BigBlueBox's infamous release included patched versions of the SDK that tricked a standard retail 3DS into behaving like a DevKit, effectively bypassing Nintendo’s hardware restrictions for development purposes.
Perhaps the most valuable part for homebrew developers was the leaked documentation. Hundreds of pages detailing:
Using the SDK DevKit Tools 3DSWare 3DS INTERNAL-BigBlueBox can provide several benefits for developers, including:
This blog post is about the history and significance of the "BigBlueBox" leak, which remains a landmark event in the Nintendo 3DS hacking and development scene.