This is how Twilight becomes Nightmare Nova goes in My Little Pony Transformers: Revenge of the Sith.
[We see the shuttle land]
Ryan Crittenden: Get to the medic bay. Hurry.
[Outside the medical room]
Doctor Sci-Ryan: Well. I think he is healthy. For unknown reasons. We are losing him.
Ryan F-Freeman: He's... dying?
Doctor Sci-Ryan: We don't know why. He has lost the will to live. We need to operate quickly if we are to save the babies.
Ryan F-Freeman: Babies?
Doctor Sci-Ryan: He's carrying twins.
[Back at the Ryvine hideout, the Romeobots start to fix Twilight]
Twilight Sparkle: Ow! Aaaahh! The pain!
Dan Phantom: You'll get used to it.
[Back at the hospital, Ryan is with Flash]
Nurse Luna Girl: Is it a boy or a girl?
Ryan F-Freeman: It's a girl.
Flash Sentry: Nyx... Oh Nyx.
[Then a boy comes out]
Nurse Luna Girl: And a boy.
Flash Sentry: Matau.
[Back at the Ryvine hideout, half of Twilight's body is encased in armor similar to Nightmare Moon's and she now wears a cape and the Romeobots fetch a helmet and put it on Twilight's head]
[Back at the hospital, Flash
Flash Sentry: Ryan, there's good in her. I know there's still.
[Flash dies. Ryan gasp as he carries Matau. Zeta and Optimus feel sad]
[Back at the Ryvine hideout, Nightmare Nova rises on the table]
Nightmare Moon: Lady Nova, can you hear me?
Nightmare Nova: Yes, master. Where is Flash Sentry? Is he safe? Is he alright?
Nightmare Moon: It seems in your anger, you killed him.
Nightmare Nova: I? I couldn't have. He was alive, I felt it!
[Nightmare Nova stuggles as the Romeobots get broken and breaks free from her restrainments and steps on the floor as Nightmare Moon watches]
Nightmare Nova: Nooooooooooooooooooo!
Dan Phantom: Yes! The galaxy and Ghost Zone are ours! They're all ours! We won't be giving them back now! [laughs evilly]
[Nightmare Nova falls to her knees]