Megalovania was composed by Toby Fox and is best known as the music used during the Sans battle in Undertale, released in 2015. Its forceful melody became a major source for gaming remixes, mashups, and joke arrangements across online video culture. This WhatsApp Edition follows that fan-edit tradition by framing the theme as a mobile messaging meme. It remains useful because audiences quickly recognize both the musical reference and the joke of treating a routine WhatsApp notification like an intense boss encounter.