I made a post in the current pokemon thread a few months ago where I complain- wait, no- where I considered as to why there is no art to be found of female (and not male) Bibarel. I even provided a sketch that I made of the concept in that thread.
The official design of Bibarel is just a giant, plump, and dopey looking beaver. Fanart of Bibarel typically depict this pokemon as being masculine, as the dark brown hair around its mouth resembles a beard, just as with the design of Diggersby. However, by just reshaping the rear legs to be longer and adding a few feminine features, I say there is potential for a great design.
Considering all of the many other pokemon that are often featured in such fat-themed fanart, I am baffled as to how female Bibarel specifically is an exception.