Gym Heroes is a set in the Gym series. It was released on August 14, 2000. The printed size is 132, and the checklist is the same length. Misty's Tentacruel is 10/132, in position 10 of 132 on this checklist. Before it is 9 Misty's Seadra, and after it is 11 Rocket's Hitmonchan. The listed rarity is Rare Holo.
Misty's Tentacruel is a Stage 1 Water Pokémon with 70 HP. The card lists level 30. In the Pokédex this is Tentacruel (#073), generation 1 (Kanto). The card says it evolves from Misty's Tentacool. In this catalog that name is Tentacool (#072).
Ken Sugimori illustrated this card. The same name is on 1,112 other cards in the catalog.
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 1999 to 2023. The earliest other card is Tentacruel 44/62 in Fossil (1999). That card is named Tentacruel, while this one is Misty's Tentacruel. That card lists 60 HP, and this one lists 70 HP. The rarity there is Uncommon, and here it is Rare Holo. Kagemaru Himeno illustrated that card, and Ken Sugimori illustrated this one. 11 other cards of Tentacruel list a different HP.
Flee is listed as Pokémon Power. If an attack does damage to Misty's Tentacruel while it's your Active Pokémon, you may switch it with 1 of your Benched Pokémon, which prevents all other effects of that attack on Misty's Tentacruel. This power can't be used if Misty's Tentacruel is already Asleep, Confused, or Paralyzed. The attack Jellyfish Poison lists 30 damage. The cost is Water, Water, Colorless, Colorless. Flip a coin. If heads, the Defending Pokémon is now Poisoned. If tails, the Defending Pokémon is now Confused. Weakness is Lightning ×2.
I keep a set binder for Gym Heroes, meant to hold every card of that set. This card is one slot in the Gym Heroes set binder. A generation binder holds one card of each species. Tentacruel can fill a slot in Generation 1 binder (Kanto). Themed lists that include this exact card are Trainer's Pokémon, Kanto Gym Leaders and their Pokémon, and Misty and her Pokémon. I still need this card.
If an attack does damage to Misty's Tentacruel while it's your Active Pokémon, you may switch it with 1 of your Benched Pokémon, which prevents all other effects of that attack on Misty's Tentacruel. This power can't be used if Misty's Tentacruel is already Asleep, Confused, or Paralyzed.
Flip a coin. If heads, the Defending Pokémon is now Poisoned. If tails, the Defending Pokémon is now Confused.
Gym Heroes, in the Gym series. It was released on August 14, 2000. The printed size is 132.
10/132. It is entry 10 of 132 in this checklist.
Ken Sugimori. The catalog lists 1,112 other cards with that illustrator.
Rare Holo.
Tentacruel #073, generation 1 (Kanto).
Jellyfish Poison (30).