'Nuff said.
I don't think MUGEN is open source. If it isn't, a port is basically impossible.
That would be awesome man. I hope you do find the time to look into it in an effort to bring something great to this community.I tried compiling/fixing up ikemen plus about a year ago for the switch, at the time libNX wasn't up for the port yet but it maybe ready now with the recent updates.