New Super Mario Bros Wii

[EnSAn]

Try using search.
There is a post about this and how to get around this 'known' bug. You don't need a save file BTW. Using 4590 I was able to use LLE and go right in to the game. But it was soooooooo slow it was unplayable.
http://forums.dolphin-emu.org/thread-5024.html

Good luck