These are Chewbaccas combined with other famous characters, mostly from books and stuff.
Horton Hears a Whobacca
"On the 15th of May, in the jungle of Kashyyyk,
In the heat of the day, in the cool of a mud slick,
He was splashing...enjoying the jungle's great joys...
When Horton the Wookiee heard a small noise."