Unown Pokémon
Beginning with the Diamond & Pearl expansion, Unown cards use Unown A, Unown B, etc., as Pokémon
names, allowing players to use up to 4 of each in a deck. Older Unown cards are unaffected by this
change, so those cards are still restricted by the 4‐per‐deck rule, regardless of which version of Unown
they are. (For example, a player’s deck may contain 4 older Unown, 4 Unown A, and 4 Unown B.) If a
card refers to “an Unown card,” it refers to any Unown, regardless of name.