Media Player for Nightmare Moon from the game, My Little Pony: Pony Fighters. Her quotes are listed below.
 
SELECT SCREEN:  
Everything shall fall to me.
 
PRE-FIGHT:  
How much strong you are?  
Anything dumb, and you’ll pay consequences.  
Let’s not make this too long.
 
(Vs. Princess Celestia)  
Princess Celestia: Your destruction ends here!  
Nightmare Moon: You are not a match for me, Celestia!
 
(Vs. Daybreaker)  
Daybreaker: It looks like you don’t learn, do you, sister?  
Nightmare Moon: Not if I destroy you first!
 
(Vs. Starlight Glimmer)  
Nightmare Moon: You really wanna try me, young lady?  
Starlight Glimmer: I’ll stop you myself.
 
(Vs. Twilight Sparkle)  
Twilight Sparkle: Nightmare Moon!  
Nightmare Moon: This brings back memories.
 
(Vs. Sunset Shimmer)  
Sunset Shimmer: I’ll destroy you!  
Nightmare Moon: So, you’re Princess Celestia’s student…
 
(Vs. Sunburst)  
Sunburst: Nightmare Moon, what are you doing here…?  
Nightmare Moon: You know who I am, huh?
 
(Vs. Princess Luna)  
Princess Luna: I have a bad feeling I would face my dark side…  
Nightmare Moon: Me fighting my own look-alike is so boring.
 
POST-FIGHT:  
Someone like you is not that strong, at all.  
Being defiant to me made it much painful to you.  
Well, looks like everything went quick.
 
(Vs. Princess Celestia)  
Nightmare Moon: Even in recent history, you still cannot win!
 
(Vs. Princess Luna)  
Nightmare Moon: Us, together, means a lot of related stuff.
 
(Vs. Starlight Glimmer)  
Nightmare Moon: Come back when you’re not so-weak.
 
(Vs. Sunburst)  
Nightmare Moon: Never knew this one had such power.
 
(Vs. Sunset Shimmer)  
Nightmare Moon: Too bad. You don’t seem worse than your teacher.
 
(Vs. Twilight Sparkle)  
Nightmare Moon: You may be still an alicorn, but it’s nowhere to my level.
 
(Vs. Daybreaker)  
Nightmare Moon: How about you learn your place instead?
 
IN-BATTLE:  
How’s that?!
 
Not so fast.
 
(Teleportation) Over Here!
 
N-No…!
 
Why…!!!
 
Next time, I won’t lose to you!
 
Super 1: Nightmare Destruction! I’ll end it with a blast. You’re through. That was easy.
 
Super 2: Extreme Nightmare Destruction! Hope you like crying. Haaaaaaaa!!! Too quick…
 
Credits:  
Nightmare Moon by Drakizora: >> 1463413  
Ponyville by BonesWolbach: >> 676205