Papyrus is a skeleton character in Undertale, the role-playing game released by Toby Fox in 2015, and his theme plays when the player faces him in battle. Known as Bonetrousle, the track became closely tied to his optimistic personality and his famous attempts to capture a human. Clips of the melody spread through YouTube edits, TikTok videos and gaming memes, where it now signals a lighthearted challenge rather than a real threat. Fans still recognise it instantly because Papyrus remains one of the game's most beloved characters.