v0.93.2*Added extra menu option on first screen to start Arena right away.*Added "More Options" to Options screen, and option to draw with DPad and B button.*Animations/Flips show on bottom screen sprite in arena now.
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)