AttackDual Splash
Choose 2 of your opponent's Pokémon. This attack does 30 damage to each of them. (Don't apply Weakness and Resistance for Benched Pokémon.)

Majestic Dawn is a set in the Diamond & Pearl series. It was released on 1 May 2008. The printed size is 100, and the checklist is the same length. Empoleon is 17/100, in position 17 of 100 on this checklist. Before it is 16 Bronzong, and after it is 18 Espeon. The listed rarity is Rare.
Empoleon is a Stage 2 Water Pokémon with 130 HP. The card lists level 49. In the Pokédex this is Empoleon (#395), generation 4 (Sinnoh). The card says it evolves from Prinplup. In this catalog that name is Prinplup (#394).
Kent Kanetsuna illustrated this card. The same name is on 74 other cards in the catalog.
Empoleon (#395) has 22 other cards in the catalog. Those other cards are in 18 sets. The other printings with a release date run from 2007 to 2025. The earliest other card is Empoleon 4/130 in Diamond & Pearl (2007). Both list 130 HP. The rarity there is Rare Holo, and here it is Rare. Nakaoka illustrated that card, and Kent Kanetsuna illustrated this one. 19 other cards of Empoleon list a different HP.
The attack Dual Splash lists no damage number. The cost is Water, Colorless. Choose 2 of your opponent's Pokémon. This attack does 30 damage to each of them. (Don't apply Weakness and Resistance for Benched Pokémon.) Surf Together is another attack lists 50+ damage. The cost is Water, Water, Colorless. Does 50 damage plus 10 more damage for each of your Benched Pokémon. Flip a coin. If tails, this attack does 10 damage to each of your Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.) Weakness is Lightning +30. Retreat cost is 2. The flavor text reads "It swims as fast as a jet boat. The edges of its wings are sharp and can slice apart drifting ice."
I keep a set binder for Majestic Dawn, meant to hold every card of that set. This card is one slot in the Majestic Dawn set binder. A generation binder holds one card of each species. Empoleon can fill a slot in Generation 4 binder (Sinnoh). I still need this card.
Choose 2 of your opponent's Pokémon. This attack does 30 damage to each of them. (Don't apply Weakness and Resistance for Benched Pokémon.)
Does 50 damage plus 10 more damage for each of your Benched Pokémon. Flip a coin. If tails, this attack does 10 damage to each of your Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
It swims as fast as a jet boat. The edges of its wings are sharp and can slice apart drifting ice.
Majestic Dawn, in the Diamond & Pearl series. It was released on 1 May 2008. The printed size is 100.
17/100. It is entry 17 of 100 in this checklist.
Kent Kanetsuna. The catalog lists 74 other cards with that illustrator.
Rare.
Empoleon #395, generation 4 (Sinnoh).
Dual Splash and Surf Together (50+).