This is how Galvatrain reveals that he is Megatrain's clone in Galvatrain's Ressurection.
[Galvatrain is seen in a burning warehouse, fighting Smokescreen and Thomas. Galvatrain blasts Smokescreen, knocking him backwards]
Galvatrain: Turns out I wasn't born from Megatrain after all.
Thomas: What do you mean?
Galvatrain: I mean, I am a clone of Megatrain.
Galvatrain: You never knew that until now.
Thomas: You evil... [punches Galvatrain]
Galvatrain: [gasp] How dare you?!
[The two bots get into a sword dual as Smokescreen watches]
[Back on the Nemesis, Spencer is puffing along in one of the coridoors and soon spies Megatrain's old body parts]
Spencer: Megatrain. I'm sorry. [starts to puff off but is soon blinded by a bright light]
[Megatrain's old body starts vibrating, jumps out of its case and fastly consumes Spencer. Back on the battle field, Galvatrain hits Thomas]
Galvatrain: [evil laugh]
[Suddenly, a familliar voice is heard]
Galvatrain: Huh? [is pounced on by someone] Dahh!
[Galvatrain looks up and sees who the figure is]
Spencer: Now it comes down to just you and me. Or should I say, you and you.
Galvatrain: Spencer. In my old bodie's body.
Spencer: But with the lack of my train form, of course.
Galvatrain: But how?
Spencer: Well, let's just say that I have a few upgrades.
[Galvatrain throws Spencer off and the two start fighting. Thomas gets up and runs over to Smokescreen]
Thomas: Let me help you up, Smokescreen.