W4-KZ was built by Tato shortly after the rise of Darth Sidious' Omega Empire. W4-KZ, soon called Wakz by Tato, formed a close relationship with his organic master. Him being a droid also helped Tato in some tough spots from time to time.
The Oppression of OmegaEdit
Wakz will appear in the Oppression of Omega and will aid Tato and others in a strike against the Omega Empire.