This software is able to inject a GBA save file into a botleg/repro ROM game that has been patched for batteryless clones cartridges.

This won't work on a downloaded or dumped ROM from an original cartridge, for now there isn't any batteryless patch available out there.

Only a limited repro ROM's are available for now :

• Pokemon Emerald GBA
• Pokemon Fire Red GBA
• Pokemon XY GBA
• Pokemon Leaf Green GBA
• Pokemon Ruby GBA
• Pokemon Sapphire GBA
• Zelda the Minish Cap
• Pokemon Glazed
• Pokemon My Ass
• Pokemon Snakewood

You can do so by opening the botleg ROM with the emulator called VBA (Visual Boy Advance), once the game is started a .sav file will be created. Note that it's possible that some botleg ROMS won't work correctly on VBA (corrupted save).