AttackHydrocannon
Does 30 damage plus 20 more damage for each Water Energy attached to Dark Blastoise but not used to pay for this attack. You can't add more than 40 damage in this way.

Blastoise is Pokédex #009, generation 1 (Kanto). Dark Blastoise is a Stage 2 Water Pokémon with 70 HP. The card lists level 28. The card says it evolves from Dark Wartortle. In this catalog that name is Wartortle (#008).
Dark Blastoise sits at 20/82 in Team Rocket, position 20 of 83. Before it is 19 Dark Arbok, and after it is 21 Dark Charizard. The set belongs to the Base series. It was released on April 24, 2000. The printed size is 82. This checklist is longer, at 83 cards. The listed rarity is Rare.
The attack Hydrocannon lists 30+ damage. The cost is Water, Water. Does 30 damage plus 20 more damage for each Water Energy attached to Dark Blastoise but not used to pay for this attack. You can't add more than 40 damage in this way. Rocket Tackle is another attack lists 40 damage. The cost is Water, Colorless, Colorless. Dark Blastoise does 10 damage to itself. Flip a coin. If heads, prevent all damage done to Dark Blastoise during your opponent's next turn. (Any other effects of attacks still happen.) Weakness is Lightning ×2. Retreat cost is 2. The flavor text reads "An aggressive Pokémon that tackles anything it sees."
Blastoise (#009) has 44 other cards in the catalog. Those other cards are in 27 sets. The other printings with a release date run from 1999 to 2024. The earliest other card is Blastoise 2/102 in Base (1999). That card is named Blastoise, while this one is Dark Blastoise. That card lists 100 HP, and this one lists 70 HP. The rarity there is Rare Holo, and here it is Rare. Ken Sugimori illustrated that card, and Mitsuhiro Arita illustrated this one. Retreat cost there is 3, and here it is 2. 42 other cards of Blastoise list a different HP.
The illustrator line reads Mitsuhiro Arita. I count 721 other cards in the catalog with that illustrator.
Team Rocket set binder is where a full Team Rocket set goes. This card fills one slot there. A generation binder holds one card of each species. Blastoise can fill a slot in Generation 1 binder (Kanto). Themed lists that include this exact card are Mitsuhiro Arita cards and Team Rocket cards. I still need this card.
Does 30 damage plus 20 more damage for each Water Energy attached to Dark Blastoise but not used to pay for this attack. You can't add more than 40 damage in this way.
Dark Blastoise does 10 damage to itself. Flip a coin. If heads, prevent all damage done to Dark Blastoise during your opponent's next turn. (Any other effects of attacks still happen.)
An aggressive Pokémon that tackles anything it sees.
Team Rocket, in the Base series. It was released on April 24, 2000. The printed size is 82.
20/82. It is entry 20 of 83 in this checklist.
Mitsuhiro Arita. The catalog lists 721 other cards with that illustrator.
Rare.
Blastoise #009, generation 1 (Kanto).
Hydrocannon (30+) and Rocket Tackle (40).