Robot Probes

Robot Probes are the tertiary antagonists in the film, Monsters vs. Aliens. They are cycloptic enormous robots that serve Gallaxhar. One of them is send on Earth to found the Quantonium.

Description
The robot probes are some of Gallaxhar's minions and the largest of them. They were possibly created by Gallaxhar originally as miner droids to get Quantonium. The robot probes are roughly the same height as  Insectosaurus only slightly taller. They are protected by an impenetrable deflector shield which blocks all forms of attack, making the robots immune to any of the military's weapons and their feet can crush anything beneath them apart from B.O.B. Their weaponry consisted of powerfully strong arms and claws that were strong enough to haul its own heavy weight body out of a crater or tear down a tall building, though they weren't strong enough to counter the strength of Ginormica. They even possessed a phasoid blaster in its eyeball, though it was only seen in use during the Game. Besides being used as probes, Gallaxhar also intended to use them as troop transports to transport his clone army down to Earth.