AttackEnergy Cannon
Does 20 damage plus 10 more damage for each Energy attached to Seadra but not used to pay for this attack's Energy cost. You can't add more than 20 damage in this way.

Seadra is Pokédex #117, generation 1 (Kanto). Seadra is a Stage 1 Water Pokémon with 70 HP. The card says it evolves from Horsea. In this catalog that name is Horsea (#116). The card lists Kingdra, Kingdra (#230) under evolves to.
Seadra sits at 39/97 in Dragon, position 39 of 100. Before it is 38 Ninjask, and after it is 40 Seadra. The set belongs to the EX series. It was released on November 24, 2003. The printed size is 97. This checklist is longer, at 100 cards. The listed rarity is Uncommon.
The attack Energy Cannon lists 20+ damage. The cost is Water. Does 20 damage plus 10 more damage for each Energy attached to Seadra but not used to pay for this attack's Energy cost. You can't add more than 20 damage in this way. Water Arrow is another attack lists no damage number. The cost is Water, Colorless, Colorless. Choose 1 of your opponent's Pokémon. This attack does 30 damage to that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.) Weakness is Lightning ×2. Retreat cost is 1.
Seadra (#117) has 21 other cards in the catalog. Those other cards are in 20 sets. The other printings with a release date run from 1999 to 2024. The earliest other card is Seadra 42/62 in Fossil (1999). That card lists 60 HP, and this one lists 70 HP. Both list the rarity Uncommon. Ken Sugimori illustrated that card, and Hajime Kusajima illustrated this one. 13 other cards of Seadra list a different HP.
The illustrator line reads Hajime Kusajima. I count 206 other cards in the catalog with that illustrator.
Dragon set binder is where a full Dragon set goes. This card fills one slot there. A generation binder holds one card of each species. Seadra can fill a slot in Generation 1 binder (Kanto). I still need this card.
Does 20 damage plus 10 more damage for each Energy attached to Seadra but not used to pay for this attack's Energy cost. You can't add more than 20 damage in this way.
Choose 1 of your opponent's Pokémon. This attack does 30 damage to that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
Dragon, in the EX series. It was released on November 24, 2003. The printed size is 97.
39/97. It is entry 39 of 100 in this checklist.
Hajime Kusajima. The catalog lists 206 other cards with that illustrator.
Uncommon.
Seadra #117, generation 1 (Kanto).
Energy Cannon (20+) and Water Arrow.