Darkrai is Pokédex #491, generation 4 (Sinnoh). Darkrai LV.X is a Level-Up Darkness Pokémon with 100 HP. The card lists level X. The card says it evolves from Darkrai. In this catalog that name is Darkrai (#491).
Darkrai LV.X sits at DP19/56 in DP Black Star Promos, position 19 of 56. Before it is DP18 Palkia LV.X, and after it is DP20 Magmortar. The set belongs to the Diamond & Pearl series. It was released on May 1, 2007. The printed size is 56, and the checklist is the same length. The listed rarity is Promo.
Dark Shadow is listed as Poké-Body. Each basic Darkness Energy card attached to your Darkness Pokémon now has the effect "If the Pokémon Darkness Energy is attached to attacks, the attack does 10 more damage to the Active Pokémon (before applying Weakness and Resistance)." You can't use more than 1 Dark Shadow Poké-Body each turn. The attack Endless Darkness lists 40 damage. The cost is Darkness, Darkness, Colorless. The Defending Pokémon is now Asleep. Flip 2 coins instead of 1 between turns. If either of them is tails, the Defending Pokémon is still Asleep. If both of them are tails, the Defending Pokémon is Knocked Out. Weakness is Fighting ×2. Resistance is Psychic -20. Retreat cost is 1. The card text says: Put this card onto your Active Darkrai. Darkrai LV.X can use any attack, Poké-Power, or Poké-Body from its previous level.
Darkrai (#491) has 40 other cards in the catalog. Those other cards are in 23 sets. The other printings with a release date run from 2007 to 2026. The earliest other card is Darkrai DP24/56 in DP Black Star Promos (2007). That card is named Darkrai, while this one is Darkrai LV.X. That card lists 80 HP, and this one lists 100 HP. Both list the rarity Promo. Kouki Saitou illustrated that card, and Shizurow illustrated this one. 39 other cards of Darkrai list a different HP.
The illustrator line reads Shizurow. I count 79 other cards in the catalog with that illustrator.
DP Black Star Promos set binder is where a full DP Black Star Promos set goes. This card fills one slot there. A generation binder holds one card of each species. Darkrai can fill a slot in Generation 4 binder (Sinnoh). Themed lists that include this exact card are Pokémon LV.X. I still need this card.
Each basic Darkness Energy card attached to your Darkness Pokémon now has the effect "If the Pokémon Darkness Energy is attached to attacks, the attack does 10 more damage to the Active Pokémon (before applying Weakness and Resistance)." You can't use more than 1 Dark Shadow Poké-Body each turn.
The Defending Pokémon is now Asleep. Flip 2 coins instead of 1 between turns. If either of them is tails, the Defending Pokémon is still Asleep. If both of them are tails, the Defending Pokémon is Knocked Out.
Put this card onto your Active Darkrai. Darkrai LV.X can use any attack, Poké-Power, or Poké-Body from its previous level.
DP Black Star Promos, in the Diamond & Pearl series. It was released on May 1, 2007. The printed size is 56.
DP19/56. It is entry 19 of 56 in this checklist.
Shizurow. The catalog lists 79 other cards with that illustrator.
Promo.
Darkrai #491, generation 4 (Sinnoh).
Endless Darkness (40).