For those who are extremely late to the party like myself, there is a flash game out right now called Super Mario Bros. Crossover that is one of the coolest things ever. The game simply takes some of the most legendary characters from the NES days like Zelda, Mega Man, and Bill from Contra, and puts them in the original Super Mario Bros game. It really is more amazing than it sounds. Just watch this trailer of Ryu Hayabusa kicking ass in Mario’s world. It will leave you with a smile on your face.
http://www.youtube.com/watch?v=Zdr95SSgm2g&feature=player_embedded
Play Here: Newgrounds