ZIMM was a war robot, who was worshiped by the cyborgs of Yaled IV. According to ZIMM's sacred punch-cards, the robot connected itself to the Human Xim the Despot via a mind probe, and then transferred the Despot's memories into his Verbobrain.
Sources
Xim Week: The Despotica (Part I) on Hyperspace (article) (content removed from StarWars.com and unavailable)