No, too random. Although Gengar is cool.
Oh, so Jigglypuff isn't random? ¬_¬
Not saying I want Gengar in vanilla Smash, but he'd definitely have potential as a hacked character. As previously proven by a certain Storm's past moveset for a Ghost-type...
Jigglypuff being in SSB is old news.
Mostly Ghirahim of course.