The Pokémon Company International releases four main expansions each year-typically in February, May, August, and November-in additional to an annual miniset that usually releases between August and October. The letters are the official Set Abbreviation-or the shorthand used to refer to a specific Set-also called an Expansion.
This is the most common way for players to specify which card they’re referring to when discussing their decks and the cards in them.
All throughout this guide, you’ll see a card name followed by a set of two to three letters and a number, like these examples below:
