In Star Wars: The Force Unleashed 2 for the PS3, Xbox 360, and Wii, you can unlock a costume to look like Guybrush Threepwood from the Monkey Island game series.
Toward the end of the second level you will encounter a hologram of Jabba the Hutt. Destroy the three slot machines in front of the hologram to receive a red holocron that will unlock the Guybrush Threepkiller costume.
Pause the game and select Costumes to choose a different costume.