Robo-Parents are Zim's artificial and dysfunctional parents. They debuted in "The Nightmare Begins", and have made appearances throughout the series. They are upgraded in "Parent Teacher Night", but have shown to be mostly unusuable when active. There is Robomom, who wears a pink tutu and blue overalls, and Robodad, who wears a simple blue shirt with pink pants. Both are horribly disguised, and Robomom often loses her hand or other bodily parts.