Cards in General - Pokémon Rulings Compendium

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)

Gameplay » Cards in General

You can have four Single Strike Urshifu V and four Rapid Strike Urshifu V in your deck because "Single Strike" and "Rapid Strike" are part of the card name for these cards. Also, Single Strike Urshifu VMAX must evolve from Single Strike Urshifu V (and vice versa for the Rapid Strike ones).

Source: Battle Styles FAQ; TPCi Rules Team (2021-03-18)

Gameplay » Cards in General

When the text for a previously released card changes in a new set, how are the older cards played?: You will need to start using the new text as soon as the set is released.

Source: WotC Chat (2002-09-05)

Gameplay » Cards in General

Can people have more then one card in a sleeve, I have caught people trying to cheat this way. Will you get DQ'ed for it ?: Having 2 cards in a sleeve counts as a marked card. There are rules and punishments for this infraction listed on the tournament floor rules.

Source: WotC Chat (2001-06-14)

Gameplay » Cards in General

What is a marked card?: A card that you can tell what it is by a glance (without seeing the front). It might have a different back, be scratched or written on in some way, be more worn out than the other cards, etc."

Source: WotC Chat (2000-08-03)

Gameplay » Cards in General

What is an opaque card sleeve?: An opaque card sleeve is one that has a backing you cannot see through...common opaque [sleeves] are red and/or black

Source: WotC Chat (2000-07-27)

Gameplay » Cards in General

Are Promos legal in tourney and league play?: Promo cards are legal in tourney and league play [As long as they have been released in the local area].

Source: WotC Chat (2000-01-27)