It depends entirely on what mod you are using to add him in. There are dozens of such mods and each have their own instructions, it's impossible to give a general answer since they are all so specialised. Look at the mod's documentation, it should explain everything.
Its Herobrine and you can't spawn Herobrine in vanilla Minecraft he's a myth.
There is no way to spawn Herobrine in your Minecraft Xbox 360 world, but you can change your skin as herobrine and troll people.
It is not possible to spawn Herobrine for Minecraft on the Xbox 360 edition, or any others, without a modded client. Depending on the mod, Herobrine may or may not be in your other worlds, but likely it will only be on the one.
Whichever Herobrine mod you are using, will tell you how to spawn him.
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 doesn't spawn.
The only way to spawn herobrine in minecraft is to use mods as you cannot spawn him in vanilla minecraft.
you can't.
In order to spawn Herobrine in Minecraft 1.3.2 you have to download the mod "Herobrine". Just Google "minecraft herobrine mod
You can't, he isn't in the game.
I don't believe that Herobrine is in vanilla minecraft. There are videos on YouTube that used the Single Player Commands mod to spawn the discontinued 'monster' (human) mob with the texture modified to look like the legendary Herobrine. The SPC command is 'spawn monster'. There are 'Herobrine' mods, but I have not looked into those.
Herobrine has never been in Minecraft, any edition.