Walrein ex is card #99 of 108 in Power Keepers (2007), a Rare Holo EX illustrated by Ryo Ueda. At about $49.20 it is the #17 most valuable card in the set. In a Power Keepers booster it turns up about once every 64 packs. It is one of 13 Walrein cards printed so far.
2004Team Magma vs Team Aqua
2006Legend Maker
2007Power Keepers
2009Rising Rivals
2012Dragons Exalted
2014Flashfire
2015Double Crisis
2021Chilling Reign

















See the full Power Keepers card list
An ungraded Walrein ex from Power Keepers sells for about $49.20. A PSA 10 is worth more, roughly $394 by our estimate, and a PSA 9 around $138.
It is a Rare Holo EX, and it shows up about once every 64 Power Keepers packs.
Ryo Ueda drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Power Keepers 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.