They are the opposite of Phantom Pokemon which are the evil Pokemon in the RPG. Kryptonite Pokemon are trusted by Humans as they once saved a village from an attack, This attack was led by 'Phantom Zangoose', a strange but powerful Pokemon. The battle was ended by a trainer and his powerful Lucario. The Zangoose tragically destroyed the trainer's Lucario to end the battle. However, Lucario somehow made all of the shadow Pokemon dissapear upon his death.