russellsprouts works on a demake of Super Smash Bros. for the Nintendo Entertainment System called Super Smash Bros. NES. The author claims to have a working game engine with platform collisions and a lot of art. The game seems far from being complete and might also suffer from potential copyright claims, but let’s keep track via nesdev.com and see how things will turn out.

http://forums.nesdev.com/viewtopic.php?f=32&t=14395