When I use Shaymin's "Celebration Wind" Poke-POWER, can I move my energy cards in play around to any and all of my Pokemon that I want, or just to one Pokemon?
You can move the energy cards from more than one Pokemon and move them to more than one Pokemon, as desired. However, once you have taken another action, like playing a Pokemon card onto your bench, attaching an energy card from your hand, retreating your Active Pokemon, etc. you can no longer move any energy cards around.
Source: Unleashed FAQ (2010-05-13), PUI Rules Team (2010-05-13)
If I have multiple Cherrim in play, can I use more than one "Sunny Heal" Poke-POWER?
Yes, you can.
Source: Unleashed FAQ (2010-05-13), PUI Rules Team (2010-05-13)
Three cards have been added to the list of errata for the Pokémon Trading Card Game. [...] The text below reflects what the card should say, not what was originally printed. "When you attach an Energy card from your hand to Onix, remove a damage counter from Onix." This Poké-Body only works when you attach an Energy card to Onix.
Source: PUI Rules Team (2010-05-06), TPCi Errata Update (2010-05-07)
Can I use Ninetales' "Roast Reveal" Poke-POWER when I have no cards in my deck?
Yes, you do as much of the power as you are able; discard 1 Fire Energy card from your hand, then the Poke-POWER's effect ends, without drawing any cards.
Source: HeartGold & SoulSilver FAQ (2010-02-11), PUI Rules Team (2010-02-11)
Can Typhlosion's "Afterburner" Poke-POWER be used if there is no Energy in the discard pile, just to place a damage counter on one of my Pokemon?
No. Since you can't attach an Energy from your discard pile to one of your Pokemon, you can't use the rest of the power.
Source: HeartGold & SoulSilver FAQ (2010-02-11), PUI Rules Team (2010-02-11)
If my opponent has less than 3 cards in his or her deck, so that I can't reorder the top 3 cards, can I still use Slowking's "Second Sight" Poke-POWER to look at the remaining cards in the deck?
Yes, you look at your opponent's remaining cards, then put them back in the deck in any order.
Source: HeartGold & SoulSilver FAQ (2010-02-11), PUI Rules Team (2010-02-11)
Can I use Shedinja's "Vessel of Life" Ability to attach it to a Pokemon that already has another Pokemon Tool card attached?
No, you cannot; the rulebook states "each Pokemon can have only 1 Pokemon Tool attached at any time". However, if there's an effect that overrides that rule, such as Genesect GX's "Double Drive" Ability, then you would be able to attach Shedinja to a Pokemon that already has another Pokemon Tool card attached.
Source: TPCi Rules Team (2018-12-27), TPCi Rules Team (2009-01-03)
If I intend to use a Poke-POWER [or Ability], do I have to announce its name or can I just take the action specified?
You have to clearly communicate your intent to use a Poke-POWER [or Ability] by some method other than just performing its game effect. Show or tell your opponent which Pokémon is going to use what Power.
Source: PUI Rules Team (2008-11-13)
If I use Caterpie's "Pupate" Poke-POWER to successfully evolve into Metapod, can I then immediately use Metapod's "Emerge" Poke-POWER to attempt to evolve into Butterfree, all on the same turn?
Yes, you can.
Source: PUI Rules Team (2008-02-21)
If my opponent has a Pokémon with only 2 damage counters on it, can I still use Absol-EX's "Cursed Eyes" Poké-POWER on it?
Yes, you can. If you use this power, you move the 2 damage counters to another one of your opponent's Pokémon.
Source: Power Keepers FAQ (2007-02-01), PUI Rules Team (2007-02-01)