Wait...nobody has re-inserted the yume kojou sprites into mario 2 yet? I sorta assumed someone would have done that by now. I'd like to see a nes / famicom romhack like that.
I've played a hack that does this. There were even shrunken versions of the playable characters!
Also, while I'm a little upset that "Dr. Luigi: Green Cap Edition" didn't make it, I'm at least glad that this hack is finally out.