Undertale: The Final Run

Undertale: The Final Run is an AU that takes place after an unknown (yet high) amount of Genocide Routes caused by the Eighth Fallen Human. After so many runs, one little flower got fed up and shared what he knew with other monsters. No one believed him, except for two skeleton brothers. They shared this info with the king of the Underground, who decided to prepare for the human's next arrival.
== Changes ==
Since Flowey was able to share what he remembered of the Resets and previous Routes, King Asgore decided to make preparations for when they arrive in the Underground and others who realize what the player will do will change how they see them. As such, Papyrus still believes in them, but to a lesser extent. 
Through the use of Sans's shortcuts, monsters are able to evacuate quicker and leaving less out in the open to kill, reducing the amount of determination the player has and making them easier to kill.
== Characters ==
=== Flowey ===
Flowey is the former prince of the Underground. Fed up with being trapped in a time loop caused by the human, he shares what he knows with Sans and Papyrus, who then tell Asgore what will happen. Since he is no longer sticking to his original role, he vents more of his frustration towards the player and expresses more of an interest in killing them.
=== Sans ===
Sans is the main antagonist of the AU. He was rather quick to believe Flowey due to the sever case of deja vu. He now wears a silver chest-plate that he (presumably) got from Undyne as extra defense. He shows up more than any other character in the AU. Usually it is when he taunts the player or when he is talking to someone else, such as Undyne. Sans is capable of summoning Gaster Blasters at a more fast speed and using Green Soul Magic.