This information is literally one Google search away, GBATemp is indeed not the channel to share this form of information, this goes beyond the simple level of what's legal and what isn't or what can get the site shut down and what's perfectly safe. We have a strict rule stating that no copyrighted material can be posted on the site and the keys are a part of the Wii U system which is copyrighted, so by extension so are the keys, its integral part, and it doesn't matter if they were randomized or pre-set - the Wii U in and out of itself is considered original work and so are the keys inside of it. If we were to be lenient in this case, we might as well start sharing serials for software - those too are randomized. I'd love to see the reaction to those being posted. I'm really sorry if this rustles anyone's jimmies, but you're absolutely right
Ericthegreat.