Sigma Megazord is the combination of Racer, Boat, Jet, and Train Drive Zords. The Racer Zord forms head, and torso, the Boat Zord forms the right arm, the Jet Zord forms the left arm, chesplate and wings, and Train Zord forms the waist, thighs and legs. This Megazord fights the bad guys and monsters. The finisher move is "Sigma Beam" and "Sigma Strike" to finish off the monsters at once. Later, it will combine with Treasure Megazord into the Octane Megazord.