This should have close to 100% speed and accuracy, besides the occasional game which included special hardware (like WarioWare: Twisted). For one thing, there's GBA Virtual Console (and Virtual Console injections), which just runs GBA games natively on the 3DS in the system's backward-compatibility mode. If you're OK with moving away from emulation, there's a couple more options you can try.
Somebody can hopefully suggest an older version that will work OK, I have no idea exactly when it became broken.Īnother gpSP-based emulator is shinyquagsire's CitrAGB, which is no longer in active development but hopefully still works on modern setups. RetroArch includes a gpSP core, but that core has been bugged and crashy/unusable for multiple years now. You probably want something gpSP-based, since that uses a dynarec to translate code to 3DS assembly in real time, allowing much faster performance (and a fairly significant penalty to accuracy).
Yeah, on an original model 3DS, mGBA will get you nowhere.
