"PSFreedom JIG" for Dingoo is a special version of "PSFreedom" created to behave as the JIG device. Thanks to this any user can enable the factory/service mode in his PS3.
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)