Although Jayanegara is referenced in the cutscenes of the Gajah Mada campaign and appears as an allied faction in its second scenario, the unit can only be found in the Scenario Editor. As a hero, he cannot be converted and can regenerate health. His stats are otherwise identical to those of a normal King.
In Rise of the Rajas, Jayanegara uses the sprite of the Middle Eastern King despite representing a Southeast Asian monarch. This is corrected in the Definitive Edition.