How much is Tentacool worth?

A raw (ungraded) Tentacool from Undone Seal is currently worth approximately $1.16 based on recent sales. A PSA 10 graded copy is valued at $70. PSA 9 copies average $0.99. Prices are based on completed sales across eBay, Goldin, and other marketplaces.

What is the PSA 10 price for Tentacool?

A PSA 10 graded Tentacool is currently valued at approximately $70 based on recent sales data.

What set is Tentacool from?

Tentacool is from the Undone Seal set, card number 20.

Where can I buy Tentacool?

Tentacool listings from eBay, Goldin, and other marketplaces are tracked in real time on CardIndex at https://www.cardindex.co.

Listings

Analytics

Volume Market Trends Trending Cards

Listings

Pokemon

Cards Sets

Analytics

Volume Market Trends Trending Cards

Listings

Pokemon

Cards Sets

Analytics

Volume Market Trends Trending Cards

Watchlist My Collection

Card Details

Number#20

SetUndone Seal

Year2004

CardIndex

Cards
Sets
Listings
My Collection
Sign In
Sign Up

Tools

Card Watchlist
Value Checker
Cert Lookup

Company

About
Blog
Compare
Sitemap
Terms
Privacy

Mobile Apps

Get the CardIndex app for iPhone:

Download on theApp Store

As an eBay Partner Network affiliate, CardIndex earns from qualifying purchases made through links on this page, at no additional cost to you.

About Tentacool

Tentacool from the Undone Seal set (#20) is a Pokemon trading card released in 2004. Current fair market values for Tentacool are PSA 10: $70, PSA 9: $0.99, Raw: $1.16. The most recent PSA 10 sale was $70 on May 20, 2026. A raw (ungraded) copy last sold for $1.16 on March 10, 2026. CardIndex has tracked 3 total sales across all grades for this card.