Unown's "CURE" Poke-POWER should read, "Once during your turn, when you put Unown from your hand onto your Bench, you may remove all Special Conditions from your Active Pokémon." Use of this Poke-POWER is optional.
Source: TPCi Announcement (2011-04-11), PUI Rules Team (2011-05-05)
Can I use Reuniclus' "Damage Swap" ability to move all of my damage counters onto one Pokemon and then knock it out?
You can only move one damage counter at a time with Damage Swap (even though you can re-use the ability many times), so as soon as the number of damage counters on the Pokemon equals its HP, it would be KO'd immediately. In other words, you cannot move ten damage counters onto a Pokemon with only 50 HP and then knock it out.
Source: Black & White FAQ (2011-04-28), PUI Rules Team (2011-04-28)
Do I have to use Serperior's "Royal Heal" ability if I don't want to?
Royal Heal is not an optional ability. You must use this ability at some point in between turns.
Source: Black & White FAQ (2011-04-28), PUI Rules Team (2011-04-28)
If I use Smeargle's "Portrait" Poke-POWER and find "Engineer's Adjustments" in my opponent's hand, do I have to use it if I have an Energy card in my hand?
Yes, if you have an energy card and you choose Engineer's Adjustments, you have to discard the energy and draw 4 cards.
Source: PUI Rules Team (2010-12-09), PUI Rules Team (2011-03-17)
If I don't have any cards in my hand, can I use my Mr. Mime's "Trick Reveal" Poke-POWER to look at my opponent's hand?
Yes. You still have a hand, it just has no cards in it. Show your (empty) hand when your opponent shows their hand.
Source: Call of Legends FAQ (2011-02-10), PUI Rules Team (2011-02-10)
What happens if I use Smeargle's "Portrait" Poke-POWER, but I cannot satisfy the conditions of any of my opponent's Supporters?
You get to look at the opponent's hand, and that's all.
Source: PUI Rules Team (2010-12-09)
When using Smeargle's "Portrait" Poke-POWER, can I choose a Supporter that will have no effect?
You cannot pick a supporter you couldn't normally use; for example you can't choose "Twins" unless you are behind on prizes at that time, nor Aaron's Collection if you don't have anything in your Discard Pile. You would have to choose a different Supporter if one is available.
Source: PUI Rules Team (2010-12-09)
Can I use Machamp's "Fighting Tag" Poke-POWER to switch him with the Active Pokemon if the current Active has no Fighting Energy attached to it?
No, if you don't move any Fighting energy you cannot switch Machamp with the Active Pokemon.
Source: PUI Rules Team (2010-11-18)
When Yanmega tries to attack, do you evaluate the number of cards in your hand for the "Insight" Poke-BODY before or after discarding a card for Giratina Lv.X's "Invisible Tentacles" Poke-BODY?
The Insight Poke-BODY is evaluated before your attack even begins; therefore it is checked before discarding any cards for Invisible Tentacles.
Source: PUI Rules Team (2010-11-11)
If an opponent's evolved Pokemon is Knocked Out while Gengar is Active, does the "Catastrophe" Poke-BODY put all of the evolution stage cards and Basic Pokemon card in the Lost Zone, or just the highest stage Evolution card?
The evolved Pokemon and any of its pre-evolved stages and Lv.X cards go to the Lost Zone, and all attached Energy, Tools, etc. go to the Discard Pile.
Source: Triumphant FAQ (2010-11-04), PUI Rules Team (2010-11-04)