Register your Wii, Dsi, DsiXL, or wii fit plus, and also take surveys on the website when they are available. :) have fun!!
no
you can register your legible games and consoles (they will come with a packet that says JOIN CLUB NINTENDO! behind or in front of your manual) to earn coins and you can trade those coins for games,...
go to the Nintendo website and look for it.
you connect to the internet and find system update in other settings.