Fist of the North Stylus
Here's how Hokuto no Ken: Hokuto Kami-ken Denshousha no Michi (something like Fist of the North Star: The Way of the Storyteller of the Northern God maybe, but don't take our translation as gospel) works: you touch certain marked points on the screen with the stylus to make Kenshiro fight and to otherwise progress the story along.
It's kind of a simple idea, but touching icons on the screen is sort of the basis for many DS games (hello, Ouendan) and it works just fine. This way, at least, the Fist of the North Star story is told in a faithful way, using gorgeous visuals. They're especially gorgeous when compared to the NES Fist of the North Star game.