Description, catalog fields, rules text, and how it plays—in one place.
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Abilities, attacks, weakness & resistance
Flip a coin. If heads, this attack does 10 damage to each Benched Pokémon (including your own). (Don't apply Weakness and Resistance for Benched Pokémon.)
Other cards from Gym Challenge
Water Energy (Unlimited)
Water Energy (First Edition)
Psychic Energy (Unlimited)
Psychic Energy (First Edition)
Lightning Energy (Unlimited)
Lightning Energy (First Edition)
Grass Energy (Unlimited)
Grass Energy (First Edition)
Fire Energy (Unlimited)
Fire Energy (First Edition)
Fighting Energy (Unlimited)
Fighting Energy (First Edition)
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Koga's Koffing (Gym Challenge 79/132) is a Basic Pokémon card illustrated by Ken Sugimori from the Gym Challenge set. Its sole attack, Smelly Gas, costs one Grass energy and on a successful coin flip deals 10 damage to the Defending Pokémon and—if heads—10 damage to each Benched Pokémon as well. The card has a Psychic weakness, a one Colorless retreat cost, and is printed in the Unlimited variant.
Catalog pricing data as of 21 Apr 2026, 09:19