Lore: On one of your genocide runs, something is off, Sans is not present at all. You don't even meet him in Snowdin. He finally appears in the throne room, Asgore nowhere in sight(an earlier note in New Home tells you he evacuated). Behind him he brought a large, clock-like machine(cause I didn't want to make a design for the machine) which he uses to purposely reach into other timelines to bring a Neutral Sans and True Pacifist Sans to this timeline to assist his endeavors. Inevitably, you try to appeal to True Pacifist Sans with mercy, but by then he's already given up on you. In the end, you break the machine and the time paradox is no longer able to be sustained, sending the Neutral and True Pacifist Sanses back to their timelines. Tired and weary, Genocide Sans is unable to dodge your final attack against him, ending in another completed genocide run. Also, this leads to two other fights as a result of Neutral and True Pacifist Sans finding out about your genocides but that's for another time.

Credits:

Undertale by Toby "Tricky Tony" Fox

Music(Undertale: Time Paradox Triple Sans Edition) by GoldenFlowers on yt

Sans sprites- A-Sansational-battle on scratch

Clock sprites - InkDustSans on scratch

Animation- me

This take- well obviously me