Koga Gym Challenge Gym Heroes WOTC Trainer Rare Japanese Pokemon Card NM Koga Pokemon Card Japanese Nintendo Game Rare GYM eBay The Poisonous Ninja Master Koga has such an interesting history compared to many of the named characters from Kanto. From his role as a gym leader then moving up to the 2000 Nintendo Pokemon Gym Challenge Koga's Ninja Trick 1St Edition PSA CardFacts Kogas Pidgey Pokemon card Mercari