I am going to try and do a run soon on a Rasberry Pi with retrobox.

But I have no idea how to make it so the bios shows up before the game starts.

Because this is a rule for this game

Rule Adjustment 05/04/2020: All runs on Emulator need to show the BIOS Boot Up Screen! This requires a proper version of the GBA BIOS.

I need to learn how to do this.