The Traintron is created when Marcus uses the "gather" Metavirus to infect a Davenport cargo train cab. Unlike other , which had served as beacon-like marks for Viratron Upgrades , Marcus had ordered Traintron to gather energy from the wiring systems in the city by using its pantograph & its Automatic Train Control to detect where the energy is. Its components were uploaded to the Traintron Upgrade, which later arrived to try & siphon the energy already stolen by the Traintron. Marcus later created a second Traintron, whose Viratron Upgrade was turned into the Upgradetron.