Phantasm: A figment of the imagination, A daydream or apparition.

Frisk did a full pacifist run in one go, and they're all happy on the surface. Many memories are made with the monsters Frisk had met. But something wasn't right. No deaths happened, no genocide, nothing. But there was something wrong. Something wrong with Frisk.
As normal as Frisk is, they suffer from what is something of what schizophrenia would do. They hallucinate their nightmares, those being hauntings of genocides. But wors