Zanda Claus, as nicknamed by Doraemon and Nobita, whose real name in his world is Judo, is a giant robot that appeared in Doraemon: Nobita and the Steel Troops and its remake, Doraemon: Nobita and the New Steel Troops: ~Angel Wings~.
As a preparation for their invasion on Earth, the sapient robots of the planet Mechatopia sent parts of Judo down to Earth's North Pole. They also planned to send down the female robot, Riruru, to assemble him and to build a base for their invasion force. However, Nobita found Judo's first part, his brain in the shape of a ball that emits signal to call other parts, and took it to his house in Tokyo. Thus, all of Judo's parts landed in his backyard instead of the North Pole, where Riruru arrived and tried to look for them. Nobita and Doraemon decided to assemble the giant robot in a parallel world, connected to the real world through the combination of "Fish pond inside the room" and the "Reversed world oil". However, in the assembling process, they left the ball back in the real world as they didn't think it would be the robot's brain. The two finished assembling the robot and named it "Zanda Claus" and with the "Mini robot controller" were able to make him move without the brain.
Riruru, following Judo's brain signal, arrived in Tokyo, and had Nobita, who didn't know she was a robot, taking her to the parallel world. Nobita, feeling guilty for taking "her" robot, gave it back to her and also gave her the "Fish pond inside the room". With Zanda Claus and the portal to the parallel world, Riruru built a base in that world for Mechatopian invasion troop. However, her plan was foiled by Nobita and Doraemon, and both Riruru and Zanda Claus were buried underground.
The main characters later learnt that in the real world, Zanda Claus's brain has sent the signal to Mechatopia's troops. They succeeded in modifying the brain so it would became their ally. After entering the parallel world again through another portal (Shizuka's bath tub), they put the modified brain into the buried Zanda Claus and it became a part of Earth's anti-Mechatopian force.
Powers and Stats
Name: Zanda Claus (nickname), Judo (real Mechatopian name)
Classification: Sapient Robot, Mechatopian
Speed: Hypersonic flight speed
Striking Strength: Unknown
Stamina: Limitless due to being a robot
Range: Hundreds of meters with plasma blasts
Standard Equipment: Plasma cannons equipped in his torso (his eyes in anime), missiles on his shoulders (anime)
Intelligence: Quite high
Weaknesses: None notable