Can I use Raihan if I don't have any basic Energy cards in my discard pile to attach to 1 of my Pokemon?
No, the main effect of Raihan is attaching a basic Energy card from your discard pile to 1 of your Pokemon, so you can't play the card if you can't do that.
Source: Evolving Skies FAQ; TPCi Rules Team (2021-08-26)
If I have four Plasma Energy in play, either on the field and/or in the Discard Pile, can I use Colress Machine to search through my deck, find nothing, and shuffle my deck?
No you cannot. Since the location of all four Plasma Energy cards are known, there's no way Colress Machine would be able to find one during a deck search.
Source: TPCi Rules Team (2013-02-28); TPCi Rules Team (2021-07-01)
If a player uses Venomoth's "Dizzying Wind" attack and the opponent tries to play a U-Turn Board during their following turn and flips tails, does U-Turn Board go back into their hand or stay in the discard pile?
If the opponent flips tails U-Turn Board is discarded and does not return to your hand.
Source: TPCi Rules Team (2021-07-01)
If I attacked with a Rapid Strike Pokemon last turn, then use Ninja Boy to swap it with Zeraora V, would the Zeraora V's "Cross Fist" attack do damage to a Benched Pokemon?
No, all effects carry over, so it would be considered the same Pokemon.
Source: TPCi Rules Team (2021-07-01)
Say I played Mimikyu V and used its "Dummy Doll" Ability on my turn. Then on my opponent's next turn, they play a Path to the Peak stadium. Does that cancel the effect of "Dummy Doll"?
Since the Dummy Doll Ability activated and placed an effect before Path to the Peak came into play, its effect remains.
Source: TPCi Rules Team (2021-07-01)
If I have Greedent in play, will its "Brazen Tail" Ability prevent Faba from putting my Special Energy into the Lost Zone?
No, Brazen Tail does not protect against the Lost Zone.
Source: TPCi Rules Team (2021-07-01)
Can I use Urn of Vitality to shuffle the card Impact Energy from my discard pile into my deck?
No, you cannot. Urn of Vitality is only able to target a specific card named "Single Strike Energy". Although Impact Energy is a "Single Strike" Energy card, it is not "Single Strike Energy".
Source: Chilling Reign FAQ; TPCi Rules Team (2021-06-17)
When using Peonia, do the cards I take count as "Prizes taken" for effects that count how many Prize cards you have taken?
No, it does not.
Source: Chilling Reign FAQ; TPCi Rules Team (2021-06-17)
When using Peonia, do I have to randomize my Prize cards after putting them back?
Rearranging the prize cards is not part of Peonia's effect, so wherever you put the new prize card is where it should stay until some other action causes the prize cards to be rearranged.
Source: Chilling Reign FAQ; TPCi Rules Team (2021-06-17)