Frax created Dragontron after leaving Ransik. Frax wanted to use Dragontron to conquer Earth in the past. Frax wanted to make Dragontron as the most powerful robot, which he ever created.
This super robot was armed with highly powerful lasers on his head and they were also embedded in his chest and shoulders. He also possessed incredible physical strength. Plus to his incredible power, Dragontron also possessed ability to regenerate, such as regrowing his lost limbs.
Frax activated Dragontron and attacked Silver Hills. At this time Alex served as the Red Ranger. Rangers battled Dragontron with their Shadow Force Megazord, but Dragontron was too powerful for them, so Frax nearly won, but he was driven off when Quantasaurus Rex, summoned by Eric, interrupted the battle. After that Frax left.
Then Frax returned and again battled the rangers. During the second battle, Time Force Megazord Mode Blue battled Dragontron, trying to get a clean shot at its power core (its one weak spot), while Time Shadow Megazord distracted it, but Frax's siphon drained them of energy. However Wes destroyed the energy siphon, which supplied Dragontron and Alex made him the Red Ranger again. Now under the command of Wes, rangers battled Dragontron with the Megazord in Mode Red.
When Q-Rex joined the battle, the rangers had the Megazord jump on its back, ride the Q-Rex to Dragontron and once it was close enough, jump over Dragontron, it was able to stab Dragontron in the power core, before Dragontron could react, finally destroying Dragontron.
- Dragontron's body had it's artillery removed and given the head of one of the Gatekeepers where it appeared in "Boom" as one of the patron's at Piggy's cafe.