Bonetrousle comes from Undertale, the 2015 role-playing game created by Toby Fox, where it plays as the battle music for Papyrus, the enthusiastic skeleton who hopes to capture the player. Its mix of brass, piano and a fast, catchy melody made it one of the game's most recognisable tracks, and fans soon shared extended loops on video platforms for longer edits and streams. It remains popular because it instantly signals Undertale, adds humour to confrontations, and works as upbeat background music for gaming content.