This update removes the copy protection from #2949: Chrono Trigger DS (J), and allows the game to run with the saver patch enabled.To install, just overwrite the file with the same name in the scshell folder.
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)