maybe you haven't sinchronized it yet..you need to do that by opening the Wiimote where the batteries are and pressing the red button, then open the compartment in the front of the Wii andpress the red button also.
well in Mario Party you have to wait your turn and walk around in the boards and then until everyone is finished then you play mini games..that's boring, in Sonic you play mini-games almost instantly and that's what I like, not having to wait, and the games work fine with me