There is this Kirin that you can fight that has a broken horn and apprently you can only fight it once normally. I think you fight it before fighting rajang. I watched a fight of it in world and it had a few changes like it being enraged all the time and being able to summon more lighting when it is charged
So I was wondering if in the earlier games you could fight a broken horn Kirin too and this was like a scarred Yian situation except that the Devs didn't recognize the Kirin as a official variation