Doomsday

The Doomsday (ドゥームズデイ Dūmuzudei) is the Decepticon flagship during the early centuries of the war over the Mini-Con robots.

Armada cartoon
The Doomsday attempted to intercept the Mini-Con starship Exodus as it fled Cybertron. However, between it and the prize was the Autobot flagship Hyperion and a host of smaller fighter craft. Thus, the Mini-Cons escaped. It is unknown what became of the Doomsday since.

Ask Vector Prime
In the Beast Wars of Aurex 615.03 Epsilon, the Doomsday was dispatched to Alpha Q's universe with several Decepticon-aligned Mini-Con teams aboard.