For a while now I've been pondering over something. I'm tempted to make Yoku Man open source once MMU is out, so that people could be welcome to use him in their own fangames too. I would love for him to be a staple of Mega Man fangames, a secret boss who makes several appearances in the fangame community.
Incidentally, I kinda want Gatuca to do something similar with Pop (AKA Virtual Man), whose "
Chew Toy" status would easily allow him to make "guest" appearances in other MM fan games (as he considers himself to be a "superhero", thus mistaking people for villains).
At any rate, while seeing other secret bosses would do for a bit of variety (e.g. MexicanSunFlower's Boss Man), having Yoku Man make guest appearances in other MM fan games, ala Akuma, would be interesting (even though I clearly think that MMU should be his only appearance). He'd be like the Jason or Freddy Krugger of the MM world; a guy that you just can't get rid of, no matter how many times you kill him.