Gastly is card #63 of 102 in HS—Triumphant (2010), a Common illustrated by Takashi Yamaguchi. At about $32.57 it is the #22 most valuable card in the set. In a HS—Triumphant booster it turns up about once every 5 packs. It is one of 35 Gastly cards printed so far.
1999Base Set
2003Skyridge
2007Diamond & Pearl
2010HS—Triumphant
2016Generations
2020Sword & Shield
2023151
2026Perfect Order

















See the full HS—Triumphant card list
An ungraded Gastly from HS—Triumphant sells for about $32.57. A PSA 10 is worth more, roughly $261 by our estimate, and a PSA 9 around $91.20.
It is a Common, and it shows up about once every 5 HS—Triumphant packs.
Takashi Yamaguchi 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.