Ruby & Sapphire is a Pokémon expansion with set code ex1. The Trademeup catalog tracks 112 cards from this set. Release date: Jul 1, 2003. Singles from this set currently range from €0.04 to €215.08. The most expensive card tracked right now is Mewtwo ex at €215.08. Expansions released around the same time: Rulers of the Heavens and Movie Commemoration VS Pack.
