A Stage 1 Pokemon Card of type Grass with the title Koga's Arbok and 90 HP of rarity Rare evolved from Koga's Ekans from the set Gym Challenge.  It has the attack Poison Buildup with the cost Grass, the energy cost 1 with the description: Koga's Arbok is now Poisoned. It has the attack Poison Power with the cost Grass, Grass, the energy cost 2 and the damage of 20 with the description: If Koga's Arbok is Poisoned, this attack's base damage is 40 instead of 20 and the Defending Pokemon is now Poisoned. It has weakness against Psychic 2. 
Koga's Arbok