Discord: you want to know the true. anon? well , were you come form in your past live , you be the worst guy ever! you hurt other by all kind of way! plus with no magic! the last persone you rude and take her live, curse you with her magic and say this to be for you kill her, she say : for all you done, in your next life , a magical pony will turn you to a little girl pony and you will never be back who you be! , alther all she say , you kill her to a very way and is worst of all you a done! befor to get kill by a knight with a sword! so you get what you dezeve!  
Filly Anon:…..i am doom!  
Discord: well? yes in one way and a other is a chance to be a better pony! remender! you cant be a human a again! the curse use on you is very powerfull! my magic is not work on you for reverse the spell twilight use on you! you be luck twilight be kind for be your new mother! you and i know very well , your life as human befor be turn to a filly be …not a happy life! is you chance to be happy now or be a little jeck all the time you be! the desision is your!  
Filly Anon: i am fuck! i am to mad to think of it!  
Twilight: well , why do sleep? is help you o calm down!  
Filly anon: ….why not! stupid life! all this is not funny!  
Twilight: yeah! life is not all the time funny! sleep well my little filly!  
Filly Anon: shut up Sparkle and read your stupid book!  
Twilight: yeah,yeah! i read my book! is will be very long to rise her! oh well!  
Twilight:

you ask if you be horrible person in your past life? well the reason is yes and you be hate be the all world and all  
person curse you! so you get what you dezeve!

@Tetrominon  
Heh, spoiled.  
“You’re the one who made me a little girl the color of moldy milk!”

anonpony just keeps getting cuter!

I’m not sure if being raised by Twilight is going to result in any significant behavior improvements.

@Background Pony #7FD8  
I also forgot an e at the end of ejaculate.

*must’ve

“You’re not my mother, you ejaculate encrusted lavatory.” Fucking brilliant. XD

“Done acting like a spoiled filly?”
 
Ex-CUSE me?

@That One Guy  
There are some on fimfiction. In fact, there are entire groups dedicated to stories involving age regression and gender transformation.

A thread on MLP has a bunch, that’s where most of this Anon Filly content is coming from.

Are there stories with this kind of plot?  
I’d like to read something similar to this.