Thread:Tabbender/@comment-5935499-20180201055704

Chara's game destruction feat causes the very folder that contains all of Undertale's save data to delete itself.



This includes File0, which contains the information of your current route (in this case, Genocide), and File9, which contains the information of previous routes.

Not only that, but normally, when you delete this folder, every trace of the game remembering that you played it is erased. Chara recreating the world actually is like this; everyone forgets everything that happened in previous timelines.

Chara may not be 2-B by your standards, but going by this they should be solid 2-C. 