AttackBlizzard
Flip a coin. If heads, this attack does 10 damage to each of your opponent's Benched Pokémon. If tails, this attack does 10 damage to each of your own Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

Dragonair is Pokédex #148, generation 1 (Kanto). Erika's Dragonair is a Stage 1 Colorless Pokémon with 80 HP. The card lists level 32. The card says it evolves from Erika's Dratini. In this catalog that name is Dratini (#147). The card lists Dragonite, Dragonite (#149) under evolves to.
Erika's Dragonair sits at 4/132 in Gym Heroes, position 4 of 132. Before it is 3 Erika's Clefable, and after it is 5 Erika's Vileplume. The set belongs to the Gym series. It was released on 14 August 2000. The printed size is 132, and the checklist is the same length. The listed rarity is Rare Holo.
The attack Blizzard lists 30 damage. The cost is Colorless, Colorless, Colorless. Flip a coin. If heads, this attack does 10 damage to each of your opponent's Benched Pokémon. If tails, this attack does 10 damage to each of your own Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.) Take Away is another attack lists no damage number. The cost is Colorless, Colorless, Colorless, Colorless. Shuffle Erika's Dragonair and all cards attached to it into your deck. Then, your opponent shuffles his or her Active Pokémon and all cards attached to it into his or her deck. Resistance is Psychic -30. Retreat cost is 2.
Dragonair (#148) has 28 other cards in the catalog. Those other cards are in 23 sets. The other printings with a release date run from 1999 to 2026. The earliest other card is Dragonair 18/102 in Base (1999). That card is named Dragonair, while this one is Erika's Dragonair. Both list 80 HP. The rarity there is Rare, and here it is Rare Holo. Mitsuhiro Arita illustrated that card, and Atsuko Nishida illustrated this one. 22 other cards of Dragonair list a different HP.
The illustrator line reads Atsuko Nishida. I count 408 other cards in the catalog with that illustrator.
Gym Heroes set binder is where a full Gym Heroes set goes. This card fills one slot there. A generation binder holds one card of each species. Dragonair can fill a slot in Generation 1 binder (Kanto). Themed lists that include this exact card are Trainer's Pokémon, Dratini, Dragonair, and Dragonite, Atsuko Nishida cards, early series, Kanto Gym Leaders and their Pokémon, and Erika and her Pokémon. I still need this card.
Flip a coin. If heads, this attack does 10 damage to each of your opponent's Benched Pokémon. If tails, this attack does 10 damage to each of your own Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
Shuffle Erika's Dragonair and all cards attached to it into your deck. Then, your opponent shuffles his or her Active Pokémon and all cards attached to it into his or her deck.
Gym Heroes, in the Gym series. It was released on 14 August 2000. The printed size is 132.
4/132. It is entry 4 of 132 in this checklist.
Atsuko Nishida. The catalog lists 408 other cards with that illustrator.
Rare Holo.
Dragonair #148, generation 1 (Kanto).
Blizzard (30) and Take Away.