A Pokémon card can be genuine and well protected yet still be illegal in a Standard tournament. The first check is therefore not value or rarity, but format, regulation mark, possible reprint and the official documents that apply on the event date.
Regulation marks are letters printed at the bottom-left of modern cards. Play! Pokémon uses them to rotate the Standard format. Because the legal set changes over time, use a repeatable method instead of memorising a letter that will expire.
What the mark tells you
Cards covered by the system have carried a regulation letter since 2020. It identifies their Standard cycle; it does not indicate rarity, power, condition or authenticity. Rotation periodically removes older marks. Always read the current Play! Pokémon announcement and the event page.
Four separate questions
| Question | Check |
|---|---|
| Which format is used? | Event page or organiser |
| Which marks are legal? | Current Play! Pokémon rules |
| Can an older printing be used? | Official database, equivalence and errata |
| Which languages are accepted? | Regional event policy |
Do not transfer a rule from another region, alternative format or digital platform without checking the physical event.
The five-check Poke-Geek method
- Record the event date, region and announced format.
- Read the exact card name, mark, expansion and number.
- Check the legal marks on the official page.
- Search for a current reprint of an older card.
- Review errata and event restrictions.
Older printings require a precise check
An old mark does not always settle the question. Official rules allow certain older printings, including cards without a mark, when a currently legal version exists and the equivalence conditions are met. Compare the exact name and function, and use current errata. Similar artwork or a similar name is not proof.
Expansion number and mark are different
The set code and collector number identify the printing; the regulation mark identifies its Standard cycle. The guide to reading a Japanese Pokémon card helps locate symbols and numbers, but it does not establish legality at a European event. Language permission is a separate regional rule.
Build a deck audit table
Add four columns to your deck list: name, quantity, mark on the copy used and legal reference printing. Sort each row as directly legal, legal through a reprint, needs checking or replace. Finish this before the Pokémon TCG game setup, then repeat the official check shortly before the event.
Common mistakes
- Using the copyright year instead of the mark.
- Keeping an old rotation announcement bookmarked.
- Assuming every unmarked card is illegal without checking reprints.
- Treating similar names as equivalent.
- Ignoring errata.
- Mixing Standard legality with language policy.
Event-eve checklist
- Format, date and region confirmed.
- Official legal marks checked again.
- Every disputed card has an exact reference.
- Older printings have a verified legal reprint.
- Errata are accessible.
- Card languages comply with local policy.
- The submitted list matches the physical deck.
Browse the Pokémon range to identify expansion, language and version clearly. CTA: audit the four columns of your deck list today and repeat the official check the day before the event.