AttackSupersonic
Flip a coin. If heads, the Defending Pokémon is now Confused.

Tentacruel is Pokédex #073, generation 1 (Kanto). Tentacruel is a Stage 1 Water Pokémon with 60 HP. The card lists level 21. The card says it evolves from Tentacool. In this catalog that name is Tentacool (#072).
Tentacruel sits at 44/62 in Fossil, position 44 of 62. Before it is 43 Slowbro, and after it is 45 Weezing. The set belongs to the Base series. It was released on October 10, 1999. The printed size is 62, and the checklist is the same length. The listed rarity is Uncommon.
The attack Supersonic lists no damage number. The cost is Water. Flip a coin. If heads, the Defending Pokémon is now Confused. Jellyfish Sting is another attack lists 10 damage. The cost is Water, Water. The Defending Pokémon is now Poisoned. Weakness is Lightning ×2. The flavor text reads "The tentacles are normally kept short. On hunts, they are extended to ensnare and immobilize prey."
Tentacruel (#073) has 15 other cards in the catalog. Those other cards are in 14 sets. The other printings with a release date run from 2000 to 2023. The earliest other card is Misty's Tentacruel 10/132 in Gym Heroes (2000). That card is named Misty's Tentacruel, while this one is Tentacruel. That card lists 70 HP, and this one lists 60 HP. The rarity there is Rare Holo, and here it is Uncommon. Ken Sugimori illustrated that card, and Kagemaru Himeno illustrated this one. 13 other cards of Tentacruel list a different HP.
The illustrator line reads Kagemaru Himeno. I count 656 other cards in the catalog with that illustrator.
Fossil set binder is where a full Fossil set goes. This card fills one slot there. A generation binder holds one card of each species. Tentacruel can fill a slot in Generation 1 binder (Kanto). I still need this card.
Flip a coin. If heads, the Defending Pokémon is now Confused.
The Defending Pokémon is now Poisoned.
The tentacles are normally kept short. On hunts, they are extended to ensnare and immobilize prey.
Fossil, in the Base series. It was released on October 10, 1999. The printed size is 62.
44/62. It is entry 44 of 62 in this checklist.
Kagemaru Himeno. The catalog lists 656 other cards with that illustrator.
Uncommon.
Tentacruel #073, generation 1 (Kanto).
Supersonic and Jellyfish Sting (10).