This attack does 30 more damage times the amount of Energy attached to all of your Pokémon.
Dark Union-GX
ナイトユニゾンGX
Put 2 in any combination of Pokémon-GX and Pokémon-EX from your discard pile onto your Bench. If this Pokémon has at least 1 extra Energy attached to it (in addition to this attack's cost), attach 2 Energy cards from your discard pile to each Pokémon that you put onto your Bench in this way. (You can't use more than 1 GX attack in a game.)
This card was included as a Regular card, a Full Art card, a Special Full Art card, and as a Secret Rainbow Rare in the Unbroken Bonds expansion, first released in the Japanese Night Unison subset. The Regular print features artwork by Mitsuhiro Arita, the Full Art and Rainbow Rare prints feature artwork by 5ban Graphics, while the Special Full Art print features artwork by kodama. The Regular print was reprinted, alongside an entirely gold Full Art print, in the Japanese Tag All Stars subset.
Mitsuhiro Arita has described the illustration on the card's Regular print as depicting a "cooperative link attack" that combines Greninja’s Water Shuriken and Zoroark’s Cut.[1]
Origin
Dark Pulse is a move in the Pokémon games that both Greninja and Zoroark can learn via TM97. Dark Union's Japanese name, Night Unison, is the name of the Japanese expansion in which Greninja & Zoroark-GX was first released.