Undefeated

*So....
*Guess that's it huh
*Just...don't say I didn't warn you
*Welp, I'm going to Grillby's.
*Papyrus...do you want anything....?
What if the ending to the Genocide Run of Undertale wasn't really the end? What if Sans had one more trick up his sleeve, and was just waiting until the right time to use it? What will Chara's and Frisk's reaction be, and will Chara be able to defeat him? It's Fight or Mercy, and neither one seem to be any use in this battle....

This will be from Chara's point of view most of the time, and the font for both Chara and Frisk will be different so you can tell them apart.
*MAY CONTAIN SPOILERS FOR UNDERTALE SO DON"T READ IF YOU HAVEN'T PLAYED THE GAME*