AttackPower Blow
Does 10 damage plus 10 more damage for each Energy attached to Team Aqua's Walrein.

Team Magma vs Team Aqua is a set in the EX series. It was released on March 1, 2004. The printed size is 95. This checklist is longer, at 97 cards. Team Aqua's Walrein is 6/95, in position 6 of 97 on this checklist. Before it is 5 Team Aqua's Sharpedo, and after it is 7 Team Magma's Aggron. The listed rarity is Rare Holo.
Team Aqua's Walrein is a Stage 2 Water Darkness Pokémon with 120 HP. In the Pokédex this is Walrein (#365), generation 3 (Hoenn). The card says it evolves from Team Aqua's Sealeo. In this catalog that name is Sealeo (#364).
Ken Ikuji illustrated this card. The same name is on 16 other cards in the catalog.
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 Walrein 15/101 in Hidden Legends (2004). That card is named Walrein, while this one is Team Aqua's Walrein. Both list 120 HP. Both list the rarity Rare Holo. Atsuko Nishida illustrated that card, and Ken Ikuji illustrated this one. Retreat cost there is 3, and here it is 2. 11 other cards of Walrein list a different HP.
The attack Power Blow lists 10+ damage. The cost is Water. Does 10 damage plus 10 more damage for each Energy attached to Team Aqua's Walrein. Hydro Reverse is another attack lists 50+ damage. The cost is Water, Water, Colorless, Colorless. You may return any number of basic Water Energy cards attached to all of your Pokémon to your hand. If you do, this attack does 50 damage plus 10 more damage for each Energy you returned. Weakness is Fighting ×2 and Metal ×2. Retreat cost is 2. The card text says: This Pokémon is both Water Darkness type.
I keep a set binder for Team Magma vs Team Aqua, meant to hold every card of that set. This card is one slot in the Team Magma vs Team Aqua set binder. A generation binder holds one card of each species. Walrein can fill a slot in Generation 3 binder (Hoenn). Themed lists that include this exact card are Trainer's Pokémon and Team Aqua and Team Magma. I still need this card.
Does 10 damage plus 10 more damage for each Energy attached to Team Aqua's Walrein.
You may return any number of basic Water Energy cards attached to all of your Pokémon to your hand. If you do, this attack does 50 damage plus 10 more damage for each Energy you returned.
This Pokémon is both Water Darkness type.
Team Magma vs Team Aqua, in the EX series. It was released on March 1, 2004. The printed size is 95.
6/95. It is entry 6 of 97 in this checklist.
Ken Ikuji. The catalog lists 16 other cards with that illustrator.
Rare Holo.
Walrein #365, generation 3 (Hoenn).
Power Blow (10+) and Hydro Reverse (50+).