More than 100 new Pokemon unique to the GS series.But there's not much in this edition that makes it a 'must buy' for folks who already own a copy or two of the previous editions. The final (hopefully) Game Boy Color edition is definitely the version to get if you aren't already one of the upteenth billion owners of Pokemon Red, Pokemon Blue, Pokemon Yellow, Pokemon Gold, or Pokemon Silver, with Crystal's slight updates to the design and graphics. It's the last hurrah for the engine we've known and loved for almost three years in the US, and more than five years since its inception overseas. To keep the Pokémon property going on the Game Boy Color, Nintendo has released Pokémon Crystal to US gamers, but without the element that Nintendo capitalized on in Japan.