Wii U Common Keys -

The release of the Wii U Common Keys was not a product you could buy, but a watershed moment in console security. For the average player, it meant nothing. For developers, archivists, and power users, it was the skeleton key that transformed the struggling Wii U from a locked-down appliance into a fully explorable, preservable, and customizable machine.

Example: Thanks to the Common Key, Breath of the Wild on Wii U was fully reverse-engineered for graphics packs and FPS++ mods long before official patches. wii u common keys