When I use Typhlosion's "Flare Destroy" attack, which player chooses the Energy card to discard from the Defending Pokemon?
The player that used the attack gets to choose which Energy cards get discarded from both the Active and Defending Pokemon.
Source: HeartGold & SoulSilver FAQ (2010-02-11), PUI Rules Team (2010-02-11)
Can I use Jynx's "Mimic" attack to shuffle my hand into my deck when my opponent has no cards in his or her hand?
Yes, but you won't draw any cards after you shuffle it in.
Source: HeartGold & SoulSilver FAQ (2010-02-11), PUI Rules Team (2010-02-11)
If my opponent uses Pichu's "Playground" attack on the first turn of the game, and I am going second, can I evolve the Pokemon I put onto my Bench with "Playground" since I did not put them in play on my turn?
It is a basic game rule that neither player can normally evolve any Pokemon on their first turn of the game, even if they are going second.
Source: PUI Rules Team (2010-02-04)
May I use Ambipom [G]'s "Tail Code" attack if my opponent only has an Active Pokemon and no Benched Pokemon?
Yes you can, although it won't move or discard the energy. There must be a Pokemon on the bench or you can't move the energy off the defending Pokemon.
Source: PUI Rules Team (2010-01-28)
If I use Ambipom [G]'s "Tail Code" attack to move an energy card from the Defending Pokemon to one of my opponent's Pokemon that has an Unown-G attached to it, what happens?
While Unown-G prevents the attachment of the energy to the protected Pokemon, it does not prevent the removal of the energy card from the Defending Pokemon. The energy card is discarded.
Source: PUI Rules Team (2010-01-14)
If the Defending Pokemon is Knocked Out by Dialga-G Lv.X's "Remove Lost" attack, is a coin still flipped to see if the Energy attached to the Defending Pokemon will be sent to the Lost Zone?
Yes, you calculate the damage dealt first, then flip for the energies to go to the Lost Zone, and finally remove any Pokemon that are knocked out.
Source: PUI Rules Team (2009-04-02)
If I have no hand, can I use Sableye's "Impersonate" attack to get & discard a Bebe's Search? I can't use the effect of Bebe's Search because I can't put a card on top of the deck before I search, Does this also mean that I can't select Bebe's Search to begin with?
You can use Impersonate to search for the card, discard it, then shuffle your deck. But since you don't meet the requirements for using Bebe's Search you cannot use its effect.
Source: PUI Rules Team (2009-04-02)
If Gengar uses "Shadow Room" against a Lv.X Pokemon that has no Poke-POWER, but the card underneath the Lv.X *does* have a Poke-POWER, does "Shadow Room" place three or six damage counters?
The Lv.X Pokemon has the Poke-POWERs and Poke-BODYs from the card underneath it, so Shadow Room would place six damage counters in this situation.
Source: PUI Rules Team (2008-11-20)
Can I use dice or cards to indicate my throw in Rock-Paper-Scissors?
You may not use dice to indicate your choice, as it is too easy to manipulate the dice while it is covered. The requirements for R-P-S cards are that they must have identical backs, that they clearly say "Rock" or "Paper" or "Scissors" on the front and that all themes on the cards be appropriate for a Pokemon Event as determined by the Head Judge.
Source: PUI Rules Team (2008-10-16)
Is it OK to roll a dice to randomize my Rock-Paper-Scissors choice?
No. R-P-S is a game of strategy. You must not appear to be randomizing your choice by any method.
Source: PUI Rules Team (2008-10-16)