Trixie is a pony of many talents. Some of them are just less developed than others. Remembering names is one such talent. But, she tries, and sometimes she even gets it right!  
Today however was not one such time. Coming to Twilight with her hat in her hands (Metaphorically, for she’d never reduce her own glorious hat to a common cap), Trixie came to ask if, hypothetically, Trixie accidentally shrunk her assistant and stuck her in a jar, would Twilight possibly be able to undo that. Of course, part of charming the almost-equally amazing alicorn was to win over her niece, and that meant addressing her by her full title.  
Unfortunately for Trixie - and later Twilight - Trixie had to make her best guess at remembering the younger princess’s name. She didn’t get it right.
 
For the rest of the day, Flurry heart would only answer to “Blurry Fart.”  
Old idea I had sitting around for a while. Broke it out while trying to get the juices flowing for a commission last night. One thing led to another, and here we are.  
Twilight is going to spend the rest of the day dealing with raucous princess giggles and the same joke over and over again, and she knows it.
 
Trixie?  
Sparkle! You look…  
Um…  
…  
Well that’s not important.  
Let’s say Trixie might, possibly in some way, need your… help.  
Not that she does! Trixie is obviously far too great and powerful a unicorn to need anyone’s help.  
But, if she were to somehow have a, well, Trixie likes to think of it as a “challenge”-  
Spit it out, Trixie.  
Oh fine! Trixie’s latest performance might not have entirely gone to plan, and now her assistant may have gotten turned into a Breezie, and…  
Oh sweet Luna, Trixie, what did you do?  
N-nothing Trixie is sure she can’t fix without a little assistance from an almost-equally talented magician, right?  
You really know how to pour the charm on, don’t you?  
Look, Sparkle, this wasn’t Trixie’s first idea, and-  
Aunt Twiley! Aunt Twiley, look what I- Hey, who are you?
 
Who is Trixie, she asks. Ha! Haven’t you heard of Trixie, little filly?  
Oh do not encourage her…  
Feast your eyes on the greatest, the most powerful, the most amazing unicorn that ever lived! Behold! The GREAT! And POWERFUL-  
Are you the crazy pony Aunt Twiley told me about?  
I… what?  
I liked the part where you ran around with a bear.  
That… yes, that was Trixie.  
Cool!  
…  
You’re Sparkle’s niece, right? Princess…  
Um… (Furry? Hurry? Blurry? Close enough. What else, what else… Art? No, heart! Wait, no, the first name! It started with an ‘F’!)  
Blurry Fart!
 
…  
Did, did she say F-fa…?  
Isn’t that her name?  
It’s going to be for the rest of the day, so thanks for that, Trixie.