Ganbaruger was given to 3 children from Aozora City by Eldran to fight against the Great Demon World. It is comprised of 3 core robots, namely Go Tiger, Mach Eagle, and King Elephant. Its pilots are Kotarō Kirigakure, Yōsuke Kazamatsuri, and Rikiya Ryūzaki.

The command "Miracle Combination" is input to the commander to begin the combination into Ganbaruger.

Its finishing move is the Ganba Final Attack, where it traps the enemy with energy tusks from King Elephant's head shield and uses that shield to strike the ground which generates the Ganba sword.

Ganbaruger's debut was after Eldran had arrived on Earth to reseal the demon king and ruler of the Great Demon World, Gokuaku after the seal was accidentally broken by Kotarō's father. It is sent by Eldran to chase after Yaminorius, the servant of Gokuaku sent to conquer the Earth for their realm. The two clashed all across Aozora city as balls of light, even entering the Kirigakure household, until they got blown back by their respective impacts. Ganbaruger separated into Go Tiger, King Elephant, and Mach Eagle when it crash-landed in a forest near the three boys as they were heading for a baseball match. They hear this and head to the scene. Once there, they see the core robots lying from the crash and board them. When they do, Eldran introduces himself to them and entrusts them with the Ganba braces and control over each robot to battle against the Great Demon World in his stead.