Misty's Tentacruel is card #10 of 132 in Gym Heroes (2000), a Rare Holo illustrated by Ken Sugimori. At about $92.49 it is the #17 most valuable card in the set. In a Gym Heroes booster it turns up about once every 56 packs. It is one of 16 Tentacruel cards printed so far.
1999Fossil
2000Gym Heroes
2001Southern Islands
2003Aquapolis
2006Legend Maker
2008Legends Awakened
2015Primal Clash
2019Unbroken Bonds

















See the full Gym Heroes card list
An ungraded Misty's Tentacruel from Gym Heroes sells for about $92.49. A PSA 10 is worth more, roughly $1,202 by our estimate, and a PSA 9 around $370.
It is a Rare Holo, and it shows up about once every 56 Gym Heroes packs.
Ken Sugimori drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Gym Heroes 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.