I give Pinkie Pie a gold ‘sweet tooth’ because I would imagine that based on her general diet, she probably had major tooth decay. When she goes in for dental work though, she gets a cheap gold tooth instead of something more natural because gold is shiny and it’s fun to have her own special sweet tooth.
 
I also understand that many who draw Pinkie with diverse body from the other characters like to make her pudgy/thicc (or as I say curvy), but with how much energy she expends I just can’t make myself do it.
 
The rest is pretty self explanatory, but for specifics, I gave her very rounded, pronounced floof compared to my other characters with either softer or sharper fluff.