Being a guy, I don’t know a whole lot about the My Little Pony universe. I know my sister used to have some as a kid and I once gave one of them a hair cut and panda make-up. It ended up looking like My Little Child Abuse Pony.
Alternative artists' Spippo obviously had a similar idea in mind when she started making customised My Little Pony figurines. Difference being, she has talent.
The Scandinavian-based Spippo (wears a cape and is hopelessly goth in her profile photo) has been pimping My Little Ponys for a while now. She takes orders and can make you a custom My Little Pony based on whatever weird kink you might have.
Hit her up at spippo.deviantart.com