AttackElectrobullet
This attack does 30 damage to 1 of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

SM Black Star Promos is a set in the Sun & Moon series. It was released on February 3, 2017. The printed size is 248. This checklist is longer, at 251 cards. Jolteon-GX is SM173/248, in position 176 of 251 on this checklist. Before it is SM172 Vaporeon-GX, and after it is SM174 Eevee-GX. The listed rarity is Promo.
Jolteon-GX is a Stage 1 GX Lightning Pokémon with 200 HP. 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).
PLANETA Otani illustrated this card. The same name is on 14 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 Jolteon-GX. That card lists 70 HP, and this one lists 200 HP. The rarity there is Rare Holo, and here it is Promo. Kagemaru Himeno illustrated that card, and PLANETA Otani illustrated this one. 38 other cards of Jolteon list a different HP.
The attack Electrobullet lists 30 damage. The cost is Lightning. This attack does 30 damage to 1 of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.) Head Bolt is another attack lists 110 damage. The cost is Lightning, Colorless. Swift Run-GX is another attack lists 110 damage. The cost is Lightning, Colorless. Prevent all effects of attacks, including damage, done to this Pokémon during your opponent's next turn. (You can't use more than 1 GX attack in a game.) Weakness is Fighting ×2. Resistance is Metal -20. The card text says: Pokémon-GX rule: When your Pokémon-GX is Knocked Out, your opponent takes 2 Prize cards.
I keep a set binder for SM Black Star Promos, meant to hold every card of that set. This card is one slot in the SM Black Star Promos 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. I still need this card.
This attack does 30 damage to 1 of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
Prevent all effects of attacks, including damage, done to this Pokémon during your opponent's next turn. (You can't use more than 1 GX attack in a game.)
Pokémon-GX rule: When your Pokémon-GX is Knocked Out, your opponent takes 2 Prize cards.
SM Black Star Promos, in the Sun & Moon series. It was released on February 3, 2017. The printed size is 248.
SM173/248. It is entry 176 of 251 in this checklist.
PLANETA Otani. The catalog lists 14 other cards with that illustrator.
Promo.
Jolteon #135, generation 1 (Kanto).
Electrobullet (30), Head Bolt (110), and Swift Run-GX (110).