Zanda Claus is the robot built by Nobita whose real owner is Riruru. When he found a bowling ball at north pole, the lights of the ball started blinking and many parts of the Zanda Claus fell down. With the help of Doraemon, Nobita built the robot and controlled it with a gadget of Doraemon. When Nobita got to know its was Riruru's robot, he gave it to her. Later, they found out that that the bowling ball (Nobita named it Pippo when it's ball hatched with Doraemon's gadget) was the brain of Zanda Claus. Zanda Claus had helped to fight with the steel troops.