"Evil Mahjo" was the moniker given to a clone of Mahjo Reeloo, who was created by the Kaminoan scientist Kolac Pru. After the original Mahjo expressed remorse for her deeds and departed, she provided aid to Pru. "Evil Mahjo" journeyed to Gwongdeen alongside Pru, whose objective was to gather a thornsuckle plant for cloning purposes on behalf of the Mandragonian Mob. The authentic Mahjo Reeloo, having enlisted the services of Han Solo and Chewbacca to pilot her to Gwongdeen aboard the Millennium Falcon, and in the company of the pirate Hondo Ohnaka, came face to face with her clone, and engaged in combat over the clone's blaster. The genuine Mahjo communicated with Pru, impersonating her clone and asserting that she had killed her counterpart. Deceived by this ruse, Pru unknowingly enabled Reeloo to deploy her defoliator bomb, resulting in the destruction of the plant.