Wii controllers disconnect
Solution 1:
Here is a Video explaining it, just skip to about 42 seconds in:
My recommendation would be first of all make sure the batteries are fresh in every remote, then after having done that look on the Wii next to the disc slot there should be a hinged door open it and press the red button this will disconnect all remotes then where you put the batteries in press the small red button in it this should sync up the remotes and it should all work fine.