Aggron is card #1 of 102 in HS—Triumphant (2010), a Rare Holo illustrated by Kagemaru Himeno. At about $9.96 it is the #56 most valuable card in the set. In a HS—Triumphant booster it turns up about once every 40 packs. It is one of 24 Aggron cards printed so far.
2003Ruby & Sapphire
2006Crystal Guardians
2009Rising Rivals
2010HS—Triumphant
2012Dragons Exalted
2017Crimson Invasion
2020Darkness Ablaze
2022Brilliant Stars

















See the full HS—Triumphant card list
An ungraded Aggron from HS—Triumphant sells for about $9.96. A PSA 10 is worth more, roughly $79.68 by our estimate, and a PSA 9 around $27.89.
It is a Rare Holo, and it shows up about once every 40 HS—Triumphant packs.
Kagemaru Himeno drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open HS—Triumphant 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.