Hypno's Lullaby is a famous Pokémon creepypasta that originated from a dark fan-made song and a sinister interpretation of Hypno's Pokédex entries, which mention the kidnapping of children. The meme gained significant traction through the 'creepypasta' community and saw a massive resurgence in popularity following the release of the Friday Night Funkin' (FNF) mod of the same name. Visually, it usually features Hypno with a menacing expression, often wielding its pendulum. It is primarily used to evoke a sense of dread or dark humor, typically involving scenarios where someone is being lured into a trap or an unsettling situation they cannot escape.