A bunch of classic Nintendo and other video game cartoons are available to stream for FREE and legally on YouTube. Some of the cartoons, include the Super Mario Cartoons, The Legend of Zelda, Captain N, Mega Man, some Sonic cartoons, Double Dragon, etc.
Link: https://www.youtube.com/channel/UCUVnfQaEmCIhFZC5d_JniyQ/playlists
Mega Man Here: https://www.youtube.com/channel/UC8Qz20sPciU-ynMRdKtJw-A/videos
OMG this is awesome! I haven't seen some of these before as they were a bit before my time (90's kid). I guess I know what I'm doing this weekend..