pokemon platinum r4 double save

well i've been double saving on my r4 to avoid losing my save data, but recently i beat the elite four, but at the end of it it only let me save once. because of that i lost that save file and ended up right at the front of the elite four entrance again. is there a way to patch my current save file and keep all my pokemon and still be able to get past the elite four?

The save and loading functions do not change. So, try patching the ROM with ARM7 binaries from a working donor ROM.