Papyrus after the blue SOUL mode is activated

Bonetrousle is the 24th track in the Undertale Soundtrack. It's an extended version of Nyeh Heh Heh! with added drums and violin, this song plays after Papyrus unleashes his blue attack.


  • According to an interview with Toby Fox, this was one of the six songs originally composed for other projects. The other five were Fallen Down, Heartache, Nyeh Heh Heh!, Another Medium, and MEGALOVANIA.
    • Heartache, Nyeh Heh Heh!, and Bonetrousle were initially made for another RPG idea that never came to fruition.
    • The artbook states that Nyeh Heh Heh! and Bonetrousle were originally the main battle theme of said idea.
  • "Bonetrousle" is a made-up word. One of the notes Papyrus leaves to the protagonist after capturing them reads that Papyrus is "slightly bonetrousled" with their previous escape. The context suggests that the word might be synonymous with "worried," "flustered" or "annoyed."
    • "Bonetrousle" might also come from the verb "tousle" which means to make something untidy, or "tussle," which means a short, vigorous scuffle.
  • In the Genocide Route, the song is slowed down by 80% (8820Hz / 44100Hz = 0.2).
  • In the game trailer for Undertale, in the segment where Bonetrousle is played, there is a segment of the theme that was never put into the final game (presuming the part all the way to the ending).
  • It has distinct similarities to Unfounded Revenge from Mother 3, such as the timing and the prelude before the majority of the song.

Undertale Soundtrack
1 - 10 Once Upon a Time • Start Menu • Your Best Friend • Fallen Down • Ruins
Uwa!! So Temperate♫ • Anticipation • Unnecessary Tension • Enemy Approaching • Ghost Fight
11 - 20 Determination • Home • Home (Music Box) • Heartache • sans.
Nyeh Heh Heh! • Snowy • Uwa!! So Holiday♫ • Dogbass • Mysterious Place
21 - 30 Dogsong • Snowdin Town • Shop • Bonetrousle • Dating Start!
Dating Tense! • Dating Fight! • Premonition • Danger Mystery • Undyne
31 - 40 Waterfall • Run! • Quiet Water • Memory
Bird That Carries You Over A Disproportionately Small Gap • Dummy!
Pathetic House • Spooktune • Spookwave • Ghouliday
41 - 50 Chill • Thundersnail • Temmie Village • Tem Shop • NGAHHH!!
Spear of Justice • Ooo • Alphys • It's Showtime! • Metal Crusher
51 - 60 Another Medium • Uwa!! So HEATS!!♫ • Stronger Monsters • Hotel
Can You Really Call This A Hotel, I Didn't Receive A Mint On My Pillow Or Anything
Confession • Live Report • Death Report • Spider Dance • Wrong Enemy !?
61 - 70 Oh! One True Love • Oh! Dungeon • It's Raining Somewhere Else • CORE Approach • CORE
Last Episode! • Oh My... • Death by Glamour • For The Fans • Long Elevator
71 - 80 Undertale • Song That Might Play When You Fight Sans • The Choice • Small Shock • Barrier
Bergentrückung • ASGORE • You Idiot • Your Best Nightmare • Finale
81 - 90 An Ending • She's Playing Piano • Here We Are • Amalgam • Fallen Down (Reprise)
Don't Give Up • Hopes and Dreams • Burn in Despair! • SAVE the World • His Theme
91 - 100 Final Power • Reunited • Menu (Full) • Respite • Bring It In, Guys! • Last Goodbye
But the Earth Refused to Die • Battle Against a True Hero • Power of "NEO" • MEGALOVANIA
101 Good Night

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