Pokémon Blue (Pocket Monsters Blue in Japan) is an updated version of Pokémon Red and Green. It is also the game used for the translation of the worldwide Generation I games. In Japan Pokemn Blue served as the third version of the origional Kanto games, with Yellow Pikachu Addition being a new game added to the set for modified gameplay and utilization of the full effect of the Gameboy Color. Pokemon Blue version was used as Red versions foreign release counterpart because the two have the same Pokemon battle sprites and pictures. Pokemon Green version which only saw release in Japan as the origional counterpart to Red Version has considerably more awkward battle sprites then the other two games. This poor graphic design is why Red version's depictions of the origional 150 were used for its updated release and why green version was never released to a wide audience.