Notable extra-galactic and alleged extra-galactic species included the Yuuzhan Vong and the Chazrach, the Kwa, the Nagai and Tofs (originating in Firefist), and the Silentium and Abominor droid species which may have originated in the Yuuzhan Vong's home galaxy. The sentient ship (and its pilot) Luke and Leia encountered also originated in another galaxy.
The InterGalactic Banking Clan had influence as far as the Rishi Maze and Firefist. The Starhunter's Intergalactic Menagerie made trips to and from the outer galaxies, capturing rare animals for sale.
The Sith Emperor Vitiate, when telling the Hero of Tython his plans for his galaxy-destroying ritual, said that their were other galaxies beyond theirs and that he would experience or ignore them as he wished. This implied that he, or the Sith Empire had means of reaching these locations.
- Star Wars: The Old Republic (Mentioned only)
- Darth Plagueis (Mentioned only)
- Star Wars: Republic: Infinity's End
- Young Jedi Knights: Shadow Academy
- The New Jedi Order series
- Star Wars: Invasion
- Dark Nest I: The Joiner King
- Alien Encounters
- The Truce at Bakura Sourcebook
- The New Essential Chronology
- The New Essential Guide to Droids
- The Essential Atlas
- The Essential Guide to Warfare
- The Essential Reader's Companion
- Star Wars: Edge of the Empire Core Rulebook