Pokémon regulation marks and rotation explained
Look at the bottom-left corner of any recent Pokémon card and you will find a single letter in a tiny box. Most collectors never give it a second thought, but for players it is the most important symbol on the card: it decides whether the card can be used at an official tournament this season. Here is how the system works, and why it matters even if you never plan to play.
What the regulation mark is
The regulation mark is a letter printed on every card released since Sword & Shield. All cards printed during the same window share a letter, and the letters move forward through the alphabet over time: D and E during early Sword & Shield, F from Brilliant Stars, G from the Scarlet & Violet base set, H from Temporal Forces, I from Journey Together, and so on.
Before regulation marks, working out what was legal meant checking a list of set names. Now a judge, an opponent or a new player can glance at a card and know the answer. Basic Energy cards are the exception: they carry no mark and are always legal.
Standard, Expanded and Unlimited
| Format | Which cards | Where you will see it |
|---|---|---|
| Standard | Only the regulation marks currently in rotation | Most Play! Pokémon events, from League Cups to the World Championships, and the default in Pokémon TCG Live |
| Expanded | Black & White onwards, minus a ban list | Some regional events and players who want to use older cards |
| Unlimited | Any card ever printed | Casual games at home or at the store |
How rotation works
Once a year, the oldest regulation mark (or marks) still in Standard drops out. This is rotation. It keeps the card pool to a manageable size, gives new sets room to matter and stops the same strategies from dominating for years.
Rotation is announced months in advance and usually takes effect in spring, around the release of the first set of the season: first in Pokémon TCG Live, then at in-person tournaments shortly after. In 2025 the F mark left Standard; in 2026 it was G's turn.
Lists of legal marks go out of date every year. Every card page on TCGNav shows a legality field for Standard and Expanded that updates automatically, which is more reliable than any table written down once.
Reprints can keep an old card legal
Here is the detail that surprises people. If a card is reprinted in a newer set with exactly the same name and text, older printings of it are generally allowed in Standard too, even if their own mark has rotated. That is why staple trainer cards such as Professor's Research or Nest Ball keep appearing in decks year after year. When in doubt, check the current Play! Pokémon rules or the card's legality on its TCGNav page before a tournament.
What rotation means if you only collect
Nothing changes about the card itself. Rotation is a tournament rule, not an expiration date: rarity, artwork and collector appeal stay exactly where they were. Many of the most valuable cards in the hobby have not been tournament-legal for decades.
Prices are a different story for cards whose value came from competitive play. A trainer or Pokémon ex that every top deck needed can lose a large share of its price within weeks of rotating, because player demand disappears overnight. Chase cards and alternate arts usually hold up far better, since collectors were the ones buying them in the first place.
If you buy singles to play, check how many seasons a card has left before paying a premium. If you trade, the months before rotation are when players sell their soon-to-rotate cards, which can be a good time for collectors to pick up the alternate-art versions.
Quick checklist
- Find the letter in the small box at the bottom left of the card.
- No letter at all means the card predates the system: not Standard-legal on its own, but possibly legal in Expanded if it is from Black & White or later.
- When it matters, check the card's legality field rather than relying on a list.
Where to go next
The regulation mark is just one of the symbols printed along the bottom of a card. Our card anatomy guide covers all of them in one pass.