Sorry it's late(Had I put off uploading this one much longer, I'd have to change it to "Feliz dia de los Muertos").
Due to time constraints I wasn't able to do more than Bluto and the remaining 5 Robot Masters, though I wanted to include Wily, Metal Wily, Dr. Light, Auto, Bush, Mega Man, Bass, and Proto Man. Too many characters in too little time, I guess. Oh well. Anywho, be sure to vote for your favorite costume at http://cbcl.comicera.com/news.php?id=6