For anyone using a Mac, you can use the following program to remove all the extra hidden files the macs add to your SD card. This should help if you're running into issues. It's worked great for me!
http://www.macupdate.com/app/mac/52076/him
Thanks so much! This solved the problem for New Super Mario Bros. Unfortunately, Wii U Sports and Yoshi's Woolly World give a black screen with white letters saying there has an error occurred and something with stack id?