Zim is an invader from the planet Irk, where he is supposed to conquer and destroy the earth. He is incompetent, impulsive, and convinced of his own greatness making him very conceited. Zim attends “Skool” and goes out in a disguise so he can see how everyday things work on Earth. In one episode Zim orders these goggles that let him see the bacteria that’s all over everything. He then stocks up on disinfectant and wears tissue boxes on shoes. He soon figures out that the meat at “Mac Meaties” is germ free; so he covers himself in the meat in order to be germ free.