Scourge is one of the most dangerous Decepticons, seeming to become more and more powerful with each incarnation. He is usually depicted as a creation of Unicron or a clone of Optimus Prime. He is often known as Nemesis Prime, in the current generation he is created by MECH.
Scourge is a clone of Optimus Prime, in the Japanese version of this series he is called Black Convoy .
Scourge is called by the name Nemesis Prime in America. but is still called Scourge in the Japanese version of this series. He was only a minor character in the Armada series, appearing in just one episode.
In this series Scourge was a Decepticon from the Jungle Planet who transforms into a dragon in Japan the character is called Flame Convoy. He has two loyal henchmen of his own in this series, Undermine and Brimstone.
A character who is similar to Scourge named Black Lio Convoy appears in this series, but as things stand in TF continuity right now these two are unrelated, not even sharing the Scourge name, though it can be argued that character is that series version of Scourge.
Nemesis Prime was created by MECH on Earth using the schematics of Optimus Prime and parts from Breakdown and the T-Cog of Starscream, he is MECH's ultimate weapon, Project Chimera.
The Transformers: The Movie
Released back in 1986, this was the first Transformer Movie ever made.