Biosdsi9rom

I need to verify if "biosdsi9rom" is a standalone tool or part of a larger package. Searching for similar terms might help. If I can't find direct info, maybe it's a typo. For example, could it be "DSi 9ROM" or "BIOS DSi 9ROM"? Also, considering the Nintendo 3DS and Switch have modding scenes, but DSi is older. The 9Menu is a menu used in 3DS exploits, so maybe there's a DSi version called 9Menu?