Walrein is Pokédex #365, generation 3 (Hoenn). Walrein is a Stage 2 Water Pokémon with 130 HP. The card lists level 51. The card says it evolves from Sealeo. In this catalog that name is Sealeo (#364).
Walrein sits at 39/123 in Mysterious Treasures, position 39 of 124. Before it is 38 Ursaring, and after it is 40 Whiscash. The set belongs to the Diamond & Pearl series. It was released on August 1, 2007. The printed size is 123. This checklist is longer, at 124 cards. The listed rarity is Rare.
Freeze-up is listed as Poké-Power. Once during your turn, when you play Walrein from your hand to evolve 1 of your Pokémon, you may flip 2 coins. If both are heads, discard 1 of the Defending Pokémon and all cards attached to it. (This doesn't count as a Knocked Out Pokémon.) The attack Ice Bind lists 70 damage. The cost is Water, Water, Colorless. If your opponent doesn't discard a card from his or her hand, the Defending Pokémon is now Paralyzed. Weakness is Metal +30. Retreat cost is 3. The flavor text reads "It shatters ice with its big tusks. Its thick blubber repels not only the cold, but also enemy attacks."
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. That card lists 120 HP, and this one lists 130 HP. The rarity there is Rare Holo, and here it is Rare. Ken Ikuji illustrated that card, and Midori Harada illustrated this one. Retreat cost there is 2, and here it is 3. 12 other cards of Walrein list a different HP.
The illustrator line reads Midori Harada. I count 352 other cards in the catalog with that illustrator.
Mysterious Treasures set binder is where a full Mysterious Treasures 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.
Once during your turn, when you play Walrein from your hand to evolve 1 of your Pokémon, you may flip 2 coins. If both are heads, discard 1 of the Defending Pokémon and all cards attached to it. (This doesn't count as a Knocked Out Pokémon.)
If your opponent doesn't discard a card from his or her hand, the Defending Pokémon is now Paralyzed.
It shatters ice with its big tusks. Its thick blubber repels not only the cold, but also enemy attacks.
Mysterious Treasures, in the Diamond & Pearl series. It was released on August 1, 2007. The printed size is 123.
39/123. It is entry 39 of 124 in this checklist.
Midori Harada. The catalog lists 352 other cards with that illustrator.
Rare.
Walrein #365, generation 3 (Hoenn).
Ice Bind (70).