I see you posed this question at gbatemp as well but didn't get an answer. It's an easy fix. You'll need to patch the main.dol in your iso and re-burn the disc. Go here and follow the "Patching/Fixing the ISO" instructions at the bottom of the post: http://www.wiihacks.com/wii-games/28...ario-bros.html
Per the edit question it might just be an incompatibility with cioscorp. For that you should definitely ask the devs of that app @ gbatemp.
And because this thread may get locked (for the existence of too many NSMB threads on the forum), you should direct any further questions about NSMB in that thread I linked you. There are people who hang around there to answer specific questions. Good luck with your game.