This is a pig sprite that I drew that could be a boss in my new game. Or it could just be a picture of a squealing pig that is rearing up on its hind legs. I'm no good at shines so help me with that. The grass is crappy so: Please give lots of C + C!
Anatomy is looking pretty off. Try fixing it up, and make the lines smoother. Shading on the left also looks kinda pillowy, I'd clean it up if I were you.
Looks like a horse. A pink horse.
Do what Devicho said, and try making the back legs smaller.
My opinion is that you should first finish a sprite before going to another one.
So what I'm trying to say is finish the custom mario so you can learn from that experience and implemented what you learn to other sprites in your future.