This article covers a subject that has been deemed non-canon by either the author or the Star Wars licensees, and thus should not be taken as a part of the "real" Star Wars universe.
"This was actually just a quick sketch done on a whim when we were creating additional unlockable costumes for the game (things tend to get silly when artists' block sets in). Not thinking anyone would take us seriously, we brought it to a sign-off meeting to pitch the idea. Because everyone on the team is a huge Monkey Island fanatic, it made it through! Guybrush is one of those characters that seem to go through a re-design in every game he appears, so we didn't need to stick to any one particular style. The idea was so popular that we had a few artists take a crack at the Starkiller version. In the end we used a bit from all of the rough sketches to achieve the final piece seen here."
―Star Wars: The Force Unleashed II Collector's Edition digital art book[src]
Concept art of Threepkiller, as well as Monkey Island versions of Darth Vader and Juno Eclipse, for The Force Unleashed II
Guybrush Threepkiller appears as an easter egg in the LucasArtsvideo gameStar Wars: The Force Unleashed II, which was released on October 26, 2010. He is one of many skins that the player can unlock for Starkiller, the playable character in the game. The skin can be unlocked in the room containing the Threepkiller statues in the Western Arch of Tarko-se.[1]
As stated in the digital art book section of the Starkiller Mimobot, which was included with the Collector's Edition of The Force Unleashed II, Threepkiller was conceived for the game while the design team was looking for new unlockable costumes to add into the product. Although the artists did not think that anyone would take them seriously when they presented the concept art for Threepkiller to the rest of the team, the other members, all Monkey Island fans, agreed to the idea. Although the artists also made concept art for Monkey Island characters Elaine Marley as Juno Eclipse and LeChuck as Darth Vader, Threepkiller was the only one to be added into the game. The artists used bits and pieces of different rough sketches to come up with a Starkiller version of Guybrush Threepwood, whom they also considered naming "Guy Brushkiller" or "Brush Guykiller."[9]