If Skyarrow Bridge is in play, can I still use Heavy Ball to search for a Basic Pokemon with a Retreat Cost of 3?
Yes, you can. The Retreat Cost reduction only applies to Basic Pokemon in play, and cards in your deck are not in play.
Source: Next Destinies FAQ (2012-02-09), TPCi Rules Team (2012-02-09)
If Rocky Helmet is attached to a Pokemon with an effect such as Donphan's "Exoskeleton" Poke-BODY or a Defender attached, will an attack that normally deals 20 or less damage trigger the effects of Rocky Helmet or not?
If the net effect of the attack results in zero damage done to the Defending Pokemon, Rocky Helmet does not trigger.
Source: PUI Rules Team (2011-12-15)
My opponent used a Recycle but I didn't see the card they put on top of their deck. Do they have to show it to me even though it does not say that on the card any longer?
Yes, even when it is not printed on the card, you must still clearly indicate which card you are moving because your Discard Pile is open to all players.
Source: TPCi Rules Team (2011-12-01)
Does Rare Candy override evolution-preventing effects such as Archeops' "Ancient Power" Ability?
Ancient Power does not allow you to use a Pokemon's attack or play a Trainer card to evolve your Benched or Active Pokemon, unless the Evolution card you would be putting into play comes from somewhere other than your hand. So Rare Candy cannot be used while Archeops' Ancient Power Ability is in effect.
Source: Noble Victories FAQ (2011-11-17), PUI Rules Team (2011-11-17), PUI Rules Team (2011-11-21)
If Eviolite if attached to Zekrom, would its "Bolt Strike" attack do 40 or 20 damage to itself?
Eviolite reduces any damage done to the Basic Pokemon by attacks from either player. So Bolt Strike's self-damage would also be reduced by -20.
Source: Noble Victories FAQ (2011-11-17), PUI Rules Team (2011-11-17)
Can I use Professor Elm's Training Method if there are zero cards left in my deck?
No, you cannot search through your deck if there's nothing there to search. If there are cards in the deck you can fail to find a Pokemon because you don't know what may be in a deck, but since you do know whether there are ANY cards or not you cannot search through an empty deck.
Source: PUI Rules Team (2011-09-22)
Can I have 4 copies of each Alph Lithograph card in my deck?
No, you may not. Each variant of Alph Lithograph does something different, but they all have the same card name. Just like you can have no more than 4 Pikachu in any combination, you can only have a maximum of 4 Alph Lithograph cards in your deck. When entering onto a decklist, make sure to list them on separate lines and include the set and card number on each line for clarity.
Source: PUI Rules Team (2011-09-15)
In Germany we have two different Trainer Cards with the same translation for the name. Both Energy Retrieval and Energy Returner are called "Energie - Rückgewinnung". How would this be handled in a Decklist? Can I have 4 of both?
In Japanese and English those are two different cards with completely different actions. You may have up to 4 of each in your deck, but on the decklist you should list them on separate lines and include the set and card number on each line for clarity.
Source: PUI Rules Team (2011-09-15)