Crossoverse Timeline

Unknown Year Monsters and Humans declare war on each other, and the Monsters get sealed away into the underground, which is only acessible to humans by falling down Mount Ebott.

1992:

June 9: Daniel is born.

June 10: David is born.

Before 1995:

Unknown Date: Sans is created.

1995:

Unknown Date 1: Papyrus is created.

Unknown Date 2: Chara and Asriel fuse and get killed by a human society and Asgore kills 6 humans over the course of

1999 September 22: Monika is born.

Early 2000s

Unknown Date: Meanwhile, in an alternate universe, Asriel is living a happy life at college, and his adoptive brother Kris goes on an adventure with the school bully Susie.

2015 September 15: 20 years after Asriel and Chara’: deaths, a human child named Frisk falls into The Underground and either saves or KILLS everyone. (We'll go with saves because it's better.)

November 30: After a ban on Joke Profiles and the deletions and his temporary ban, soon to be Bureaucrat of VS Battles Ryukama creates Joke Battles to let people create whatever Joke Profile they want.