This was something I requested from Runningtoaster on their Patreon and commissioned to be colored. Wanted to do more with Pinkie Butt, so here we are!

Requested by Firingwall, who asked for
“I would like my OC, Rachel, partially transformed into an anthro male Pinkie Pie. The idea though she is suffering from Pinkie Butt Syndrome where the first thing that transforms is with her bum, getting big, chubby, and popping out of her pants like the bum reference. Part of her hair is curling up, ears are pony ified, and her cutiemark is visible. Even though she is transforming, Rachel is very happy about it and is bragging to her boyfriend, JD, that there’ll be more of him to love. [ref]”