Trainers » Looker Whistle
Can I use Looker Whistle to search my deck for another Looker Whistle since "Looker" is part of its name?
No, you cannot. You can only search for the card named "Looker".
Source: Ultra Prism FAQ (2018-01-19), TPCi Rules Team (2018-02-01)
Trainers » Cyrus {*}
When using Cyrus{*} does my opponent shuffle in their Active Pokemon too?
No, your opponent only shuffles in their Benched Pokemon except for the 2 that were chosen.
Source: Ultra Prism FAQ (2018-01-19), TPCi Rules Team (2018-02-01)
Gameplay » Deck
The "Prism Star rule" on the card says "you can't have more than one {*} card of the same name in your deck", but can I have more than one Prism Star cards of different names in my deck?
You can have several Prism Star cards in your deck as long as they are different names, but only one copy of each. For example, you can have one Giratina {*} and one Lunala {*} and one Super Boost Energy {*}, and so on. This rule is not ignored for Limited tournaments such as Prereleases, Drafts, etc.
Source: Ultra Prism FAQ (2018-01-19), TPCi Rules Team (2018-02-01)
Energy » Unit Energy
Can I have 4 Unit Energy {G}{R}{W} and 4 Unit Energy {L}{P}{M} in my deck?
Yes, you can. The symbols {G}{R}{W} and {L}{P}{M} are part of the name of the card, so they are counted as different cards. When adding Unit Energy cards to a decklist, be sure to include the symbols as part of the card name on your list; you may list them as "Unit Energy GRW" and "Unit Energy LPM".
Source: Ultra Prism FAQ (2018-01-19), TPCi Rules Team (2018-02-01)
Attacks » Timeless GX
When you use Dialga GX's "Timeless GX" attack does Poison still happen in between turns?
Nope, the attack says to "skip the between-turns step", so Asleep, Poisoned, Burned, and any other between turn effects also get skipped."
Source: Ultra Prism FAQ (2018-01-19), TPCi Rules Team (2018-02-01)
Attacks » Timeless GX
After time is called at the end of a match, what happens if I use Dialga GX's "Timeless GX" attack during the "plus three turns" part?
If you use Timeless GX when time is called during your turn, you would then get "Turn 1" instead of your opponent. Likewise, if you use it during Turn 1 you would also get Turn 2 and your opponent would get Turn 3, and so on... However, if you use it on the final turn of the match you do not get an extra turn.
Source: Ultra Prism FAQ (2018-01-19), TPCi Rules Team (2018-02-01)
Attacks » Inviting Poison
If my opponent has no benched Pokemon, does the current Active Pokemon become poisoned if I attack with Roserade's "Inviting Poison"?
No, it does not become poisoned. If there's no switch to the bench there's no "new Active Pokemon" to become poisoned.
Source: Ultra Prism FAQ (2018-01-19), TPCi Rules Team (2018-02-01)
Attacks » Damage Transport
What happens during Drifblim's "Damage Transport" Attack if I have less than 4 damage counters on one or more of my Pokemon?
If there are 4 or less damage counters on one of your Pokemon you must move all of them.
Source: Ultra Prism FAQ (2018-01-19), TPCi Rules Team (2018-02-01)
Attacks » Damage Transport
Can I choose to move less than 4 damage counters on one or more of my Pokemon when using Drifblim's "Damage Transport" Attack? Or can I choose to skip any of my Pokemon?
No, if you have 4 or fewer damage counters on any of your Pokemon you must move them.
Source: Ultra Prism FAQ (2018-01-19), TPCi Rules Team (2018-02-01)
Abilities » Psychic Transfer
Can I use Lunala GX's "Psychic Transfer" Ability to move a {P} energy back to where I got it from on the same turn? How about if I move it between the same two Pokemon several times in a row?
You have to advance the game state with your actions. If your Psychic Transfers are mindless, then you are not advancing the game state and it could result in a penalty.
Source: Ultra Prism FAQ (2018-01-19), TPCi Rules Team (2018-02-01)