), TPCi Rules Team (2012-11-08)
If I use Cresselia-EX's "Psychic Protection" attack, does Vileplume's "Allergy Panic" Ability override and give it a x4 Weakness instead?
No, since there is no longer a weakness there is nothing for Allergy Panic to multiply.
Source: Boundaries Crossed FAQ (2012-11-08), TPCi Rules Team (2012-11-08)
If a Pokemon normally has no Weakness, does Vileplume's "Allergy Panic" Ability give it a x4 Weakness instead?
No, if a Pokemon doesn't have Weakness, you cannot *apply* any Weakness multiplier to it at all.
Source: Boundaries Crossed FAQ (2012-11-08), TPCi Rules Team (2012-11-08)
If you have Flygon with "Sand Slammer" active, but the opponent has Serperior with "Royal Heal" in play, which Ability goes first? The one that places damage or the one that heals damage?
In this situation, the player whose Pokemon are being affected gets to choose the order of when the abilities take place.
Source: TPCi Rules Team (2012-11-01)
Can you use Audino's "Busybody" Ability if there is no damage and no Special Conditions on your Active Pokemon?
No, you cannot. You have to heal something in order to use Busybody.
Source: TPCi Rules Team (2012-11-01)
Does Giratina EX's "Shred" attack ignore effects such as Weakness and Resistance?
No, Weakness and Resistance are not considered effects; they are basic game mechanics and are not ignored by Shred.
Source: TPCi Rules Team (2012-10-04)
Can I use Empoleon's "Diving Draw" Ability if I have no cards left in my deck, and just discard a card from my hand?
Yes, you can. The first sentence of Diving Draw says to discard a card from your hand. Then if you can do that, you do as much of the rest of the Ability as you can, which in this case is draw no cards.
Source: TPCi Rules Team (2012-10-04)
If I use Random Receiver and the very first card revealed is a Supporter, do I still have to shuffle my deck?
Yes, you must shuffle your deck regardless of how many cards were revealed for Random Receiver.
Source: TPCi Rules Team (2012-09-13)