- This article is about the Stone Army's robot. For Samurai X's robot see here. For the Samurai Mech set, see here.
When Misako stole the Helmet of Shadows, Lord Garmadon pursued her in the Samurai Mech. The Ninja attacked it, but even their new Elemental Blades were useless against the giant machine - only the surprise arrival of Nya and the Earth Driller allowed the group to escape.
Lord Garmadon piloted the Samurai Mech through the forest after the Earth Driller resurfaced, quickly catching the Ninja's machine in his robot's massive hands. After shaking the Ninja up, he had the robot throw the Power Drill across the forest. To Ninja's disfortune, the impact of the throw jammed the the cockpit window to prevent their escape. Lord Garmadon moved in for the final blow, but Lloyd appeared and blasted the Samurai Mech with an elemental beam, bringing the mech to the ground. The mech fell over, seemingly inoperable, and Lord Garmadon was forced to emerge, dazed and vulnerable.
The Samurai Mech was a large humanoid mech, roughly twenty-five feet tall. It had four arms, a horned helmet resembling a simplified Helmet of Shadows, and large, green-glowing eyes. The control chair was situated between the lower pair of arms, and four levers allowed Garmadon to control its movements. It was primarily grey, red, and orange in color.
The Samurai Mech was extremely durable; the Ninjas' elemental powers had no effect, and it charged through a grove of bamboo with ease. It was fast enough to keep up with the Power Drill above ground and strong enough to pick up and throw the smaller vehicle with one hand. It initially wielded an appropriately-sized sword, but abandoned it after the Power Drill knocked it down and the Ninja made their escape.
- The Samurai Mech appears to be based on General Kozu, the Giant Stone Warrior, or Lord Garmadon himself. Its appearance is most similar to the Giant Stone Warrior, however.
- The Samurai Mech is one of a few elements of the television series not to have received a real-life set form.