how do i use a bios file to fix my game? i was playing fire emblem on an emulator. then i looked at Matthews character information, and it froze and said i needed a bios file to work properly... so what is the recommended file, and how should i go about using it?
thank you.

You know, people would find this topic a lot more informative if you would have specified that you were talking about Gameboy Advance emulation, and what emulator you were using (but since there is basically only one GBA emulator above all else, I think you're using VBA).

Now, as for your problem: Surprisingly enough, using the GBA BIOS gets you into more trouble than it's worth and most games work better without it. However, in cases like Fire Emblem, using the BIOS might make the "experience" better.

The GBA BIOSes that I've found are usually named gbabios.bin or just bios.bin. You can put it wherever you like and you enable it by going to Options --> Emulator ---> Select BIOS File..., followed by Use BIOS.

Look around the menus a bit, VBA isn't a bomb that blows your computer to bits if you look around and tinker with it.

Great pseudonym by the way.

wow thank you!