Okay, I'm here to clarify something: The appearances of Golden Freddy on Mobile platforms.
Just because some body says it happens, you shouldn't believe them until you have actual proof, like talking with Scott or doing the actions yourself. So far, Golden Freddy can only appear on PC with the poster. Golden Freddy can only appear on Mobile via Custom Night by typing in "1987" into the menu. Here is a video of it happening (if you don't like high voices then get out of the post).