The GS Ball is a mysterious Pokéball that Professor Oak has Ash Ketchum go get for him in the anime. After winning the Orange League, Ash returned the ball to Prof. Oak so he could do research on the mysterious Pokéball. Despite his best efforts, Prof. Oak was unable to learn anything about it and sent Ash to see Kurt of Azelea Town in the Johto region. To this day, there still isn't much known about the GS Ball and a great deal of mystery still surrounds it.
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