"Standard legal" gets mentioned constantly around competitive Pokémon, and it's worth understanding exactly what it does and doesn't restrict.
A rolling window of sets
Standard legal means a card falls within the current rotation window of recent sets permitted in Standard-format tournaments — as new sets release and old ones rotate out, that window keeps moving forward.
Standard vs Expanded
Standard only allows the current rotation window, kept relatively small and modern. Expanded reaches back much further, covering a far larger pool of sets, and maintains its own separate list of banned cards suited to that wider format.
It's purely a tournament concept
Format legality only governs sanctioned competitive play — at home or among friends, any group can agree to allow any cards from any era, since there's no format enforcement outside official tournaments.
Frequently asked questions
What does Standard legal mean in the Pokémon TCG?
A card is currently allowed in the Standard tournament format.
What's the difference between Standard and Expanded formats?
Standard uses a small recent rotation window; Expanded reaches back much further.
Does a card losing Standard legality affect casual play at home?
No, format legality only applies to sanctioned tournaments.