Abilities » Adaptive Evolution | Trainers » Rare Candy
Can I use Rare Candy on a Scatterbug the first turn of the game or the turn that Scatterbug is played, since "Adaptive Evolution" says it can evolve in those cases?
No, you can't use Rare Candy to evolve in either of those conditions because the text on Rare Candy specifically prevents it.
Source: Scarlet & Violet FAQ; TPCi Rules Team (2023-03-30)
Abilities » Frontier Road | Abilities » Neutralizing Gas
If I use Escape Rope and my opponent brings up Galarian Weezing with "Neutralizing Gas", if I bring up my Wyrdeer V with "Frontier Road" Ability would it get to use "Frontier Road" or not?
Neutralizing Gas would turn on before Wyrdeer V becomes active, so Wyrdeer V would not get to use its "Frontier Road" Ability.
Source: TPCi Rules Team (2023-02-09)
Abilities » Shield Star
If I use Zamazenta VSTAR's "Shield Star" Ability, does it still reduce the damage by your opponent's attacks if Zamazenta VSTAR is removed from play (e.g. Path to the Peak) or if abilities are turned off (e.g. Aerodactyl VSTAR's "Ancient Star")?
The effect of this Ability remains if Zamazenta VSTAR is removed from play or if abilities are turned off.
Source: TPCi Rules Team (2023-01-19)
Abilities » Conversion Star
If I have no cards in my hand, can I use Rotom VSTAR's "Conversion Star" Ability?
You must have at least 1 card in hand and 1 in your deck to use the ability. If you do, you can discard as many cards from your hand as you want.
Source: TPCi Rules Team (2023-01-19)
Trainers » Earthen Seal Stone | Abilities » Fighting Instinct | Meta-Rulings » Meta-Rulings
Any effect that alters the cost of a Pokemon's attacks is intended to alter the cost of ANY attack that Pokemon uses, not just the ones printed on the card. This means any attack that the Pokemon is given access to, such as Earthen Seal Stone's "Star Gravity" attack when attached as a tool, can be used at the altered cost when effects such as Galarian Zapdos V's "Fighting Instinct" Ability are in play. For example, Fighting Instinct says, "This Pokemon's attacks cost {C} less for each of your opponent's Pokemon V in play"; however a more accurate description would be, "Attacks that this Pokemon uses cost {C} less for each of your opponent's Pokemon V in play." This applies to effects that reduce or increase attack costs, and goes all the way back to the Black & White series thru current series.
Source: TPCi Rules Team (2022-12-01)
Abilities » Mysterious Nest | Attacks » Star Cipher
If I use Unown VSTAR's "Star Cipher" attack while Dunsparce with "Mysterious Nest" Ability is in play, are my opponent's colorless Pokemon's Weakness set to {P} or do they have no Weakness at all?
The Star Cipher attack would switch your opponent's Pokemon's weakness to {P}, but then Dunsparce's Mysterious Nest would change all colorless Pokemon to no weakness.
Source: TPCi Rules Team (2022-11-10)
Trainers » Earthen Seal Stone | Abilities » Fighting Instinct
If I have Galarian Zapdos V with "Fighting Instinct" Ability active and an Earthen Seal Stone attached, and my opponent has 3 Pokemon V in play, can Galarian Zapdos V use Earth Sealing Stone's "Star Gravity" attack for free?
Yes, you can
Source: TPCi Rules Team (2022-11-10)
Abilities » Dew Guard | Trainers » Sordward & Shielbert
If my opponent has Milotic with "Dew Guard" Ability is in play, what happens if I play Sordward & Shielbert from my hand?
Since the opponent cannot answer the question due to the effect of Dew Guard, Sordward & Shielbert fizzles and nothing happens.
Source: TPCi Rules Team (2022-11-10)
Abilities » Transistor
If I have multiple Regieleki VMAX with the "Transistor" Ability in play, will my Basic {L} Pokemon's attacks do +30 more damage for each one?
Yes, the Transistor Ability will stack.
Source: Silver Tempest FAQ; TPCi Rules Team (2022-11-10)
Abilities » Summoning Star
Can I use Lugia VSTAR's "Summoning Star" Ability to put a Colorless Stage 2 Pokemon from my discard pile directly onto my bench?
Yes, Summoning Star can put any Stage of Colorless Pokemon onto the Bench from your discard pile as long as it doesn't have a Rule Box.
Source: Silver Tempest FAQ; TPCi Rules Team (2022-11-10)