For more information on this Pokémon's species, see Onix.
Brock's Onix (Japanese: タケシのイワークTakeshi's Iwark) is a Fighting-type Basic Pokémon card. It is part of the Gym Heroes expansion.
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.