Walrein is card #15 of 101 in Hidden Legends (2004), a Rare Holo illustrated by Atsuko Nishida. At about $19.29 it is the #66 most valuable card in the set. In a Hidden Legends booster it turns up about once every 45 packs. It is one of 13 Walrein cards printed so far.
2004Team Magma vs Team Aqua
2006Legend Maker
2009Rising Rivals
2012Dragons Exalted
2014Flashfire
2015Double Crisis
2021Chilling Reign
2024Surging Sparks

















See the full Hidden Legends card list
An ungraded Walrein from Hidden Legends sells for about $19.29. A PSA 10 is worth more, roughly $251 by our estimate, and a PSA 9 around $77.16.
It is a Rare Holo, and it shows up about once every 45 Hidden Legends packs.
Atsuko Nishida drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Hidden Legends 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.