This is how Twilight's redemption goes in My Little Pony Transformers: Return of the Jedi.

[In the throne room, Nightmare Moon approaches Nyx, her face full of hate]

Nightmare Moon: If you will not be turned, you will be destroyed.

[She zaps Nyx. Nightmare Nova gets up and walks over to her master]

Nightmare Moon: Young foal. Only now at the end, do you understand.

[She zaps Nyx again]

Nightmare Moon: Your fable skills are no match for the power of the Dark Side.

[She zaps Nyx again]

Nightmare Moon: You have paid the price for your lack of vision.

[She zaps her as Nightmare Nova watches]

Nyx: Mother! Please!

[As she screams in pain, Nightmare Nova looks back and forth at her daughter and Nightmare Moon]

[Nightmare Moon zaps her again]

Nightmare Moon: Now, Young Sparkle.... you will die.

[Nightmare Moon zaps Nyx as Nightmare Nova looks at her and anger boils up into rage]

Nightmare Nova: No. [looks at Nightmare Moon] NOOOOOO!!

[Nightmare Nova grabs Nightmare Moon] 

Nightmare Moon: NNNOOO!!

[Nightmare Nova throws Nightmare Moon down a hole]

Nightmare Moon: AAAAAAAHHHHHHH!!!!!!!!

[She then bursts into a wave of energy]

[Nightmare Nova falls down, wheezing badly, signifying her respirator has been damaged]

[Nyx heads over to her]

[We then see Nyx dragging Nightmare Nova to her shuttle and set her on the ramp]

Nightmare Nova: Nyx.. Help me take... this mask off.

Nyx Sparkle: But, you will die.

Nightmare Nova: Nothing... can stop that now. Just for once. Let me.... look on you with my own eyes.

[Nyx removes Nova's mask and we see the horribly scarred face of Twilight Sparkle]

Twilight Sparkle: Now, my daugther. Go. Leave me.

Nyx Sparkle: No. I'm here to save you.

Twilight Sparkle: You already have. Tell Matau that you were right about me, Nyx. [weakly] You... Were..... Right...

[Twilight gasps and close her eyes]

Nyx Sparkle: Mom?

[Twilight dies]

Nyx Sparkle: Mom... I think I let you rest in piece now.

[She then carries her dead mother's body onto the shuttle and flies off]