The Thundersaurus Megazord is the primary figure to fight Mesogog's enlarged monsters. Comprised of the Tyranno, Tricera, and Ptera Zords, the Megazord yields many different and unique attacks. The Tyranno's head can be used to bite enemies within close range. It can also launch a stream of fire. The Tricera's horns can be rammed into an enemy. The Megazord can also use other zords to interchange different parts such as arms.
The Thundersaurus can use the Dino Drill finisher to penetrate into an enemy's armor as it leaps into the air and strikes through its target. It is often used after Ptera Rang to finish off an enemy.
When the enemy becomes transparent, the Megazord uses its Seismic Reciever and fires the Tyranno Tail when it spots its location.
The Thundersaurus Megazord can use the Ptera Rang like a boomerang to hit enemies from long range.
The Cephala Zord can attach itself as an arm, enabling the Thundersaurus Megazord to use the Cephala Power Punch. The Megazord places itself in a boxing ring and takes continuous jabs at the enemy using the Cephala Zord until the enemy is destroyed.
The Dimetro Zord can attach itself also as an arm, enabling the Thundersaurus Megazord to use the Dimetro Blade finisher, where the arm saw makes a "T" shape using the saw.
The Thundersaurus Megazord can get a ride using the Stegazord. The Stegazord opens up its back to the Thundersaurus Megazord where it attaches its feet. The Megazord can now fly through the air or ride through the waves.
The Parasaur Zord can attach itself as an arm, providing the Thundersaurus Megazord with the Final Cut attack. The Megazord stabs its target with the arm, snipping its target, eventually cutting it into pieces.