Tentacool is card #72 of 165 in 151 (2023), a Common illustrated by miki kudo. At about $0.29 it is the #182 most valuable card in the set. In a 151 booster it turns up about once every 15 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 151 sells for about $0.29. A PSA 10 is worth more, roughly $1.01 by our estimate, and a PSA 9 around $0.58.
It is a Common, and it shows up about once every 15 151 packs.
miki kudo drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open 151 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.