Rooster Fighter is an anime and manga whose title is both self-explanatory and woefully inadequate for capturing its full scope. The rooster indeed fights, but he also does so much more.
Cut from the same cloth as classic manly action series like Fist of the North Star and Golgo 13, the simple twist of Rooster Fighter is that its gruff and grizzled hero is the literal cock of the walk. Keiji is a chicken seemingly without peer, and the very fact of his existence could be enough to carry a comedy series. However, as tongue-in-cheek as it can be, Rooster Fighter plays itself mostly straight, and the result is a surprisingly good overarching story that continuously escalates and delivers shock and awe in the best ways.
My initial impression just from promotional material was that this chicken is much larger than normal, a la Chicken Boo. I was wrong; he’s a normal-sized bird. So what does this small Rooster Fighter fight? Why, giant house-sized Demons of course. How does he fight them? With talons, but also a super cock-a-doodle-doo beam (or kokkekoko in Japanese). Why is he fighting Demons? Because one of them kidnapped his little sister. Of course.
The series is somehow able to hit every trope you can think of while also feeling oddly fresh and exciting. For example, Keiji slowly gathers a crew (whether he wants to or not), and they pretty much slot in perfectly with Kenshiro’s group. You have the kid sidekick, the girl who’s more about gadgets and intelligence, and so on…yet while they certainly give Keiji the biggest spotlight, the rest of the team is shown accomplishing feats and making up for his oversights and shortcomings. On top of that, every twist is legitimately surprising, possibly because “standard character detail or story development” takes on an added wrinkle when you follow it with “and also they’re all chickens.” For instance, the hen can communicate with humans using a smartphone???!
Rooster Fighter is a ridiculous work, but the most ridiculous thing of all is how legitimately good it is. If you turned everyone into humans and kept everything largely the same, you would still end up with a well above average battle series. Making everyone a bunch of cluckers elevates it beyond satire and irony into the realm of hyper sincerity, where most series wish they could be.