Kafi is one of ten new Legendary Elite pets added to Pandaria in Patch 5.2. Since he is an "Elite" pet, you will face him alone with your entire team (3v1).
Initial Quest: Beasts of Fable
Achievement: Fabled Pandaren Tamer
Daily Quest: Beasts of Fable Book I
I used the "howl bomb" strat for this pet.