wario apparition

Wario apparition is a Super Mario 64 theory, derived from a creepypasta post on 4chan. In that post the Wario apparition was described as a large, floating Wario head which chases you down a hallway and draws its powers from mental instability. Once its powers reach a certain point, it escapes from the game and causes memory loss to the player.

Disclamer: this isn't actually a real thing

You want fun? Wario show you fun!
Because this thing is popular for some reason. It's a disembodied Wario head that can supposedly appear in Super Mario 64 and give people stroke-like symptoms and memory loss.