Nemesis (G1)
The Nemesis was a legendary Decepticon warship that factored heavilly into most Generation 1 continuities.
Fiction
Marvel Comic Continuity
Dreamwave Comic Continuity
American Animated Continuity
Generation 1 Animated Series
The Nemesis was the ship used by the Decepticons to pursue the Autobots. It crashed into the ocean since there was no one left to pilot it.
In 1985, archeologists eventually discovered the ruins of the Nemesis in South America. Once Soundwave relayed the news to Megatron, the Decepticons deployed immediately. Once they arrived, Megatron removed the Nemesis' power-source, the Heart of Cybertron. Hook then installed the Heart inside Megatron, giving him near-limitless power. Megatron then attempted to use his newfound power to destroy the Autobots, and almost succeeded, until the Heart of Cybertron was removed from his body and destroyed by Perceptor, Brawn and Bumblebee.
Beast Wars
The Nemesis was a legendary warship, the most powerful ever built. According to myth, it was responsible for shooting down the Ark. It was revealed in the series finale that Tarantulas had discovered the wreckage of the Nemesis, and had been refurbishing it for unknown purposes. Following Tarantulas' death, Megatron discovered the rebuilt ship and commandeered it as a last ditch attempt to rewrite history and destroy The Ark.
Using the Nemesis's awesome power, Megatron managed to kill Tigerhawk as well as Inferno and Quickstrike by accident.
