Dr. Tsukumo is a young brown haired boy who wears a lab coat with the number 99 on the back. His theory was that man never landed on the moon and plans on doing it without using fossil fuels for a rocket. Dr. Tsukumo creates custom rockets called "Wandaba Mark #" for experimentation. Whenever Tsukumo measures something, he uses the old Japanese metric system consisting of units of measurement like the shaku, the sun, the ri and the koku.