These are Chewbaccas combined with other famous characters, mostly from books and stuff.
This is what you get when you combine the greatest, hairiest Rankin/Bass villain ever to terrorize the North Pole with the greatest, hairiest George Lucas sidekick ever to terrorize the Galactic Empire. What do you get? The Bumblebacca, of course! And, for extra points, we've thrown in Herm Solo as the rogue protector of Rudolph! (thanks, Janet)