Wii Fit--the upcoming Wii game which comes with its own balance board and a set of exercises--has already been a massive hit in Japan, with Nintendo finally confirming that the title would reach US shores on May 19, and Europe on April 25. Apparently, health-conscious gamers have none other than Nintendo icon Shigeru Miyamoto to thank for the upcoming game--or more specifically, Miyamoto's quirky habit of having fun when weighing himself.