AttackCoordinated Pack
For each of your Benched Houndour, search your deck for a Basic Darkness Energy card and attach it to that Houndour. Then, shuffle your deck.

Obsidian Flames is a set in the Scarlet & Violet series. It was released on August 11, 2023. The printed size is 197. This checklist is longer, at 230 cards. Houndour is 131/197, in position 131 of 230 on this checklist. Before it is 130 Umbreon, and after it is 132 Houndour. The listed rarity is Common.
Houndour is a Basic Darkness Pokémon with 50 HP. In the Pokédex this is Houndour (#228), generation 2 (Johto). The card lists Houndoom, Houndoom (#229) under evolves to.
Scav illustrated this card. The same name is on 31 other cards in the catalog.
Houndour (#228) has 31 other cards in the catalog. Those other cards are in 23 sets. The other printings with a release date run from 2001 to 2025. The earliest other card is Houndour 5/75 in Neo Discovery (2001). Both list 50 HP. The rarity there is Rare Holo, and here it is Common. Aya Kusube illustrated that card, and Scav illustrated this one. 12 other cards of Houndour list a different HP.
The attack Coordinated Pack lists no damage number. The cost is Darkness. For each of your Benched Houndour, search your deck for a Basic Darkness Energy card and attach it to that Houndour. Then, shuffle your deck. Focus Fangs is another attack lists 30 damage. The cost is Darkness, Colorless. Flip a coin. If tails, this attack does nothing. Weakness is Grass ×2. Retreat cost is 1. The flavor text reads "It is smart enough to hunt in packs. It uses a variety of cries for communicating with others." The regulation mark is G.
I keep a set binder for Obsidian Flames, meant to hold every card of that set. This card is one slot in the Obsidian Flames set binder. A generation binder holds one card of each species. Houndour can fill a slot in Generation 2 binder (Johto). I still need this card.
For each of your Benched Houndour, search your deck for a Basic Darkness Energy card and attach it to that Houndour. Then, shuffle your deck.
Flip a coin. If tails, this attack does nothing.
It is smart enough to hunt in packs. It uses a variety of cries for communicating with others.
Obsidian Flames, in the Scarlet & Violet series. It was released on August 11, 2023. The printed size is 197.
131/197. It is entry 131 of 230 in this checklist.
Scav. The catalog lists 31 other cards with that illustrator.
Common.
Houndour #228, generation 2 (Johto).
G.
Coordinated Pack and Focus Fangs (30).