"Herobrine, is the subject of a community-made "creepy-pasta" (creepy story). He is one of the major community icons of Minecraft. Herobrine has not been present in any version of Minecraft.
There are no references to him at all in the source code, and there is no code to allow for any entity to act like Herobrine. There is no level terrain code to generate redstone torches, 2x2 tunnels or elaborate dungeons with traps.
There is no possible way Herobrine can ever exist in any unmodded clients or servers. Any claims that he is in Minecraft are completely false. Any appearances he may have are caused by mods being installed. Herobrine first appeared in a single image detailing an encounter. It was posted on the 4chan's /v/ board, and gained very little attention. It stated how Herobrine had appeared in someone's single-player game, littering the map with various pyramids and tunnels. It is the first media to name him as Herobrine.
It was only later that Herobrine grew in popularity, when the Brocraft streamer "Copeland" photoshopped Herobrine into several screenshots to show to his chat. He had recently taken a liking to the story, and wished to be a part of it. After getting largely good reactions, he decided to stage a hoax. He has explained exactly how that took place in an email"
Now knowing that Herobrine was maked in a creepypasta, there are some mods and stages in Minecraft refering to him or Herobrine mod.
¿What do you think?