Is there a reason this is disabled for the earlier Pi besides speed? I notice lr-vba-next is unplayable, but lr-mgba does alright. I use lr-gpsp for most games, but some like Pokemon Emerald and Sapphire won’t run. They run fine in standard gpsp, but I like the consistency of having all libretro cores.
You can play some of those games with lr-gpsp, you just have to load them from the rgui rather than emulationstation- not sure why they only work from the rgui but they do.
That is very odd, I would think that would be a file name issue, but I went through and made sure everything had a lower case extension and no special characters. Leaf Green and Fire Red work just fine.