this is a sav file for Mario vs donkey kong 2 that has all levels unlocked plus some cool homemade levels for you to play with already on thereand also check received levels because theres tree in there.Have fun
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
Or when your player dies, you can say in code, if enemy exists, do nothing, but if enemy does not exist, then create enemy at certain spot. (This would be a pain tho for lots of emeies)