We wanted to implement that in Nintendogs, and obviously we have the idea of people taking their dogs for a walk as part of the game play, anyway, and we wanted to use that and again combine that with a way in the future to kind of create this communication aspect to the game, where it essentially allows you to interact with other people.

ENGADGET: The Engadget & Joystiq Interview: Nintendo's Shigeru Miyamoto