Super Mario Galaxy and Super Mario Galaxy 2 are among the most critically acclaimed and popular titles of the Wii era, even proving popular as Virtual Console downloads on Wii U.

They're also games with interesting histories - from the origins of the sequel as Super Mario Galaxy 1.5, down to the fact the first game was desired so much by naughty people with an aversion to spending money that it was the most pirated game for two years. Throw in unused assets and animations that point to intriguing design choices, and they're a good topic for the Did You Know Gaming? treatment.

Well, that's exactly what's happened - take a look below.