Tentacool is card #125 of 146 in Legends Awakened (2008), a Common illustrated by Atsuko Nishida. At about $4.99 it is the #96 most valuable card in the set. In a Legends Awakened booster it turns up about once every 11 packs. It is one of 16 Tentacool cards printed so far.
1999Fossil
2002Legendary Collection
2003Aquapolis
2006Legend Maker
2008Legends Awakened
2010HS—Triumphant
2017Guardians Rising
2019Unbroken Bonds

















See the full Legends Awakened card list
An ungraded Tentacool from Legends Awakened sells for about $4.99. A PSA 10 is worth more, roughly $39.92 by our estimate, and a PSA 9 around $13.97.
It is a Common, and it shows up about once every 11 Legends Awakened packs.
Atsuko Nishida drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Legends Awakened 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.