Old Kid is a child who makes one quick appearance in the class, but never is seen there again. During the first episode, he appeared in the seat of Smeedge, but after his brief appearance, Smeedge takes that seat again. Old kid is later seen outside of the Skool cheering for Count Cocofang in Career Day. He makes another appearance in the cafeteria when Zim wears rubber gloves and goggles to protect himself against the food in Dib's Wonderful Life of Doom.