sentences:  The two Irken leaders, known as The Almighty Tallest (Wally Wingert and Kevin McDonald), rule the Irken Empire together because they are the tallest individuals in their society and exactly the same height.As recounted in series premiere, "The Nightmare Begins", Zim is a delusional Irken outcast who is very short, and also overzealous, narcissistic and megalomaniacal.He was banished to the Irken food court planet, Foodcourtia, for absentmindedly nearly destroying Irk and his own race during their first invasion known as "Operation Impending Doom I".