Kart No / Nadirlik: 56/102 / Common

Tip / HP / Evrim: Fighting / 90 / Basic

Atak 1: [F] Rock Throw (10)

Atak 2: [FF] Harden — During 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.)

Zayıflık / Direnç / Geri Çekilme: Grass×2 / — / 3

İllüstratör: Ken Sugimori

As it grows, the stone portions of its body harden to become similar to a diamond, though colored black.