AttackLightning Flash
If the Defending Pokémon tries to attack during your opponent's next turn, your opponent flips a coin. If tails, that attack does nothing.

Team Rocket is a set in the Base series. It was released on April 24, 2000. The printed size is 82. This checklist is longer, at 83 cards. Dark Jolteon is 38/82, in position 38 of 83 on this checklist. Before it is 37 Dark Golduck, and after it is 39 Dark Kadabra. The listed rarity is Uncommon.
Dark Jolteon is a Stage 1 Lightning Pokémon with 50 HP. The card lists level 23. In the Pokédex this is Jolteon (#135), generation 1 (Kanto). The card says it evolves from Eevee. In this catalog that name is Eevee (#133).
Mitsuhiro Arita illustrated this card. The same name is on 721 other cards in the catalog.
Jolteon (#135) has 38 other cards in the catalog. Those other cards are in 28 sets. The other printings with a release date run from 1999 to 2025. The earliest other card is Jolteon 4/64 in Jungle (1999). That card is named Jolteon, while this one is Dark Jolteon. That card lists 70 HP, and this one lists 50 HP. The rarity there is Rare Holo, and here it is Uncommon. Kagemaru Himeno illustrated that card, and Mitsuhiro Arita illustrated this one. 38 other cards of Jolteon list a different HP.
The attack Lightning Flash lists 20 damage. The cost is Lightning. If the Defending Pokémon tries to attack during your opponent's next turn, your opponent flips a coin. If tails, that attack does nothing. Thunder Attack is another attack lists 30 damage. The cost is Lightning, Lightning, Colorless. Flip a coin. If heads, the Defending Pokémon is now Paralyzed. If tails, Dark Jolteon does 10 damage to itself. Weakness is Fighting ×2. Retreat cost is 1. The flavor text reads "A dangerous Pokémon when angered. It likes to playfully shock people with the electricity it stores within its body."
I keep a set binder for Team Rocket, meant to hold every card of that set. This card is one slot in the Team Rocket set binder. A generation binder holds one card of each species. Jolteon can fill a slot in Generation 1 binder (Kanto). Themed lists that include this exact card are Eevee and the Eeveelutions, Mitsuhiro Arita cards, and Team Rocket cards. I still need this card.
If the Defending Pokémon tries to attack during your opponent's next turn, your opponent flips a coin. If tails, that attack does nothing.
Flip a coin. If heads, the Defending Pokémon is now Paralyzed. If tails, Dark Jolteon does 10 damage to itself.
A dangerous Pokémon when angered. It likes to playfully shock people with the electricity it stores within its body.
Team Rocket, in the Base series. It was released on April 24, 2000. The printed size is 82.
38/82. It is entry 38 of 83 in this checklist.
Mitsuhiro Arita. The catalog lists 721 other cards with that illustrator.
Uncommon.
Jolteon #135, generation 1 (Kanto).
Lightning Flash (20) and Thunder Attack (30).