AttackFin Slap
If an attack damaged Horsea during your opponent's last turn, this attack does 20 damage plus 10 more damage. If not, this attack does 20 damage.

Neo Genesis is a set in the Neo series. It was released on December 16, 2000. The printed size is 111, and the checklist is the same length. Horsea is 62/111, in position 62 of 111 on this checklist. Before it is 61 Hoppip, and after it is 63 Ledyba. The listed rarity is Common.
Horsea is a Basic Water Pokémon with 50 HP. The card lists level 22. In the Pokédex this is Horsea (#116), generation 1 (Kanto). The card lists Seadra, Seadra (#117) under evolves to.
Miki Tanaka illustrated this card. The same name is on 192 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 50 HP. Both list the rarity Common. Mitsuhiro Arita illustrated that card, and Miki Tanaka illustrated this one. 18 other cards of Horsea list a different HP.
The attack Fin Slap lists 20+ damage. The cost is Water, Water. If an attack damaged Horsea during your opponent's last turn, this attack does 20 damage plus 10 more damage. If not, this attack does 20 damage. Weakness is Lightning ×2. The flavor text reads "If attacked by a larger enemy, it quickly swims to safety by adeptly controlling its dorsal fin."
I keep a set binder for Neo Genesis, meant to hold every card of that set. This card is one slot in the Neo Genesis 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.
If an attack damaged Horsea during your opponent's last turn, this attack does 20 damage plus 10 more damage. If not, this attack does 20 damage.
If attacked by a larger enemy, it quickly swims to safety by adeptly controlling its dorsal fin.
Neo Genesis, in the Neo series. It was released on December 16, 2000. The printed size is 111.
62/111. It is entry 62 of 111 in this checklist.
Miki Tanaka. The catalog lists 192 other cards with that illustrator.
Common.
Horsea #116, generation 1 (Kanto).
Fin Slap (20+).