If I use Indeedee's "Expert Nurturer" attack, do I have to declare what card I am getting before I look through my deck?
No. You can look through your deck before deciding on which Pokemon to evolve.
Source: TPCi Rules Team (2023-03-30)
Can I use Indeedee's "Expert Nurturer" attack to evolve a Pokemon on the first turn of the game, or on the first turn that Pokemon came into play?
Yes, it can.
Source: TPCi Rules Team (2023-03-30)
If my opponent used Banette ex's "Everlasting Darkness" attack on their last turn, can I attach Vitality Band to my Pokemon on my turn?
Yes, Vitality Band is a Pokemon Tool card, not an Item card.
Source: Scarlet & Violet FAQ; TPCi Rules Team (2023-03-30)
If my opponent's Dolliv attacks with "Apply Oil" then on my turn I switch to a new Active Pokemon, do I still have to flip a coin to successfully attack?
No. Even though the effect references the opponent it was placed on "the Defending Pokemon", so the effect went away when you changed your Active Pokemon.
Source: Scarlet & Violet FAQ; TPCi Rules Team (2023-03-30)
If I use Medicham's "Acu-Punch-Ture" attack and the opponent switches to a different Active Pokemon that has the same attack as the one I chose for "Acu-Punch-Ture", can they use that attack?
The effect was on the Pokemon that was attacked, so if that Pokemon switches out the new Active Pokemon can use their attack of the same name.
Source: Scarlet & Violet FAQ; TPCi Rules Team (2023-03-30)
If my opponent has Arcanine ex or Gyarados ex on the Bench, will its "Tera" attribute prevent me from placing damage counters on it with Drifblim's "Curse Spreading" attack?
No, placing damage counters is different than dealing damage, so it won't be prevented.
Source: Scarlet & Violet FAQ; TPCi Rules Team (2023-03-30)
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)
Beginning with the Scarlet & Violet expansion, "Pokemon Tool" will be its own category of Trainer card; Pokemon Tool cards will no longer be printed as Item cards. Pokemon Tool cards from all previous series will receive errata to align with this change, meaning that older Tool cards are no longer considered as "Item cards".
Source: TPCi Announcements (2022-12-12) [https://www.pokemon.com/us/pokemon-news/2023-pokemon-tcg-standard-format-rotation-and-pokemon-tool-errata]; Scarlet & Violet FAQ; TPCi Rules Team (2023-03-30)
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)
If I use Sky Seal Stone's "Star Order" Ability and then my Basic Pokemon V's attack knocks out my opponent's Active Mew VMAX with a Fusion Strike Energy attached, do I take an additional prize card or not?
Fusion Strike Energy prevents all effects of your Pokemon's Abilities done to the opponent's Fusion Strike Pokemon the energy card is attached to; but the effect of Star Order is not on the opponent’s Pokemon, so you get to take the extra prize.
Source: TPCi Rules Team (2023-01-26)