Since he was dropped into the Laurentian abyss, the Decepticons came to find him and used parts of a Decepticon to rebuild him.
In the second movie Megatron killed him
First movie - Dies Second movie - He is resurrected, does not die Third movie - Dies
I think The Fallen because in the second movie you can see how Megatron is ordered around by The Fallen. In a part of the movie, you can see Megatron kneeling by where The Fallen is sitting and Megatron calls him master or leader. =) Plus, after Optimus Prime gets his extra parts from Jetfire, he slices off Megatron's arm really quick, with almost no effort, but it takes Optimus a longer time to defeat the Fallen.
To eachother: No they are both Male.Starscream: In the second movie after Megatron is brought back to life and goes back the the Nemisis There are Decepticon hatchlings on the ship and Starscream says something along the lins of leaving Megatron to help make the new army. So, yes Starscream did have childrenMegatron: No not that is know by the views of the movie.
Megatron or Shockwave depending on the color
Bonecrusher
there are 3 actually megatron and starscream and the old guy jetfire from the second movie. good luck.
Megatron. He rips Jazz in half in the first movie.
megatron
He was torn into two by Megatron in the first movie.
In ''Transformers:the Movie(2007) Megatron was killed by Sam Witwicky.Sam killed Megatron by using the Cube.Starscream simply retreated from battle back to the Nemesis(the Decepticon Warship).
in the novel and comic sentinel prime and megatron go to cybertron and rebuild it in the movie megatron damages sentinel prime then optimus kills megatron then sentinel prime