A very simple application that shuts your console off.
Built with BlocksDS.
Head over to the releases section of this repository and download the latest poweroff.nds file.
To use this application, simply boot it using your favourite launcher. If loaded correctly, this application should power your device off.
I created this application to power off the console without having to use the power button.
It can be used as a BOOT.nds file for homebrew applications that use it to go back to the launcher. Using poweroff.nds as a BOOT.nds file will cause these types of homebrew to turn the console of instead of returning to a launcher.
Take note that for this to work, you may need to adapt your Unlauch settings to no longer use BOOT.nds when no buttons are held, as that would cause your console to immediately turn off after booting.