All Creepypasta's are fake.
The whole point is to un nerve and possibly scare the reader.
They're like ghost stories.
The only Creepypasta's that are real are usually made into ROM's or mods for PC games.
But as mentioned Creepypasta's are fake. All you need is too think of something scary and boom.
You can create a Creepypasta about anything. GTA, Bully, Spongebob, TV, A haunted DVD a cup a picture etc.
Here are some of the most known Creepypasta:
BEN (Majora's Mask)
Pokemon Lavender Town
Jeff the Killer
Herobrine (Minecraft)
WHO WAS PHONE?!?!