On that page, RockmanCosmo, the leader of a team called SciLab Secrets working to preserve lost Rockman games for Japanese mobiles, announced eight Rockman games (including games based on the classic, Legends/Dash, and Battle Network series). There's also a link there for easy installation so you can get right to them.
Better yet,
here's a link where you can download a later package that also includes Rockman Tennis.
(As I'm working on videos about my brother's Mega Man 2 haul at Christmas, plus another video where he plays all the games that relate in some way to Mega Man 2, I'm particularly interested in Rockman Pinball and Rockman Tennis. Those games are exactly what you expect them to be.)
Some of those are mappable. I don't know how much interest there would be, but I think that their obscurity alone is probably a good reason to consider doing so, to help prevent these curiosities from being forgotten/unknown.