maybe they thought it would be copyrighted ._.
(then how did they made the other AU's? they have a much higher chance of getting copyrighted! mew mew is one of the most unpopular characters in the whole series! so adding sans and not mew because of copyright would be pretty stupid...)
sans: ...human...shake my hand...
._.
Emma: <>v<>-uh okey . . .- -turns around and shakes his hand-
sans: *fart noises*you got tricked by the oldest pun on the book! i'm sans, sans the skeleton
Emma: ._. -cool- . . -hoi-
Toriel: *le gasp* nice to meet you, sans! i'm toriel, the caretaker of the ruins!
Marilyn: you prolly know me, huh sans?
Sans: oh, hey lady-of-wisdom! long time no see, huh?
Emma: -i has confusion-
Marilyn: oh! i didn't told you, did i? i sometimes get out of the ruins and travel!
Toriel: and you didn't told me!?
Marilyn: when you saw me, you could've just asked me!
Emma: :>
-you hear a hissing sound behind sans-
