Pinkie heard it

He looked like a scolded school child whenever he saw me – averted eyes and a desire to avoid me at ever opportunity.

every

“You know, this is why you should be careful with what you say. People get things messed up all the damn time.”

And besides, you might start up a meme.

Every time I dreaded taking a break. I’d avoid looking in the mirror because I hated what was looking back. A gormless looking mare with orange eyes and curly brown hair. That wasn’t me, that wasn’t Gerry. It was a fake – something that’d taken my place a few weeks ago.

I kinda know that feeling.
Also, do you mean "formless"?

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No I meant gormless, I slipped a bit of british slang in, whoops.

“That is a good question. The obvious answer is that somepony must have cast a spell on you; but of course that would be preposterous! I was the first pony to see you; and furthermore who would do such a thing for no good reason?”

https://tvtropes.org/pmwiki/pmwiki.php/Main/AWizardDidIt

“It’s not right either way. If I cast the spell on you, what if we discovered a way to turn you back? Would you agree that your original intent was to become a human again? Or would you insist on staying the way you’d have become? There would be no way of knowing, and no correct answer.”

Aside from that, there's the possibility of "him" snapping back to being a pony, which wouldn't help at all.

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(One Google search later...)
"Lacking intelligence or vitality; stupid and dull." Okay, I get ot.

I'm kinda rooting for Gerry to switch back, but more and more I'm worried that's not gonna happen.

Also, the switching from 3rd to 1st person back is very jarring.

A few things to note. One is that Rarity is a terrible person, and she doesn't care what people say, feel, or decide for themselves. Applejack should just tell Big Mac that Rarity was deliberately doing to opposite of what Gerry wanted, and isctrying to force them together against Gerry's wishes.

Second is that Twilight seems to now be taking this all deadly seriously. Dysphoria really seems like a nightmarish prospect to a pony when you think about it. To have all your physical and magical attributes be changed to something that isn't you, and to be forcibly branded with a Wrong Mark that has no soecial talent, and means bothing except that you are being prevented from being yourself.

Thirdly, they're all ignoring the huge issue if Celestia. All of what was done to Gerry was done at her behest. On top of that, her reaction was uncharacteristically callous to someone whose life she just ruined and she has done nothing to help reverse his condition despite her being involved in the magics that did it. If Gerry's transformation woukd need to be supplied with a truly absurd amount of maguc to be made permenant there shoukd be some kind of source present for it, otherwise it woukd have had a noticeable effect on the enviroment. How convenient that there was a likely source nearby, like an alicorn with enough magical power to casually move the sun.

"I stared out the window. Twilight leaned into Applejack’s ear, “I don’t know what to say"

Not much of a good friend

Twilight I mean

But couldn't help but laugh

This was a awesome and sweet/realistic chapter this is how people would feel if this happened to them.

Oh goody. I look forward to seeing where you go with this. You’re really giving this some solid consideration to the mental state. A lot of people just can’t or won’t do this part. This is why I like your story so much. I’ve been through dysphoria myself and it’s not fun. Yet the reward at the end can be quite nice.

Keep it up and I can’t wait for more!

“I’d rather him not ask at all. It’s already making things awkward.”