@mitu I see thx, so do you think this is very specific or maybe more common and with more roms? or do you even know of a compatibility list of lr-gpsp?

@usrstu Please can you post a verbose log. How did you update btw? Make sure you update RetroPie-Setup if you installed from source.

@mitu ok but yes, i tried different roms and the bios is there and correct, validatd the hash. it is getting recognized by mGBA too. i thought maybe it's related so i answered in this thread. It really seems like a BIOS problem though because at first start there is no gba intro only after the restart and the following restarts the intro appears, really weird problem. Are there other known gba roms with skip-intro problems maybe so i could test those?

@VTHokiEE
I think it depends on which emulator made those save files. Like if you did a save state with lr-vba-next and try to load it with lr-gpsp, it will not work but go back to lr-vba-next and it can read them again.

ZIP files cause headaches on some emulators that may or may not support the specific ZIP format that archive is in, so to avoid any ZIP issues I have unzipped ALL archives so that the ROM is there for the emulator to load without having to spend extra time extracting the ZIP archive to a temporary file then loading that. This all causes emulator slowdowns, even just a small one it all adds up, plus if you're using purely an SD card or USB pendrive to run everything from it will be even slower. Also an increased risk or SD card corruption with all those read/writes on an SD card

The only archives I leave alone are the arcade ones, these MUST be left zipped or WILL fail. MAME, FBA and NEOGEO are the main 3

I use OSMC with KODI and RetroPie so have it run everything from an external USB hard drive, the only function the SD card performs is booting the PI 3 B I use at the moment then control is passed onto OSMC which runs off the USB hard drive so being much faster and much less chance of SD card corruption. I know thats not possible for everybody especially if you have a portable RetroPie in a handheld where space is very limited