Super Mario Crossover
Even though this came up in an advert. on Tumblr it’s pretty cool.
They got the controls for Mega Man down perfectly. Enjoy.
P.S. Apparently it contains the entire Super Mario Bros. (NES) game, very well emulated, with these characters to choose from, all having their own abilities and control types: Mario, Samus (Metroid), Mega Man, Simon (Castlevania), Link (Zelda), and “Bill R.” (not sure which game, maybe contra?).
I’m going to try and beat the game with Mega Man and Link :D