Can I use Empoleon's "Diving Draw" Ability if I have no cards left in my deck, and just discard a card from my hand?
Yes, you can. The first sentence of Diving Draw says to discard a card from your hand. Then if you can do that, you do as much of the rest of the Ability as you can, which in this case is draw no cards.
Source: TPCi Rules Team (2012-10-04)
If my opponent has Ampharos with "Electromagnetic Wall" in play, when I attach a Double Colorless Energy to one of my Pokemon, do I place 3 or 6 damage counters?
You place 3 because there was only one attachment, even though the attachment provided multiple energies.
Source: TPCi Rules Team (2012-09-13)
Would Emboar's "Inferno Fandango" Ability trigger Ampharos' "Electromagnetic Wall" Ability? Or does "Electromagnetic Wall" only apply to the opponent's normal once-per-turn energy attachment?
Any energies attached from the hand would trigger Electromagnetic Wall, regardless of whether they're attached due to an Ability or the normal once-per-turn energy attachment.
Source: TPCi Rules Team (2012-09-13)
Does "Garbotoxin" prevent "Bright Look" on Ninetales coming from your hand, "Electromagnetic Wall" on Ampharos in play and "Rebirth" on Ho-Oh EX in your discard pile?
Yes, Garbotoxin makes it so that each Pokemon in play, in each player's hand, and in each player's discard pile has no Abilities.
Source: Dragons Exalted FAQ (2012-08-23), TPCi Rules Team (2012-08-23)
If I flip heads for Ho-Oh EX's "Rebirth" Ability, if I only have one Fire and two Lightning energy cards in the discard pile, can I take all three of those?
No, you can only take one of each different type of energy, up to three total. So in this case you could only take one Fire and one Lightning.
Source: Dragons Exalted FAQ (2012-08-23), TPCi Rules Team (2012-08-23)
If I have two Ho-Oh EX in my discard pile and flip tails for "Rebirth", can I flip a second time?
You can flip once for each Ho-Oh EX in your discard pile, but each coin flip is treated individually.
Source: Dragons Exalted FAQ (2012-08-23), TPCi Rules Team (2012-08-23)
When I use Ninetales' "Bright Look" Ability, which player chooses which Pokemon becomes active?
The player using the ability chooses which of his or her opponent's Pokemon becomes active.
Source: Dragons Exalted FAQ (2012-08-23), TPCi Rules Team (2012-08-23)
When I put Shedinja onto my bench using Ninjask's "Cast-off Shell" Ability, can Eviolite help protect it from damage?
No, because Shedinja is not a "Basic Pokemon"; it is an unevolved Stage-1 Pokemon.
Source: TPCi Rules Team (2012-08-23)
For Mew EX's "Versatile" Ability, do I need to have the same energy types as the attack I'm copying, or will any type of energy work as long as I have the correct number of energies?
You must meet the energy requirements as to both type and number for the attack Mew EX is copying. So if the attack requires two Water energy, you will need to have at least two Water energy attached to Mew EX.
Source: PUI Rules Team (2006-02-16), Dragons Exalted FAQ (2012-08-23) Dragons Exalted FAQ (2012-08-23)
If my Wailord uses "Giant Wave" this turn, can my opponent's Mew EX's "Versatile" Ability use that attack on the turn following mine?
Yes. The effect of "this Pokemon can't use Giant Wave next turn" applies only to the Pokemon that attacked with it.
Source: Dragons Exalted FAQ (2012-08-23), TPCi Rules Team (2012-08-23)