Same as my other download (http://gbatemp.net/index.php?download=4403) but this time it's an XML file for use with Action Replay DS. You might wanna use the Memory Expansion Pak as it is makes big changes to the RAM. Good Luck
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)