StarNight

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