In-game saves fail in Pokémon LeafGreen. When I save in-game in Advance Wars, it shows a success message, then the next time I enter the game it is as if I never played. It seems I can't save properly in any game when using in-game saves.
Pokémon is set to save-type FLASH-128 and Advance Wars is set to FLASH-64. Changing to SRAM in Pokémon makes the game not boot, just a white screen. I thought the point of this setting was to simulate whatever the original cartridge used.
Save states do work. Have I misinterpreted how this cartridge works, can I only save with save states? Or is there something else I need to setup? I did download the latest .efu-firmware file and ran it but that didn't change anything.
I found this guide for patching repro carts https://gbarompatcher.com/blog/how-to-fix-gba-repro-save-sram-patch/
Do I need to patch the ROMs to make sure the saves point to this carts particular flash memory address?