StarNight theme originally created by Jiiwah, Oops, Shunite, and Highjah. Currently maintained by Ayatus on GBATemp and a member of the TGames crew. Optionally there's also a source menu button set available to download. Place it including the source_menu.ini in the starnight theme folder and every time you use this theme you will see the source menu buttons as well. You may need to edit the source_menu.ini to your liking.
StarNight theme - DOWNLOAD
StarNight source menu - DOWNLOAD