But perhaps the greatest confusion came from Kenner toys, who produced the Zuckuss and 4-LOM action figures with their names reversed. It was not until Galaxy Guide 3: The Empire Strikes Back came out in 1989 that this error was corrected. Like the 2ndQuest said, it was due to the toy mix up. Also, all of this info is available on Starwars.com in the databank. It's quite easy to research actually.