Tentacool is card #66 of 92 in Legend Maker (2006), a Common illustrated by Tomoaki Imakuni. At about $31.49 it is the #51 most valuable card in the set. In a Legend Maker booster it turns up about once every 5 packs. It is one of 16 Tentacool cards printed so far.
1999Fossil
2002Legendary Collection
2003Aquapolis
2006Legend Maker
2010HS—Triumphant
2017Guardians Rising
2019Unbroken Bonds
2023151

















See the full Legend Maker card list
An ungraded Tentacool from Legend Maker sells for about $31.49. A PSA 10 is worth more, roughly $409 by our estimate, and a PSA 9 around $126.
It is a Common, and it shows up about once every 5 Legend Maker packs.
Tomoaki Imakuni drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Legend Maker 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.