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Nintendo will implement a region lock process for its Wii U hardware, the company has confirmed to CVG. This means that games bought in the US, Europe or Japan will only be accessible for machines built for those regions. Region-locking devices is a longstanding Nintendo policy that has been in place across numerous games consoles including the 3DS, Wii, GameCube, N64, SNES and NES. Platform holders Sony and Microsoft take a different stance to region-locking. Both allow publishers to decide whether they want to lock games to continents, of which in most cases they do not.
~ Source