Tentacool is card #56 of 62 in Fossil (1999), a Common illustrated by Kagemaru Himeno. At about $1.48 it is the #60 most valuable card in the set. In a Fossil booster it turns up about once every 2 packs. It is one of 16 Tentacool cards printed so far.
1999Fossil
2002Legendary Collection
2003Aquapolis
2006Legend Maker
2010HS—Triumphant
2017Guardians Rising
2019Unbroken Bonds
2023151

















An ungraded Tentacool from Fossil sells for about $1.48. A PSA 10 is worth more, roughly $19.24 by our estimate, and a PSA 9 around $5.92.
It is a Common, and it shows up about once every 2 Fossil packs.
Kagemaru Himeno drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Fossil 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.