Themely is a beautiful theme manager for the Nintendo 2D/3DS.
Themes can be downloaded from sites like 3DSTheme.es by either simply scanning a qrcode with the console, or downloading the theme and copying it to the “themes” folder in the root of the SD card.
To exit Themely, press the Start Button, then press the Home Button.
Developer Page: https://github.com/ErmanSayin/Themely
Be sure to checkout this awesome Old School PC Bios Boot Screen Generator: