Ok, so a couple of ideas I found from other places.
1. Wii Sports (or anything really) hitting the controller into something else
2. Christmass lights messing with the IR
3. Wii Wheel Edition
4. Wii krter Edition
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS









