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)
My opponent MUST put their basic down first before they draw 1 card for my mulligan, right? Say my opponent draws a better choice starter Pokémon when I mulligan, are they allowed to switch it out with another from their hand?
They must place their active Pokémon and their prizes before optionally drawing a card for the mulligan. Once placed, the active cannot be changed during setup; but you are allowed to add a new Pokémon to your bench, if there is room.
Source: PUI Rules Team (2005-06-16), PUI Rules Team (2006-02-09), PUI Rules Team (2006-07-27)
Holon Energy WP and Ancient Technical Machine [Ice] only prevent effects that come from attacks, not all effects in play. Trainer cards, Poké-Powers, and Poké-Bodies are not prevented by those cards.
Source: PUI Announcement (2006-07-25)
Blastoise-EX and Articuno-EX each have an attack that discards an Energy card from the Defending Pokémon. The player using those attacks is also the player who chooses the Energy card to be discarded.
Source: PUI Announcement (2006-07-25)
Before starting the game, Player-A has a Basic Pokémon but Player-B does not. On Player-A's draw 1 card for mulligan, say they draw a better choice for starting Pokémon; are they allowed to switch it out with the one they chose to be their 1st active before the mulligan? And if they choose to switch, must it stay on the field and not allowed to be put back into hand?
Player A continues his or her setup and can choose to draw an extra card after setting aside his or her Prize cards. Once placed, the active cannot be changed during setup, but a mulligan card can be placed onto the bench.
Source: PUI Rules Team (2005-05-05), PUI Rules Team (2006-02-09)
I have never had this come up and I can't find anything saying you can't, but can you attach 2 Technical Machines to the same Pokémon at the same time?
There are no restrictions on TM's that say you cannot, so yes you can.
Source: PUI Rules Team (2006-01-26)
In a sanctioned Tournament, does the player have to show his hand in the event they have no Basics at the start of the game? The Floor Rules don't explicitly say that they have to.
Yes, you still reveal your hand before you shuffle it back into your deck. The rules from the rulebook still apply unless specifically stated otherwise.
Source: PUI Rules Team (2003-10-16), PUI Rules Team (2006-01-26)
Is it required to have a Basic Pokémon in your deck? For example, could I make a deck with just the fossils and no other Basic Pokémon in it?
Starting with EX:Delta Species, there is now a requirement to have at least 1 Basic Pokémon in a deck in order to be considered a legal deck.
Source: PUI Rules Team (2006-01-12)
Could I use a Poké-POWER, Poké-BODY, Attack, or Trainer to search through my deck for a particular card if I already know that card is not in my deck (i.e. using Energy Search if you know there are no basic Energy left in the deck due to previous unsuccessful searches)?
Yes you may, but if done repeatedly a judge may evaluate whether it's being used legitimately or merely as a stalling tactic.
Source: PUI Rules Team (2005-12-08)