Song That Might Play When You Fight Sans

"Song That Might Play When You Fight Sans" is the 72nd track in the Undertale Soundtrack. It is similar to a sped up version of the song "sans." This song is unused, and Toby Fox may have added it to the soundtrack to misguide players into believing that Sans would have a battle in the Last Corridor in a Neutral Route. It is also not a hidden song on the soundtrack, further implying it would have played during a Neutral Route.

Trivia

 * This song is not in the game's files.
 * Much of this song is made with instruments from the SNES version of Mega Man X3, particularly its iconic guitar sounds.
 * This song bears a striking resemblance to the final boss theme of Yoshi's Island: "Giga Baby Bowser."
 * If you speed up "sans.", it sounds similar to this.

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