@mitu sorry to necrobump, but as far as I know, pokemmo is written in java so it might be possible. Got it working on the lxde desktop, not sure about how to run it without the xserver though. also it is available in the repos
I tried to reproduce the issue, but I don't seem to be able to. Using the same emulator (lr-mgba), with or without the BIOS, the save file is loaded correctly.
Can you check if you have enough space available on your USB ? The save file (in-game saves) is stored next to the ROM, it's named <ROMNAME>.srm, if you don't see one, then the emulator cannot save the file.
How are you mounting the USB stick to the system ? Did you follow the docs or did you do it manually ?
@mattrixk Going over the history of this I would say the best first Pokemon game I ever played was Crystal, I played and beat yellow before Crystal but Crystal had the held items in addition to 2 newer types
also bug type Pokemon while they existed in the previous gen, they weren't as weak in gen 2 and they had better attacks like Fury Cutter and Megahorn so the gen 2 games were far more balanced, and they didn't have as many exploits if any either.
I don't know the full extent of the problem, but it seems like you could create a script that would first launch RetroArch and then after a wait, send a network command to load the game. You could then create a launch command in /opt/retropie/configs/emulators.cfg that would launch the script and apply it to the ROM. Granted, this is a very involved solution and there might be a better way. Out of curiosity, why are you opposed to simply launching the games with a core that will run them?
It's likely you could get it to run through Wine. Normally, this wouldn't be recommended, as the results would be pretty slow. However, a basic editor like PKHeX might run decently well. Rather than point you to a single tutorial out of so many, do a Google search for "wine on raspbian" and just pick one that suits you.
Another option is you could play Pokemon ultra violet which is a rom hack that combines fire red and leaf green into one game which allows you to catch every Pokemon. However I agree this feature being added in would be nice.