AbilityUndevelop
Once during your turn (before your attack), you may devolve Jolteon and put Jolteon into your hand. This power can't be used if Jolteon is affected by a Special Condition.

Jolteon is Pokédex #135, generation 1 (Kanto). Jolteon is a Stage 1 Lightning Pokémon with 80 HP. The card lists level 43. The card says it evolves from Eevee. In this catalog that name is Eevee (#133).
Jolteon sits at 26/111 in Rising Rivals, position 26 of 120. Before it is 25 Hippowdon, and after it is 27 Mamoswine GL. The set belongs to the Platinum series. It was released on May 16, 2009. The printed size is 111. This checklist is longer, at 120 cards. The listed rarity is Rare.
Undevelop is listed as Poké-Power. Once during your turn (before your attack), you may devolve Jolteon and put Jolteon into your hand. This power can't be used if Jolteon is affected by a Special Condition. The attack Quick Attack lists 10+ damage. The cost is Colorless. Flip a coin. If heads, this attack does 10 damage plus 30 more damage. Evolving Thunder is another attack lists 50 damage. The cost is Lightning, Colorless. If Jolteon evolved from Eevee during this turn, this attack does 10 damage to each of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon). Weakness is Fighting +20. Resistance is Metal -20.
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 lists 70 HP, and this one lists 80 HP. The rarity there is Rare Holo, and here it is Rare. Kagemaru Himeno illustrated that card, and Hajime Kusajima illustrated this one. 35 other cards of Jolteon list a different HP.
The illustrator line reads Hajime Kusajima. I count 206 other cards in the catalog with that illustrator.
Rising Rivals set binder is where a full Rising Rivals set goes. This card fills one slot there. 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.
Once during your turn (before your attack), you may devolve Jolteon and put Jolteon into your hand. This power can't be used if Jolteon is affected by a Special Condition.
Flip a coin. If heads, this attack does 10 damage plus 30 more damage.
If Jolteon evolved from Eevee during this turn, this attack does 10 damage to each of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon).
Rising Rivals, in the Platinum series. It was released on May 16, 2009. The printed size is 111.
26/111. It is entry 26 of 120 in this checklist.
Hajime Kusajima. The catalog lists 206 other cards with that illustrator.
Rare.
Jolteon #135, generation 1 (Kanto).
Quick Attack (10+) and Evolving Thunder (50).