Omega Supreme (Unicron Trilogy)

Omega Supreme is an Autobot in the Energon portion of the Unicron Trilogy.

Omega Supreme is one of the Guardians of Cybertron, who serves under the command of Omega Sentinel and is a powerful Autobot protector. He beleives that unyealding resolve has no conqueror and will not hesitate to engage even the strongest foe. He is composed of a "battle train" a warship and a small robot that transformes into the head of their combined robot mode. (It is unknown if the smaller robot IS Omega Supreme and the large form mearly boosts his size and power, or if "Omega Supreme" specifically refers to the union of all three.)

Energon Cartoon
Omega Supreme is an ancient Cybertronian and single handedly battled and defeated Unicron way back in the distant past of Cybertron. Then a bunch of... um other stuff happened, and anyway, he returned durring the events of Energon and combined with Optimus Prime to fight Unicron again. (Details anyone?)

Toy
Omega Supreme was inspired by the generation one character of the same name, as well as the G1 Headmasters whose gimick he shares.