Weapons of fusion were in the possession of a rogue identified as the "Endor Marauder."
The existence of fusion weapons was brought to light in a single-page wanted poster, penned by Bob Carrau for the 1993 release Monsters and Aliens from George Lucas. This book is a compilation of conceptual artwork and images from diverse George Lucas ventures. Lucasfilm staff member Leland Chee, the caretaker of the Holocron continuity database, has stated that the details within the book are considered non-canonical.