Say I have Liepard active and Raikou-EX and Victini on my bench. I attack with Liepard's "Assist", flip heads and choose to copy Raikou-EX's "Thunder Fang" attack but flip tails for "Thunder Fang's" paralysis part. If I then use Victini's "Victory Star" Ability to re-flip the coins, assuming I get heads for "Assist" could I choose a different benched Pokemon's attack or would I have to choose "Thunder Fang" again?
Since Victory Star rewound all the coin flips it's as if the Assist attack never happened. So yes, you could choose a different benched Pokemon's attack, if you flip heads for Assist of course.
Source: TPCi Rules Team (2013-01-31)
If I have a Liepard with 3 Darkness Energies on it and I use "Assist", can I use Charizard's "Scorching Fire" attack despite not having a Fire Energy to discard?
Yes, you can. The damage amount is done regardless of whether Liepard has any Fire Energy attached to it or not, but if you do have a Fire Energy attached to Liepard you must discard it.
Source: TPCi Rules Team (2012-11-29)
If my opponent has Celebi-EX with "Time Recall" in play, can I use Golduck's "Amnesia" attack to prevent the Defending Pokemon from using one of its previous evolution's attacks?
No, you can only use Amnesia on the attacks that are present on the opponent's card at the time of your attack.
Source: PUI Rules Team (2005-03-10), Boundaries Crossed FAQ (2012-11-08) Boundaries Crossed FAQ (2012-11-08)
Does Giratina EX's "Shred" attack ignore effects such as Weakness and Resistance?
No, Weakness and Resistance are not considered effects; they are basic game mechanics and are not ignored by Shred.
Source: TPCi Rules Team (2012-10-04)
When Manectric attacks with "Flash Impact", can you choose to put the 20 damage onto Manectric or does it have to be put onto one of your benched Pokemon.
The recoil damage from Flash Impact can be placed on any of your Pokemon, including the one performing the attack.
Source: Dragons Exalted FAQ (2012-08-23), TPCi Rules Team (2012-08-23)
When using Sableye's "Junk Hunt" attack, do I have to show my opponent which 2 Item cards I put from my discard pile into my hand?
Yes, you do. The Discard Pile is a public zone, and you can't do anything to it that your opponent isn't fully aware of.
Source: TPCi Rules Team (2012-08-23)
Can you use Terrakion EX's "Pump-up Smash" attack if you don't have 2 basic Energy cards in your hand?
Yes, you can. You do the 80 damage then attach either one or no Basic Energy, depending on what you have in your hand.
Source: TPCi Rules Team (2012-08-23)
Does Blend Energy count for 4 types with regard to Ho-Oh EX's "Rainbow Burn" attack?
The Rainbow Burn attack only uses Basic Energy cards to calculate the amount of damage done. Since Blend Energy cards are not Basic Energy cards, they would not add to the amount of damage for this attack.
Source: Dragons Exalted FAQ (2012-08-23), TPCi Rules Team (2012-08-23)
Would Giratina EX's "Shred" attack allow my opponent to knock out my Shednija (with "Empty Shell") and take a prize since the attack says its not affected by any effects on the Defending Pokemon?
The damage done by Shred is not affected by Empty Shell, but that has nothing to do with whether you take a prize or not. You still get no prize because of "Empty Shell".
Source: PUI Rules Team (2006-01-12), Dragons Exalted FAQ (2012-08-23) Dragons Exalted FAQ (2012-08-23)
What happens if Golurk uses "Devolution Punch" against a Basic Pokemon without any evolution cards attached?
Devolution Punch will do the damage but will not put a Basic Pokemon back into the opponent's hand.
Source: Dragons Exalted FAQ (2012-08-23), TPCi Rules Team (2012-08-23)