Harden
Cost: Colorless
During your opponent's next turn, if Onix would be damaged by an attack, prevent that attack's damage done to Onix if that damage is 40 or less.

HP 90 · Fighting
Pokémon — Basic
Record the copies you own, place them in a binder, use the card in a deck, or save it to your wishlist.
TCGplayer market price via TCGdex, updated Nov 2, 2026. It is an estimate, not an offer. It does not change with the condition or the language of your copy.
Daily TCGplayer market price over the last 30 days.
Sign in to record the copies you own, place them in a binder or a box, use the card in a deck, or save it to your wishlist.
Cost: Colorless
During your opponent's next turn, if Onix would be damaged by an attack, prevent that attack's damage done to Onix if that damage is 40 or less.
Cost: Fighting, Colorless, Colorless
Flip a coin. If heads, the Defending Pokémon is now Paralyzed.