The Hounds of Chaos are single appearance characters in Battle B-Daman.
Battle B-Daman
The Hounds of Chaos are several agents of the Shadow Alliance. The Hounds of Chaos were only seen when they are assigned to the task of stealing the extra parts to Wing Ninja from Yamato Delgado.
They managed to catch Yamato off guard and keep it away from him for a while but with his cat like skills he is able to retrieve the parts back from them with the help of Gray Michael Vincent.