All the song's trigger keys are on the two pages, click next and back to switch pages. Update Log: v 1.0 added all songs up to It's Showtime, plain backgrounds. v 1.1 added annoying frisk and song .sans (G)
I made this by uploading my copy of the Undertale Soundtrack into the Scratch, then added then to a trigger key. Let me know if I forgot any songs. I can add every song of the 101 songs, but I will NOT be adding remixes like Dark, yet Darker or Megalotrousle. All credit goes to Toby Fox. This took longer than you would think to make. I had to drag out 69 (ha ha) boxes and then set 46 of them to a certain key or song. Then I would realize I didn't upload the song and have to wait a minute for it to upload before I could Continue tl;dr : Dragged, manipulated, then dropped lots of code. (scarcastic) Fun. Also 69 code for the songs.