Board Thread:Questions and Answers/@comment-32948273-20160129174948/@comment-5161433-20160404065804

I don't know, I think the whole 'And they all dissapeared without a trace' was never supposed to be the history of the timeline he made, but him taunting you in general. Just wanting you to feel wholly powerless. He knows you care about both humans and monsters, and would love you to feel hopeless about saving any of them.

About Photoshop Flower's barrier shattering, well, uh, he.. didn't. Or at least, nothing really implies it. In the pacifist neutral ending (Ie, the ending everyone tends to get first, the one where you kill Asgore) sans acklowedges that maybe you didn't get outside the barrier, citing it as 'where-ever you are'. In either case, if Frisk did get out I think it would have been the 6 human souls aiding yours out of the barrier. Or maybe Flowey's area where he decided to fight you was outside the barrier, roomier I guess? I 'unno.