 In "Crash of the Titans", Uka Uka teaches Doctor Cortex a new process called "Mojo mutations", which uses a magical substance known as Mojo to mutate any living creature into a loyal minion of Cortex.At the Temple of Zoom, Uka Uka leaves Doctor Cortex to destroy Crash and Aku Aku while he returns to the base with an enormous amount of stolen Mojo and Coco Bandicoot at tow.When Cortex fails to defeat Crash, Uka Uka becomes furious, and announces that he is replacing Doctor Cortex, much to the shock of his minions.