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, the Defending Pokémon is now Paralyzed.
If your opponent has any Benched Pokémon, choose up to 2 of them. This attack does 20 damage to each of them. (Don't apply Weakness and Resistance for Benched Pokémon.) Brock's Onix can't attack during your next turn.
Other cards from Gym Heroes
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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Brock's Onix (Gym 21, Unlimited) is a Basic Fighting-type Pokémon from the Gym Heroes set illustrated by Benimaru Itoh. Its attacks are Bind which can Paralyze with a coin flip and Tunneling which deals 20 damage to up to two of the opponent's Benched Pokémon but prevents Onix from attacking next turn. The card has Grass ×2 weakness and a two-colorless retreat cost, making it a bulky attacker with bench-targeting utility.
Catalog pricing data as of 16 Apr 2026, 23:17