Onix-GX is card #36 of 68 in Hidden Fates (2019), a Rare Holo GX illustrated by PLANETA Igarashi. At about $2.52 it is the #16 most valuable card in the set. In a Hidden Fates booster it turns up about once every 76 packs. It is one of 31 Onix cards printed so far.
1999Base Set
2002Legendary Collection
2004Team Rocket Returns
2008Stormfront
2013Plasma Freeze
2019Hidden Fates
2022Pokémon GO
2026Delta Reign

















See the full Hidden Fates card list
An ungraded Onix-GX from Hidden Fates sells for about $2.52. A PSA 10 is worth more, roughly $12.60 by our estimate, and a PSA 9 around $5.80.
It is a Rare Holo GX, and it shows up about once every 76 Hidden Fates packs.
PLANETA Igarashi drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Hidden Fates booster packs in your browser with the set's real pull rates and keep what you pull in a digital binder. No real cards, nothing to buy.