Viratron Epsilon Upgrade

The Viratron Epsilon Upgrade is a Viratron Upgrade type piloted personally by Marcus.

The first time one appeared, it was alongside the other four Viratron Upgrade types at the time. Donald Davenport was unable to identify its signature at first, as it had never appeared from Douglas's evil lair but Leo was able to identify its make, likely from Davenport Industries files. Gear Ace was able to destroy it, throwing Marcus into the water.

The second Epsilon Upgrade the Lab Rats faced was during the Rats' raid of the evil lair. Marcus uses it to go up against Chase & Gear Ace. The Viratron Epsilon Upgrade was destroyed in the same episode.

It was assumed that Marcus had died in the resulting explosion. That, however, was later proven false.