Play Nekketsu Kouha Kunio-kun - Bangai Rantou Hen (japan) Online

I picked up Nekketsu Kouha Kunio-kun - Bangai Rantou Hen for the Game Boy a while back. It's a 1990 release from Technos Japan Corp., the same folks behind the Kunio-kun series. On a system filled with simpler action games, this one stood out for trying to bring a more involved brawler experience to a handheld.

You control Kunio, a high school delinquent, as you walk through the city fighting rival gang members. Your main goal is to clear each area of enemies, moving screen by screen. The combat is straightforward; you punch, kick, and can pick up weapons like bats and knives dropped by foes. A unique mechanic lets you charge up a special spinning attack when your health is low, which can turn the tide in a tough fight. The pacing is quick, and the difficulty can spike unexpectedly, especially when you're surrounded. It feels rough and immediate, like a street fight condensed into a tiny screen.