Megatron is the commander of the Predacons, and the main antagonist of two of the Transformers TV series, Beast Wars and Beast Machines. His beast form is a tyrannosaurus rex, a transmetal tyrannosaurus Rex, and a Dragon
Beast Wars
Season 1
Megatron traveled through time to get to prehistoric Earth to find enough Energon to make the Predacons more powerful. With him were Predacons Waspinator, Terrorsaur, Scorponok, Dinobot, and Tarantulas. Dinobot turned on Megatron after their arrival, and became a Maximal after the Predacons' first battle with the Maximals. Megatron was nearly killed in the second episode when, in robot form and on a mountain full of raw energon, he shot a missile at Optimus Primal that was deflected by Dinobot. However, he survived. Megatron was often challenged for position of leader by Terrorsaur, at one point being blown to scrap only to be repaired by Scorponok, who was loyal to Megatron), and at another being locked in a cage next to Rattrap, but escaped it easily. Before the latter, however, Megatron got a new Predacon on his side; by intercepting a Maximal stasis pod he reprogrammed the protoform as a predacon, and it became Blackarachnia. Later, he had another protoform reprogrammed into a Predacon named Inferno. Season 2Edit At the beginning of Season 2, Megatron was turned into a Transmetal by the quantum surge, and gained the
Transmetal Megatron
ability to fly, like Optimus could. He also got two new Predacons to replace Terrorsaur and Scorponok (who both fell into a lava pit during the quantum surge, though no one seemed to notice except Blackarachnia) The two Fuzors, Quickstrike and Silverbolt. However, Silverbolt had no characteristics of a Predacon, and soon left Megatron and joined the Maximals. Megatron soon got Protoform X, naming him Rampage, on his side by torturing him using a piece of his spark.
Season 3
At the end of Season 2, Ravage came to capture Megatron with help from Tarantulas, however they soon found out that Megatron was following orders from the original Megatron all along. Megatron found Optimus Prime inside the ark, and attempted to destroy him to put an end to the Maximals. However, Optimus Primal took Optimus Prime's spark, turning him into a Transmetal II, and Blackarachnia switched sides.
Soon the Maximals' base was destroyed, and an attempt by the Maximals to retrieve their defense system, Sentinel, failed as the Predacons got Sentinel instead.
Megatron made a clone of Dinobot (who was killed in Season 2), called Dinobot II, and a Transmetal 2. Tarantulas and Quickstrike betrayed Megatron, throwing him into a lava pit after he absorbed the original Megatron's spark, but achieved Transmetal II and therefore survived the lava. From here, Megatron's beast form was a dragon, and he threw Tarantulas away, nearly knocking him into the lava as well. He put
Transmetal 2 Megatron
Quickstrike on trial, but the trial was interrupted. Tigerhawk, possessed by the Vok, destroyed the Predacons' base. Shortly afterward, Tarantulas extracted the Vok from Tigerhawk but accidentally destroyed himself and the Vok. Megatron soon found the ship, the Nemesis, and used it to destroy Tigerhawk and attack the protohumans (inadvertently killing Quickstrike and Inferno in the process). Dinobot II betrayed Megatron after Rampage was killed by Depth Charge, and informed the Maximals of a shuttle they could use to get back to Cybertron. He was killed in the explosion of the cockpit, and Megatron was captured by the Maximals and chained to the hull of the ship as they went back to Cybertron.
The only other Predacon to survive (and to not become a Maximal) was Waspinator, who was being worshipped by the protohumans in the final scene.
Beast Machines When Optimus Primal and the others were returning to Cybertron, something went horribly wrong. Optimus, Cheetor, Rattrap, and Blackarachnia found themselves in their original beast form and can't transform back into their robot modes. What's worst is that Rhinox, and Silverbolt have dissappeared, and army of evil transformers known as vehicon are searching for them, but worst of all they were infected with a virus that will kill them if they remain in their animal form.
After they manage to become a hybrid of machine and animal they eventually found out that it was Megatron that was the one responsible for all this. They also found out that they lost the Beast Wars and Megatron took over Cybertron. They also found out that he kidnapped Rhinox and Silverbolt and corrupted them to become Jetstorm, and Tankor. He also modified Waspinator and made him into Thrust. Optimus also found several survivors and learned that cybertron was once a planet that contain plants. So Optimus desided to help Cybertron by making it into a hybrid planet with both plants and machines But Megatron wants it to keep it all machines, and make him 100% machine.
Megatron was finally killed when Optimus Primal, in their final battle, pushed him into the organic core, destroying both himself and Megatron.