Rarity: Common
HP: 50
Stage: Basic
Type: Water
Weakness: ×2
Retreat
Artist: Hisao Nakamura
Ability: Poké-BODY: FreefloatingIf Tentacool has no Energy attached to it, Tentacool's Retreat Cost is 0.
Attacks: Wrap
Flip a coin. If heads, the Defending Pokémon is now Paralyzed.

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Tentacool #020

Undone Seal · Common

Cardmarket lists Tentacool #020 at €1.39 (Near Mint).

Market prices

No pricing data available.

Updated Oct 20, 2026

Near Mint€1.39

Excellent€0.50

Good€0.30

Light Played€0.45

Played€0.20

Poor€0.20

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Date	Price	Grader	Grade	Link
Oct 7, 2026	$101.00	PSA	10	View
Sep 26, 2026	$1.60	—	—	View
Sep 22, 2026	$150.00	PSA	10	View
Sep 11, 2026	$3.84	—	—	View
Aug 17, 2026	$1.60	—	—	View
Aug 16, 2026	$3.48	—	—	View
Jun 7, 2026	$2.66	—	—	View
May 20, 2026	$70.00	PSA	10	View
May 9, 2026	$1.99	—	—	View
May 6, 2026	$0.99	CGC	9	View
May 2, 2026	$3.59	—	—	View
Mar 10, 2026	$1.16	—	—	View
Jan 1, 2025	$2.27	—	—	View

The top of Undone Seal by market price today.