It is a big robot built entirely by sand. It wears armor and has two big claws instead of hands. It has the letter P in the center and Patrick controls it from the top.
Role in episode
The robot is made by Patrick to win the sand war. Its enemy is SpongeBob's sand tank, which SpongeBob makes to destroy Patrick. After SpongeBob destroys the robot with his tank, Patrick uses the robot's detached head to fly away, carrying SpongeBob with him. SpongeBob falls into a sand plane and he and Patrick have a huge airborne battle.