This tool allows you to convert saves for Zelda Spirit tracks so that they work on RC9 and beyond of the 2.0 EZ5 kernel if they were made on RC8 or before (without it you may run into trouble and lose the save data).
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)