Always open for suggestions and contrib.
The card pool defines which cards are legal in this format. It starts with a search query against all cards in the game, then optional include/ban lists refine the result.
format:base-fossil (type:stage2 OR type:stage1 OR type:basic OR type:basic-energy) NOT has:errata Validation filters are extra deck-building rules beyond the card pool. They restrict which decks are legal — for example, limiting the number of cards of a certain type, enforcing a star budget, or requiring a specific theme deck.
Cards matching: type:trainer
Allowed in deck: at most 6
Cards matching: has:errata
Allowed in deck: exactly 0
Cards matching: type:special-energy
Allowed in deck: 0–1
Cards matching: type:basic
Allowed in deck: at least 6
Rule: basic pokemon