Description, catalog fields, rules text, and how it plays—in one place.
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Abilities, attacks, weakness & resistance
If your opponent has any Benched Pokémon, flip a coin. If heads, choose 1 of your opponent's Benched Pokémon and switch it with the Defending Pokémon. The new Defending Pokémon is now Poisoned.
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 Grimer (gym2-78) is a Basic Pokémon card from the Gym Challenge set featuring Grass type and common rarity. Its Sludge Grip attack can flip a coin to switch an opponent's Benched Pokémon into play and Poison it, while Sludge Toss deals 20 damage for two energy. The card has a single Colorless retreat cost and a Psychic weakness.
Catalog pricing data as of 29 Apr 2026, 09:05