There are probably many Herobrine mods out there.
He is only in if you add him by a mod, there are many.
you can not meet Herobrine on either PC, XBox, or Pocket edition as he does not exist and never has. i'm sure there are mods for the PC for Herobrine, and if you really wanted to you could hack you mobile device and input a mod for Herobrine on Minecraft PE but i do not recommend this
You'd need to be playing the PC version and install a Herobrine mod. The conditions to make him appear would be outlined in that particular mod, they'd all be different.
In order to spawn Herobrine in Minecraft 1.3.2 you have to download the mod "Herobrine". Just Google "minecraft herobrine mod
actually no, Herobrine is only obtainable through a Mod
Herobrine does whatever mod you've used to add him in, says he will do.
Herobrine is a Minecraft urban legend, he's not in the game unless added by a mod.
Herobrine is a myth in minecraft. There are a number of mods that can add him in, the method to spawn him will be explained by the mod you choose.
Herobrine has never been "in minecraft" except for in mods and as the hacked account that started it, if you've deleted a Herobrine mod, you'll need to reinstall it. If you are genuinely talking about vanilla minecraft, then you can't add him again.
You can't mod the XBox 360 version of Minecraft.
I'm sorry to say herobrine is myth in minecraft Notch said it himself! But if you have a mod then no.
It depends what mod you are using, you'd have to follow the instructions outlined in whatever Herobrine mod you have.