This egg was only available in Egg Cave's Cash Shop Park for January 2015.
If you pluck a feather from a Roarnt egg, a new one will grow back immediately. This occurs to ensure the survival of the egg during incubation.
Newly-hatched and young Roarnts are like high-maintenance puppies that require a lot of attention. Roarnt pups possess enormous amounts of energy; they are hard to keep up with and demand a lot. Normally they are pretty ill-tempered as well (moody and whiny).
A fully-evolved Roarnt, however, is much more agreeable in terms of temperament. They are also more self-sustaining and helpful with completing house-related tasks.
The positive of Roarnts: they don't shed (despite what their appearance may lead you to believe)!