It's an actual game, but it's not a one-on-one fighting game- more like Final Fight, where you (and a friend) take on lots of enemies. Fun if you can get your hands on it.
I got 3 of those by fighting them with the characters in the row right above them. Ie, do route D with Karura, route G with Kamyu, and route H with Urutorii. Too burned out to try the last one.