AttackFin Smack
Flip 2 coins. This attack does 10 damage times the number of heads.

Plasma Freeze is a set in the Black & White series. It was released on May 8, 2013. The printed size is 116. This checklist is longer, at 122 cards. Horsea is 18/116, in position 18 of 122 on this checklist. Before it is 17 Reshiram, and after it is 19 Seadra. The listed rarity is Common.
Horsea is a Basic Water Pokémon with 60 HP. In the Pokédex this is Horsea (#116), generation 1 (Kanto). The card lists Seadra, Seadra (#117) under evolves to.
Midori Harada illustrated this card. The same name is on 352 other cards in the catalog.
Horsea (#116) has 27 other cards in the catalog. Those other cards are in 22 sets. The other printings with a release date run from 1999 to 2024. The earliest other card is Horsea 49/62 in Fossil (1999). That card lists 40 HP, and this one lists 60 HP. Both list the rarity Common. Mitsuhiro Arita illustrated that card, and Midori Harada illustrated this one. 18 other cards of Horsea list a different HP.
The attack Fin Smack lists 10× damage. The cost is Water. Flip 2 coins. This attack does 10 damage times the number of heads. Weakness is Lightning ×2. Retreat cost is 1. The flavor text reads "It makes its nest in the shade of corals. If it senses danger, it spits murky ink and flees."
I keep a set binder for Plasma Freeze, meant to hold every card of that set. This card is one slot in the Plasma Freeze set binder. A generation binder holds one card of each species. Horsea can fill a slot in Generation 1 binder (Kanto). I still need this card.
Flip 2 coins. This attack does 10 damage times the number of heads.
It makes its nest in the shade of corals. If it senses danger, it spits murky ink and flees.
Plasma Freeze, in the Black & White series. It was released on May 8, 2013. The printed size is 116.
18/116. It is entry 18 of 122 in this checklist.
Midori Harada. The catalog lists 352 other cards with that illustrator.
Common.
Horsea #116, generation 1 (Kanto).
Fin Smack (10×).