I get asked alot of questions on how to make pony plushes. I really don't think I'm the best person to ask since I'm a total noob, but I will try to help! First off, you need a pattern. I don't sell or give out my pattern, but there are plenty of nice ones online! All it takes is a bit of searching but I'm going to make that part easy for you.
PlanetPlush's Minky Pony Pattern -
The pattern: https://www.etsy.com/listing/249809440/planetplush-minky-pony-sewing-pattern?ref=shop_home_active_1
BabyLondonStar's kawaii pony -
The pattern: http://www.members.shaw.ca/plushie/patterns/pony/p1.jpg http://www.members.shaw.ca/plushie/patterns/pony/p2.jpg http://www.members.shaw.ca/plushie/patterns/pony/p3.jpg
The Tutorial: http://www.members.shaw.ca/plushie/pa