AbilityRestoration
Once during your turn (before your attack), if this Pokémon is in your discard pile, you may put it onto your Bench. Then, attach a Darkness Energy card from your discard pile to this Pokémon.

Burning Shadows is a set in the Sun & Moon series. It was released on 5 August 2017. The printed size is 147. This checklist is longer, at 177 cards. Darkrai-GX is 158/147, in position 166 of 177 on this checklist. Before it is 157 Alolan Muk-GX, and after it is 159 Gardevoir-GX. The collector number is above the printed set size of 147. The listed rarity is Rare Rainbow.
Darkrai-GX is a Basic GX Darkness Pokémon with 180 HP. In the Pokédex this is Darkrai (#491), generation 4 (Sinnoh).
5ban Graphics illustrated this card. The same name is on 1,629 other cards in the catalog.
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 LV.X DP19/56 in DP Black Star Promos (2007). That card is named Darkrai LV.X, while this one is Darkrai-GX. That card lists 100 HP, and this one lists 180 HP. The rarity there is Promo, and here it is Rare Rainbow. Shizurow illustrated that card, and 5ban Graphics illustrated this one. Retreat cost there is 1, and here it is 2. 30 other cards of Darkrai list a different HP.
Restoration is listed as Ability. Once during your turn (before your attack), if this Pokémon is in your discard pile, you may put it onto your Bench. Then, attach a Darkness Energy card from your discard pile to this Pokémon. The attack Dark Cleave lists 130 damage. The cost is Darkness, Darkness, Colorless. This attack's damage isn't affected by Resistance. Dead End-GX is another attack lists no damage number. The cost is Darkness, Darkness, Colorless. If your opponent's Active Pokémon is affected by a Special Condition, that Pokémon is Knocked Out. (You can't use more than 1 GX attack in a game.) Weakness is Fighting ×2. Resistance is Psychic -20. Retreat cost is 2. 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 Burning Shadows, meant to hold every card of that set. This card is one slot in the Burning Shadows set binder. A generation binder holds one card of each species. Darkrai can fill a slot in Generation 4 binder (Sinnoh). I still need this card.
Once during your turn (before your attack), if this Pokémon is in your discard pile, you may put it onto your Bench. Then, attach a Darkness Energy card from your discard pile to this Pokémon.
This attack's damage isn't affected by Resistance.
If your opponent's Active Pokémon is affected by a Special Condition, that Pokémon is Knocked Out. (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.
Burning Shadows, in the Sun & Moon series. It was released on 5 August 2017. The printed size is 147.
158/147. It is entry 166 of 177 in this checklist.
5ban Graphics. The catalog lists 1,629 other cards with that illustrator.
Rare Rainbow.
Darkrai #491, generation 4 (Sinnoh).
Dark Cleave (130) and Dead End-GX.