On remote syncing.
When friends bring wiimotes over you do not sync them with the buttons!
Basically, this is Nintendo's solution to multiple wiis that may be close by.
There are two types of syncing, perma syncing and temp syncing.
Perma syncing works by pushing the buttons on the wiimote and wii.
Temp syncing is done from the pause menu. If you go there and pick the reconnect remotes option and push 1 and 2 on all your controllers, even non-synced remotes will work.
I do this every time I travel to my parents house. It works!