>>50239230>>50239555Ursaring's shoulder frills come from native american clothing. Because native American tribes usually placed the bear as very important to their culture. The frills divert rainwater and help keep it off the clothing.
Considering even Bulbapedia does not mention this, it's safe to say close to zero people have ever realized this and I'm PRETTY CONFIDENT whoever designed Ursaluna had no clue why Ursaring had the frills, and just stuck them on because the prior stage had 'em.