Pokémon cards have been printed in English since 1999. Besides the first set (Base Set), every set has an expansion symbol which identifies cards from that set. On cards printed before the Expedition Base Set (2002), the expansion symbol is located in the center-right of the card, just below the illustration.

Pokémon-e: Expedition Base Set (Japanese: 基本拡張パック Base Expansion Pack) is the name given to the first main expansion of cards from the e-Card Series of the Pokémon Trading Card Game (the e-Card Era in Japan). More electrifying than ever! The Pokémon® trading card game is going where no trading card game has ever gone before—the Game Boy Advance™.

Besides the first set (Base Set), every set has an expansion symbol which identifies cards from that set. On cards printed before the Expedition Base Set (2002), the expansion symbol is located in the center-right of the card, just below the illustration. Since Expedition Base Set, most cards have an expansion symbol in the bottom right corner.

This set was the first set to be adapted into English by Pokémon USA, Inc. after the card game's rights transferred back from Wizards of the Coast. Its symbol is a jewel with a brilliant cut, viewed from above. It is named after the video games Pokémon Ruby and Sapphire.