use this to fool your friends to make it look like you have super smash bros on your ds (you cant acualy play the game it has to many bugs so its now an app)
I don't have a wii u anymore to test it myself, but if homebrews are not visible on the wii u menu I think you can press L + R + minus to open the plugin menu, there should be an option called "homebrews on wii u menu" or something similar