Pokémon Red and Blue, along with Pokémon Green (Japan only), are the first Pokémon games ever released in America, Europe, and Australia. They are currently some of the best selling. The two games were released alongside each other, each containing minor differences. In the titles, the player longs to become the greatest Pokémon Trainer by capturing and raising species known as Pokémon. In the games there were 151 Pokémon that could be caught.