Attacks » Electro Wheel
What happens if I use Morpeko V's "Electro Wheel" attack but I don't have any Benched Pokemon?
You still have to discard an Energy if you can, but since there are no Benched Pokemon to switch with, Morpeko V stays in the Active Spot.
Source: Sword & Shield FAQ (2020-01-24), TPCi Rules Team (2020-02-06)
Attacks » Coil
If I used Sandaconda's "Coil" attack and my opponent retreats their Active Pokemon, do I still do an extra 120 damage to the new Defending Pokemon?
Yes. The attack states "your opponent's Active Pokemon". That is referencing any Pokemon that is in their Active Spot.
Source: Sword & Shield FAQ (2020-01-24), TPCi Rules Team (2020-02-06)
Attacks » Beak Catch
If I use Cramorant V's "Beak Catch" attack, can I choose to fail to get any cards from my deck?
Only if there are no cards left in your deck. Since you can get any type of card, and it is known that you have cards in your deck, you must take at least 1 card if you are able to.
Source: Sword & Shield FAQ (2020-01-24), TPCi Rules Team (2020-02-06)
Abilities » Untamed Shout
If I use Rare Candy to play Galarian Obstagoon, can I use its "Untamed Shout" Ability to place 3 damage counters on my opponent's Pokemon?
Yes, because it is still being played from your hand.
Source: Sword & Shield FAQ (2020-01-24), TPCi Rules Team (2020-02-06)
Abilities » More Poison
If I have two Toxicroak in play with the "More Poison" Ability, will my opponent put 4 more damage counters on their Poisoned Pokemon?
Yes, because the Ability says to "put 2 more" and not "instead of".
Source: Sword & Shield FAQ (2020-01-24), TPCi Rules Team (2020-02-06)
Abilities » Make Do
For Cinccino's "Make Do" Ability, can I use it when I'm discarding a card as part of some action or effect?
No. Discarding a card from your hand is part of the cost of using the Ability. You can't use a discard done from some other effect or game action.
Source: Sword & Shield FAQ (2020-01-24), TPCi Rules Team (2020-02-06)
Abilities » Make Do
Can I use Cinccino's "Make Do" Ability to discard a card, then do other game actions such as play a Cynthia, and then finally draw the two cards later in my turn?
That's not how it works. You have to perform all of the actions of the Ability before moving on to other game actions.
Source: Sword & Shield FAQ (2020-01-24), TPCi Rules Team (2020-02-06)
Abilities » Make Do
Can I use Cinccino's "Make Do" Ability if there are no cards in my deck, just to discard a card?
No, you can't use Make Do if there aren't any cards left in your deck.
Source: Sword & Shield FAQ (2020-01-24), TPCi Rules Team (2020-02-06)
Trainers » Quick Ball | Errata » Quick Ball
The wording of Quick Ball is now as follows, "You can play this card only if you discard another card from your hand. Search your deck for a Basic Pokémon, reveal it, and put it into your hand. Then, shuffle your deck."
Source: TPCi Announcement (2020-01-09), TPCi Rules Team (2020-01-09)