It's always a joy to see hidden little details and secrets in video games, it shows just how much developers care about the creations that they make. Unsurprisingly, Mario is no exception, and you can see just how many elusive titbits can be found in Super Mario 64 (as well as the DS version), Super Mario Sunshine, Super Mario Galaxy, and Super Mario Galaxy 2.
Some of you may think you know all there is to know, but it might be worth watching the video below anyway, just to be sure.
Did you discover something new? Let us know in the comments!