It's been in development for years, but at long last, you can experience the fan project known as "Mega Man 2.5D." Peter Sjöstrand and his team have just released a public beta version, which features one playable co-op stage set in Shadow Man's domain. You can download the beta at the following link: http://petersjostrand.com/index.php
Peter hopes to bring additional content to the beta soon including more stages, modes and other goodies. Stay tuned!