It is a big robot built entirely by sand. It is wearing armor, and has two big claws instead of hands. It has a "P" in the center and Patrick controls it from the top.
Role in episode
The robot was made by Patrick to win the sand war. Its enemy is SpongeBob's Sand Tank, which SpongeBob made 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.