Astrotrain later transported Ramjet and Dirge to the planet Monacus to check up on Decepticon sympathizer Lord Gyconi.When they learned that Gyconi had captured a number of Autobots and brainwashed them into mindless slaves, the Decepticons tried to stow them aboard Astrotrain to take them back to Megatron.Astrotrain used Jero, a corrupt High Priest who was as fanatical as he was ruthless, to further his ends.However, the Autobots Jazz and Perceptor arrived aboard Omega Supreme looking for Cosmos.Typically one of the more easy-going among the Decepticons, even Astrotrain isn't above letting a little power go to his head.While tracking Cosmos, he shot down the Autobot, who had been on a fuel scouting mission, and managed to trick the people of Titan into believing that he was one of their Sky Gods, so that they would mine energy crystals for him and the Decepticons.The attempt was interrupted by the arrival of Omega Supreme, Spike, Carly, and Optimus Prime.Astrotrain engaged in a bad pun, accused Omega Supreme of being too outdated to catch him, and then was the victim of a Cybertronian's impression of a sandworm (see image) before being thrown a few planetary diameters.
He then created an army of trains to help him rule, thinking it was a good idea.
Although he managed to amass a surprisingly large amount of energon cubes, the productive day ended with him flooding the entire city after bursting a water main. The embarrassment of these incidents forced Astrotrain to creep back into the Decepticon ranks quietly... Lord Chumley used Astrotrain's likeness as a lure to capture Tracks and Bumblebee.
Megatron later sent the real Astrotrain (as well as Blitzwing) to go negotiate with Chumley so they could team up to annihilate the Autobots.
Astrotrain transported Megatron, Starscream and Rumble to the lost Autobot colony of Antilla, where they discovered the entire civilization had been wiped out by the deadly Cosmic Rust.
Not heeding a holographic warning from the Autobots, Megatron ventured further into the colony and seized an advanced heat ray weapon from its storage chamber.