Pikachu’s body is definitely a hard one for me to draw straight from mind. It’s honestly taken me forever just to be able to draw the head and arms right, so here is a dump I made of what I’m trying to structure Milachu’s body like~

Edit: At least one person seemed to be bothered by this, so I'm adding this. In order to practice pikachu's anatomy, I had to use images that I thought would be good to practice with for reference. Here is a ref sheet which I used a couple from: http://static.zerochan.net/Pikachu.full.205350.jpg

http://milachuart.tumblr.com
http://www.patreon.com/milachu92