Board Thread:Questions and Answers/@comment-37807741-20190111181155/@comment-37989784-20190306023333

Lazerofthefuture wrote: I believe Frisk left the underground with Asgore's SOUL. Frisk probably absorbed it when Flowey killed Asgore, right before Photoshop Flowey fight. That is my best explanation for neutral route. In genocide route, Frisk never leaves the underground, as she is presumably killed by Chara. At the end of the genocide route, right after the jumpscare starts, the laser slash animation occurs and the screen fills up with 9s, so presumably in the genocide ending, Chara gets killed. However, after starting up the game again, Chara asks for Frisk's soul to recreate the universe, so Chara and Frisk are still alive. And somehow, without a monster soul, you happen to get out, and fall back in (or it just equivalent to resetting the game?). Undertale definitely has a lot of parts that are unexplained.