Does the subject want to ask "Why did Tobo become a helicopter"? Official setting. Tobo Brothers is an animation released by Jebsen China Visual Network. In this animation, Tobo became a helicopter because of the official setting. This animation mainly tells the story of twin brothers Kay and Anne living a quiet life with their father, Dr. Dou Yun, but one day the doctor was kidnapped by unknown forces, and then there were unexplained car accidents everywhere in the city. Kay and Anne had to use two Tobo robots left by their father that could be turned into cars.