Now, I know this may sound stupid...... BUT THOSE ANYONE KNOW HOW TO MAKE A MUGEN STAGE!?
I'll tell you why: I wanted to make a Luigi Death Stare stage, so I looked up how to make a stage. I found a tool called Automatic Stage Creation Tool by Cybaster (I think). I downloaded it and used it, but when I pressed one of the three modules, it came up with an error message. Think it was something like this: couldn't execute "java". No such file or directory.