Finally, someone made a request! Thanks!

Let's see here-*searching through notebook* Aha! Swaptale!

Swaptale is basically one of the reasons I exist due to the fact it has two timelines with polar opposite routes. Genocide and Pacifist.

I've observed this timeline before by accident because I was still very new to the whole Multiverse, I accidentally ended up there as the sixth time I teleported without knowledge of anything. But back to the topic at hand.

If you didn't know Swaptale has two timelines at the same time- like I said in the beginning- In this AU everything is normal except Frisk and Chara switched timelines as they were about to end it....

The Chara of that AU was switched into the pacifist timeline while Frisk is in the genocide run with that timeline's Sans as the lone survivor and companion to them.

If you want more information I might go visit that AU for old times sake and collect more data on the outcome happening there.

Thank you and I hope I helped just a little bit...