Concept : You're fed cursed pokepuffs by a snobby rich girl who wants a loyal and obedient sylveon..

Since sylveons have a like 87%male to female gender ratio the cursed pastries effect your body. Shift and changing it to a more masculine form.

You aren't the obedient type however and once you realize what the cookies are doing you spit them out hoping to reverse the curse!

It helps but only partially. You're stuck as an amalgamation halfway between human and pokemon. Fighting new instincts and a unfamiliar body..

Plus you're now trapped in the rich snobs mansion and must escape!

It feels really really hard to resist even the twisted scraps of affection that Rich snob is giving you because like... you're a friendship evolution. And you're a forced friendship evo, youre not supposed to have happened. And so your body/aura/whatever it is that makes pokemon evolve is like.. "why this bitch empty?? Go get that affection!!!!"

Being petted or called a good boy or fed something sweet just makes you go all fuzzy. It's like being touch starved but to the max

You dont have to worry about transforming further (cause the tf curse has like solidified and cant be altered more) so you can trust the food your given. And you're being pampered and lavished with gifts.... but you know it's a gilded cage.

She only values you cause your a beautiful oddity plus youre a shiny... she dosent like it when you disobey and she has a henchman/butler Ala Max from Cats dont Dance that she call upon to threaten you if you get too disobedient..

You've gotta make your escape.

EDIT Second Image: I was daydreaming a bit more about this whole messed up tf scenario and wanted to do a little bit of a follow up exploring how the extreme touch-starvedness manifests. So enjoy this toxic dynamic moment ^^