Koga's Arbok 025 - 1st Edition Gym Challenge - RareRarityRare Card TypePokmon Hit Points90 HP FormStage 1 Evolves from Koga's Ekans TypeGrass Grass Poison Buildup Koga's Arbok is now Poisoned. Grass,Grass Poison Power (20) If Koga's Arbok is Poisoned, this attack's base damage is 40 instead of 20 and the Defending Pokmon is now Poisoned. Weakness Psychic 2 Retreat CostColorless Retreat CostColorless ArtistKen Sugimori