Herobrin is a mithical enemy in minecraft he is said to be notches brother but nobody really knows ... by the way if you dnt know who notch is hes the creater of minecraft
the resounding answer is NO! herobrin never existed in minecraft. it was most likely a mod or a hoax put on by a very bored person. Notch has actually said this
No. Herobrine is a myth generated by fans and possibly the creator. Google it if you want to know more, but I am almost positive herobrine doesn't really exist. And if he does, hes probably not in the pocket edition yet. :D
No, since there's no way to mod the PE version, you can't install a Herobrine mod.