Invader Zim design. Invader Zim Gir's Krixpy Cereal is 100% authentic, officially licensed Invader Zim merchandise! (NICK661) Invader Zim is an American animated science fiction television series created for Nickelodeon. The show centers on an extraterrestrial named Zim, and his mission to conquer Earth and enslave the human race along with his malfunctioning robot servant GIR. Adhesive backing attaches the PopGrip to your case or device. Will not stick to silicone, leather, waterproof, or highly textured cases. Works best with smooth, hard, plastic cases. Not compatible with wireless charging Printed top is swappable with other compatible PopGrip models. Just press flat, turn 90 degrees until you hear a click and remove to swap.