Cole's Earth Mech

The Earth Mech is the vehicle used by Cole in the third season of LEGO Ninjago: Masters of Spinjitzu. It was a Security Mech under the control of the Overlord until Cole hacked it with his Techno Blade and transformed it into the Earth Mech.

The Surge
When all technology of New Ninjago City was under Overlord's control, the Ninja hacked vehicles with their Techno Blades. Cole hacked a Security Mech, turning it into his own Earth mech. When they were leaving New Ninjago City, the Earth Mech combined with Jay's Lightning Offroader and became the Thunder Raider.

The Art of the Silent Fist
After they left the city, they found a place near Sensei Garmadon's Monastery, the ninja hid their vehicles and Cole used a tree to hide the Earth Mech. It was later seen assembled as the Thunder Raider to escape, but all four of the vehicles were shot down by General Cryptor's Destructoid. Luckily, that was the plan, and the vehicle was on auto-pilot.

Enter the Digiverse
When the ninja were in the mission to stop the Digital Overlord, Jay, Cole and Zane summoned the Lightning Offroader, the Earth Mech, and the NinjaCopter to get to the top of digital Borg Tower.

Codename: Arcturus
When Jay, Zane, Cole and Lloyd used their vehicles on a mission to save Kai, who had been captured by Pythor. They used the ninja vehicles to get to The Lost City of Ouroboros.

The Titanium Ninja
When the ninja were coming back from space, P.I.X.A.L. sent the Earth Mech alongside the Lightning Offroader to meet with Cyrus Borg at The Temple of Fortitude. When Nya was shot down, all five ninja went to save her but they were ambushed by the Golden Master who used Golden Power Spinjitzu to suck in and destroy the Earth Mech and the other ninja vehicles.

Appearances
70723 Thunder Raider

Trivia

 * The Earth Mech is the fourth mech in the Ninjago series.