Frisk, Grillby and Undyne as Centaurs

I was practicing centaurs, and then a wild idea appears : "What if i try to do Undertale characters as centaurs ?"
And here we are, with the easiest character. Seriously, i wonder how i am supposed to make Monster kid or Alphys like this xD
If you want to re-use it, or take the design, please ask before.
It's not that hard to ask, and the response will probably be "yes".