I have an AU called Koratale. It’s about a girl named Kora, who never met her parents. Her real parents are Betty(like Betty drone Glitchtale but better) and some random guy nobody remembers. When she turns eight, she falls down into the Underground. In my AU, the Underground is like a Labyrinth. You can end up anywhere when you fall, not just the Ruins. When she falls, she ends up in Snowdin. Injured, she’s taken in by the skelebros. This is ten years after Frisk leaves without breaking the barrier and instead taking Asriel’s SOUL to pass through. Of course, Sans doesn’t trust her yet, but does eventually. 6 years later, they make it to the surface when Kora breaks the BARRIER. Toriel And Sans( Soriel is cannon) actually adopt Kora, Frisk, and Chara. Asriel gets his SOUL back, leaving poor Flowey SOULess. Frisk And Kora care for him though. In the future there will be RESETs and GENOCIDE runs. Asriel, Kora, and Fiyokou(Grillby’s daughter) will team up and travel through different AUs to build up an alliance against Chara. I’ll post the full story here if you want.