I'm not a fan of My Little Pony but your design is beautiful! She's delicate and reminds me of a Lolita which I love! I don't know if you're aware but there's an artist named Silverbeam on here and etsy that makes MLP BJDs that you could customize as your pony
Your artwork is lovely. She looks to delicate and refined. Also just throwing this out there but there is actually a pony bjd on etsy [link]? . Though it's more of a philly rather than a mare like yours. But still it's kinda cool.