Mini-Con Ark

The "Mini-Con Ark" is a creation of the Moon-stationed Mini-Cons under command of Dualor. Cleverly disguised as something that does not resemble a ship at all, it is in fact a ship - one made to travel to other regions of space, hypnotize the Mini-Cons there to come aboard and bring them into the safety of the Mini-Con Moonbase. It is equipped with a forcefield that allows Mini-Cons and Mini-Con-related machinery to pass through, making a very effective defense against bulks.

"That "thing" was an ark, designed to deliver Mini-Cons from the clutches of the Decepticons and, yes, the Autobots too."

- Dualor

Dreamwave Armada comic
The Moon-stationed Mini-Cons saw the reactivation beacon that indicated some of their kin were alive on Earth. Dualor didn't act immediately, but when the Autobots and Decepticons came to the planet to reclaim the Mini-Cons there, he considered himself out of options and sent an 'ark' to fetch them.

Landing in a cornfield in Tranquility, Kansas, at night, the ship first established a forcefield around itself, then used Earth's satellite system to spread its signal across the globe. At about 16:00 next day, the signal caused all Mini-Cons on Earth to lose their thought process and answer the call to board the ship. However, since some of them were already associated with either of the two factions, those too were drawn to the ark in search for their allies and servants. The Decepticons arrived first and were close to capturing some of the hypnotized Mini-Cons when the ship's weaponry activated and attacked the bulks. The Decepticons focussed their gunfire on the ark, futily due to its forcefield, until the Autobots arrived and the two factions came to fight each other. With the bulks distracted, only the humans present realized the Mini-Cons were still getting abducted. Not knowing what better to do, Rad ran forward into the ship before its doors closed. A moment later, the ship took off, leaving an interesting engine mark in the field to the agape spectators.