AttackBring Down
The Pokémon that has the least HP remaining, except for this Pokémon, is Knocked Out. (If multiple Pokémon are tied, choose one.)

Greninja is Pokédex #658, generation 6 (Kalos). Greninja is a Stage 2 Darkness Pokémon with 130 HP. The card says it evolves from Frogadier. In this catalog that name is Frogadier (#657).
Greninja sits at 117/214 in Unbroken Bonds, position 117 of 238. Before it is 116 Krookodile, and after it is 118 Inkay. The set belongs to the Sun & Moon series. It was released on May 3, 2019. The printed size is 214. This checklist is longer, at 238 cards. The listed rarity is Rare Holo.
The attack Bring Down lists no damage number. The cost is Colorless, Colorless. The Pokémon that has the least HP remaining, except for this Pokémon, is Knocked Out. (If multiple Pokémon are tied, choose one.) Mist Slash is another attack lists 70 damage. The cost is Darkness, Darkness. This attack's damage isn't affected by Weakness, Resistance, or any other effects on your opponent's Active Pokémon. Weakness is Fighting ×2. Resistance is Psychic -20. The flavor text reads "It creates throwing stars out of compressed water. When it spins them and throws them at high speed, these stars can split metal in two."
Greninja (#658) has 39 other cards in the catalog. Those other cards are in 18 sets. The other printings with a release date run from 2013 to 2026. The earliest other card is Greninja-EX XY20/211 in XY Black Star Promos (2013). That card is named Greninja-EX, while this one is Greninja. That card lists 170 HP, and this one lists 130 HP. The rarity there is Promo, and here it is Rare Holo. 5ban Graphics illustrated that card, and Yusuke Ohmura illustrated this one. 33 other cards of Greninja list a different HP.
The illustrator line reads Yusuke Ohmura. I count 60 other cards in the catalog with that illustrator.
Unbroken Bonds set binder is where a full Unbroken Bonds set goes. This card fills one slot there. A generation binder holds one card of each species. Greninja can fill a slot in Generation 6 binder (Kalos). I still need this card.
The Pokémon that has the least HP remaining, except for this Pokémon, is Knocked Out. (If multiple Pokémon are tied, choose one.)
This attack's damage isn't affected by Weakness, Resistance, or any other effects on your opponent's Active Pokémon.
It creates throwing stars out of compressed water. When it spins them and throws them at high speed, these stars can split metal in two.
Unbroken Bonds, in the Sun & Moon series. It was released on May 3, 2019. The printed size is 214.
117/214. It is entry 117 of 238 in this checklist.
Yusuke Ohmura. The catalog lists 60 other cards with that illustrator.
Rare Holo.
Greninja #658, generation 6 (Kalos).
Bring Down and Mist Slash (70).