Walrein is Pokédex #365, generation 3 (Hoenn). Walrein is a Stage 2 Water Pokémon with 120 HP. The card says it evolves from Sealeo. In this catalog that name is Sealeo (#364).
Walrein sits at 15/101 in Hidden Legends, position 15 of 102. Before it is 14 Shiftry, and after it is 16 Bellossom. The set belongs to the EX series. It was released on June 1, 2004. The printed size is 101. This checklist is longer, at 102 cards. The listed rarity is Rare Holo.
Crush Draw is listed as Poké-Power. Once during your turn (before your attack), you may reveal the top card of your deck. If that card is a basic Energy card, attach it to 1 of your Pokémon. If not, put the card back on your deck. This power can't be used if Walrein is affected by a Special Condition. The attack Sheer Cold lists 50 damage. The cost is Water, Water, Colorless. Flip a coin. If heads, each Defending Pokémon can't attack during your opponent's next turn. Weakness is Metal ×2. Retreat cost is 3.
Walrein (#365) has 12 other cards in the catalog. Those other cards are in 12 sets. The other printings with a release date run from 2004 to 2024. The earliest other card is Team Aqua's Walrein 6/95 in Team Magma vs Team Aqua (2004). That card is named Team Aqua's Walrein, while this one is Walrein. Both list 120 HP. Both list the rarity Rare Holo. Ken Ikuji illustrated that card, and Atsuko Nishida illustrated this one. Retreat cost there is 2, and here it is 3. 11 other cards of Walrein list a different HP.
The illustrator line reads Atsuko Nishida. I count 408 other cards in the catalog with that illustrator.
Hidden Legends set binder is where a full Hidden Legends set goes. This card fills one slot there. A generation binder holds one card of each species. Walrein can fill a slot in Generation 3 binder (Hoenn). I still need this card.