You can extract these files using a hacked DSi or a 3DS through the following steps:
Many emulators, such as DeSmuME, allow you to specify the path to your DSi BIOS for accurate emulation. dsi bios files download exclusive
Downloading these files from the internet is technically a copyright violation, so they are rarely hosted on official sites. However, community members often look to these "exclusive" archives: the DS and DSi Bios Files of #MelonDS | #NDS + #DSi Menu You can extract these files using a hacked
Always prioritize dumping your own files to stay safe, and enjoy the nostalgia of the dual-screen era! such as DeSmuME