http://www.techradar.com/news/snes-mini-hack-tool-hackchi2-released-lets-you-add-more-games

It's only been on store shelves for a little over a week, but the SNES Mini has already been fully hacked, letting brave owners load up their miniature consoles with a suite of additional games.

Now, before we go any further, it's worth noting that the hack requires the use of ROMs, the legality of which is forever spoke of in shades of grey, while tinkering with the SNES Mini in this way will invalidate your warranty. So proceed at your own risk. But there's been suggestion earlier that Nintendo itself is prepared for this to happen, and even added an Easter egg within the NAND.