Is there any chance a category can be made for Hokuto no Ken 2, or should it be given its own page? It's a lot more difficult than the US version, and it has additional cutscenes.

Sure, added.

Thanks, I appreciate it.

One more question I had: In the Japanese version there's an additional mode of play, "VS START", which is essentially just a boss rush of the first four bosses, without any power-ups. Could a category potentially be added for this as well?

Timing rules would be the same as the main category, starting on player control, ending when the screen goes black before the "Game Over" screen.