Gengar is Pokédex #094, generation 1 (Kanto). Gengar LV.X is a Level-Up Psychic Pokémon with 140 HP. The card lists level X. The card says it evolves from Gengar. In this catalog that name is Gengar (#094).
Gengar LV.X sits at 97/99 in Arceus, position 97 of 111. Before it is 96 Arceus LV.X, and after it is 98 Salamence LV.X. The set belongs to the Platinum series. It was released on November 4, 2009. The printed size is 99. This checklist is longer, at 111 cards. The listed rarity is Rare Holo LV.X.
Level-Down is listed as Poké-Power. Once during your turn (before your attack), you may choose 1 of your opponent's Pokémon LV.X. Remove the Level-Up card from that Pokémon and have your opponent shuffle that card into his or her deck. The power can't be used if Gengar is affected by a Special Condition. The attack Compound Pain lists no damage number. The cost is Psychic, Psychic, Colorless. This attack does 30 damage to each of your opponent's Pokémon that already has any damage counters on it. (Don't apply Weakness and Resistance for Benched Pokémon.) Weakness is Darkness ×2. Resistance is Colorless -20. The card text says: Put this card onto your Active Gengar. Gengar LV.X can use any attack, Poké-Power, or Poké-Body from its previous level.
Gengar (#094) has 52 other cards in the catalog. Those other cards are in 35 sets. The other printings with a release date run from 1999 to 2026. The earliest other card is Gengar 5/62 in Fossil (1999). That card is named Gengar, while this one is Gengar LV.X. That card lists 80 HP, and this one lists 140 HP. The rarity there is Rare Holo, and here it is Rare Holo LV.X. Keiji Kinebuchi illustrated that card, and Shizurow illustrated this one. 52 other cards of Gengar list a different HP.
The illustrator line reads Shizurow. I count 79 other cards in the catalog with that illustrator.
Arceus set binder is where a full Arceus set goes. This card fills one slot there. A generation binder holds one card of each species. Gengar can fill a slot in Generation 1 binder (Kanto). Themed lists that include this exact card are Gengar and the Gastly line and Pokémon LV.X. I still need this card.
Once during your turn (before your attack), you may choose 1 of your opponent's Pokémon LV.X. Remove the Level-Up card from that Pokémon and have your opponent shuffle that card into his or her deck. The power can't be used if Gengar is affected by a Special Condition.
This attack does 30 damage to each of your opponent's Pokémon that already has any damage counters on it. (Don't apply Weakness and Resistance for Benched Pokémon.)
Put this card onto your Active Gengar. Gengar LV.X can use any attack, Poké-Power, or Poké-Body from its previous level.
Arceus, in the Platinum series. It was released on November 4, 2009. The printed size is 99.
97/99. It is entry 97 of 111 in this checklist.
Shizurow. The catalog lists 79 other cards with that illustrator.
Rare Holo LV.X.
Gengar #094, generation 1 (Kanto).
Compound Pain.