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As it grows, the stone portions of its body harden to become similar to a diamond, though colored black.
Abilities, attacks, weakness & resistance
During your opponent's next turn, whenever 30 or less damage is done to Onix (after applying Weakness and Resistance), prevent that damage. (Any other effects of attacks still happen.)
Other cards from Base Set 2
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Onix (Base Set 2 #84) is a Basic Fighting-type Pokémon card with a common rarity and three retreat costs. It has a 1-cost Rock Throw dealing 10 damage and a Harden attack that, for two Fighting energy, prevents up to 30 damage to Onix during your opponent's next turn. The card's flavor notes describe its body hardening like diamond as it grows, and it carries a Grass ×2 weakness.
Catalog pricing data as of 25 Apr 2026, 22:41
