No, but GBA BIOS improves accuracy. Nintendo DS: Yes, if using melonds core. Requires bios7.bin , bios9.bin , firmware.bin .
In this article, we will break down everything you need to know about the Batocera BIOS pack—what it contains, where to find it, how to install it, and how to troubleshoot common issues. batocera bios pack
It was buried on a text-only forum dedicated to retro handhelds. The subject line was simple: No, but GBA BIOS improves accuracy
(If you want, I can produce a concise filename checklist for specific systems—state which consoles/systems you care about.) if using melonds core. Requires bios7.bin