NEZettel said: This one is personally my favorite Pokemon starter design of this generation. I don't what kind of creature it is...but, I like it.
Bulbapedia states that based on the English name, Chespin is a combination of chestnut and pin. It may also be from chinkapin, the name of some species of chestnut.
Harimaron is a combination 蝟 harinezumi (hedgehog), 針 hari (needle), and marron (French for chestnut).