She is a pixel doll done on a base by the Starving Artist, Kenly Bop. I would link but I think it's against the rules. She's finished, but I plan on pixeling a betta and adding a background later.
Also, pixel dolls are done on the computer, usually starting with a base doll (similar to a barbie doll) without any hair/clothes/etc. You then draw whatever you want them to wear plus their hair and etc. and shade them, similar to a pen-n-paper drawing, only using little square pixels.