Shigeru Miyamoto has wants to set a "world standard for avatars" with Mii, and even joked that the virtual people would be great when used as a form of government ID.
Speaking in the latest Iwata Asks, Miyamoto said he wants Mii avatars to become a global phenomenon.
"Simply put, I want to spread Mii characters all around the world," he said. "Exchanging it with people close to you is a given. Whether you use StreetPass or through the network, I want to implement Mii characters in all sorts of ways. Ultimately, I want Mii characters to be the world standard for avatars.
"I hope that in the future, when you have to go to the city hall for some formality, they'll ask you to submit your Mii character too [laughs]. If it becomes a worldwide format, it'll be fun. Purely and simply, I just want everyone to use it in a variety of ways.
"Well, that ambition about the city hall thing might be a bit extreme, but I do want Mii to be more widely used."
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3DS launched in Japan this weekend, and it's set to hit retail shelves in Europe on March 25 and North America on March 27.