Abilities » Energy Trans
Can you "Energy Trans" or "Dark Trance" a Rainbow Energy, Multi Energy, or any other special energy cards?
As long as they are providing the proper energy type and don't violate any other restrictions written on the card, then yes you may.
Source: PUI Rules Team (2004-05-06), PUI Rules Team (2005-11-17)
Trainers » *Trainers in General
Could I play a trainer if it's obvious that it will have no effect (i.e. Life Herb on a Pokémon without any damage and with no Special Conditions on it)?
No, you cannot play a card if it is obvious that you cannot do what the card is supposed to do at that moment.
Source: PUI Rules Team (2005-09-22)
Attacks » Call for Friends
Can you use Strike and Run, or Call for Friends type attacks to retrieve Fossils from your deck? What about using Pokémon Retriever to get them from your discard pile?
No, you cannot search for a Fossil trainer with any Pokémon searching technique.
Source: PUI Rules Team (2005-07-07)
Errata » Knockout Gas
The Poké-BODY "Knockout Gas" found on Koffing should read, "If Koffing is your Active Pokémon and is Knocked Out by damage from an opponent's attack, the Attacking Pokémon is now Confused and Poisoned." So only attacks that do damage (not "place counters") would cause Knockout Gas to be invoked.
Source: PUI Rules Team (2005-06-23)
Trainers » Rare Candy
If you use Rare Candy to evolve a Pokémon, and the evo card has a "Coming into Play" Pokémon Power (such as Dark Crobat), does that coming into play power get activated?
Using Powers, Attacks, or Trainers that let you put a Pokémon in the game from your hand will allow coming into play Powers to activate. This is a reversal from previous rulings.
Source: PUI Rules Team (2003-10-23), PUI Rules Team (2005-04-14)
Errata » Buffer
The Poké-BODY "Buffer" found on Hoppip, Skiploom, and Jumpluff should read, "If Hoppip/Skiploom/Jumpluff would be Knocked Out by damage from an opponent's attack, flip a coin...". So only attacks that do damage (not "place counters") would cause Buffer to be invoked.
Source: PUI Announcement (2005-04-05), PUI Rules Team (2005-04-07)
Gameplay » Win States
I have Hidden Legends Electrode and use "Mass Destruction" to knock out Electode and the defending Pokémon. If I have only one prize left and my opponent has more, but I have no bench and my opponent has a bench, do I still win?
No, in this situation it would go to Sudden Death. However, if the opponent did not have any Pokémon on their bench, the Electrode player would have two win conditions vs. one, and would therefore win the game.
Source: PUI Rules Team (2005-03-10)
Abilities » Conductivity
If I have Quagsire and my opponent has Ampharos-EX in play and I attach an energy card to my Quagsire from my hand, which Poke-POWER gets applied first, Saturation or Conductivity?
Conductivity and Saturation happen at the same time, so the player attaching energy would get to decide which effect to apply first.
Source: PUI Rules Team (2005-03-03)
Trainers » Rare Candy
Can I evolve Dratini in play to Dark Dragonite by using Rare Candy?
Yes. [This is true as long as there is a normal evolutionary path between the basic and the Stage 2 "Dark" Pokémon.]
Source: PUI Rules Team (2005-02-10)