Chara and Gaster are stuck in limbo together. This results in slight havoc as they argue with each other, but few in-game alterations. It's a good root for FanFiction, but probably wouldn't make any differences to the actual game.
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Undertale AUs (in my opinion)
RandomHi! This is a random idea I came up with, and in it, I'll be listing every undertale au I know of, and (at least) every main character within them. In my point of view, of course. If anyone wants to share their views on any of them then fine by me...
