Clone and Repro Cart Problems
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Problems with carts without a battery pre-installed
If your cart looks like this, your save will be wiped if your re-write the rom file.
How it works
The way this cart functions is the rom is modified to write the save back to the flash chip when you save your game. When the game starts, the opposite occurs, the game extracts your save from the flash chip and puts it back on the SRAM so to the game it appears like everything is normal.
How to resolve the issue
You will need to install a battery or patch the rom you flash to also perform the above technique. At this time there are no programs that can automatically do that for you.
