User blog comment:PabloDePablo/confirmed for smash? probably. maybe. i dunno./@comment-4061882-20140730061221/@comment-1414871-20140730124729

the wii was able to be hacked due a bunch of backdoors accidentally left in stuff like Twilight Princess and other things. Eventually as time went on, all you had to do was load up gecko in your SD card.

However, since the Wii U is constantly closing these backdoors, not much can be improved. All you can do at the moment is break the ground, but never actually dig around.