Well any physical activity burns calories and if you burn more than you consume then yes you will lose weight. But I wouldn't suggest using a game system to do that because you seriously aren't going to burn as many calories playing then you would going to the gym and running for an hour. (FYI, you did a double posting with this topic)
The guy on the left seems taller then the one on the right, maybe a fake xD? Anyway if you do it intesively every day it does work to lose weigth, but if you really want to lose weight go out and practice a sport or running
you know the creators have said that its not designed to make you loose weight right? its to be "more aware of your body"