Can the Wii Mini play Mario Kart? If so, does the menu just show up different or how does that work because you don't have a Wi-Fi connection. Also can Wii Fit and the Wii Fit board hook up to the Wii Mini? Can other accessories like a dance mat?
You can play Mario Kart and Wii Fit on the Wii mini, but Wi-Fi features will not work. The menu for Mario Kart will still have the Wi-Fi option, but it won't work. Dance mats probably will not work, since the Wii mini and newer Wii consoles do not have GameCube controller ports.
Mario Kart Wii should work fine on the Wii mini. I don't have one, so I'm just guessing. You'd probably just get an error code if you try to connect.
Wii fit should also work fine, but again, I don't have a Wii mini to test this.
I'm not sure about dance mats, sorry.