This is how Twilight vs. Midnight goes in My Little Pony: Equestria Girls: Rise of the Symbiote.
[Twilight sits in her room]
Radio: It seems the Predalien we thought to be long gone is back.
Twilight Sparkle: Midnight.
[Twilight goes to get her friends but then looks at her black skin and decides to handle it herself]
Midnight: What do you want?
Twilight Sparkle: Remember Midnight Sparkle? She's gone! And you will be soon too!
Midnight: What does it matter to you anyway?!
Twilight Sparkle: Everything!
[Twilight then mercilessly attacks Midnight]
Twilight Sparkle: It's time to pay, Midnight!
[Midnight slams his head into Twilight and punches her down]
[They fight as the room rotates]
[Twilight unleashes a ton of water that washes Midnight away]
Twilight Sparkle: Good riddance.