Board Thread:General Discussion/@comment-26006155-20190617222636/@comment-32182236-20190621133627

In that case, why did they take it off later on?

Alpha Frisk/Sans clearly still has memory of what happened, because he knows about searching for the anomaly based on his Genocide Speech, he apparently can retrace his original steps, and he still has his disguise, even after going back in time.

In order for him to predict that Frisk would come as a human based on living that life, he must have came as a human as well at one point.

Why would he do this? Why take off the disguise?

It also means that if he did lose his memory, it was restored.. Meaning that by the time Frisk becomes Sans for the second time (far after the events of Undertale), they would remember that they are Ness.

With the Barrier broken, Ness would want to return home.

...But that's not what happens. Frisk remains in the world of Undertale. Flowey tells "Chara" to "let Frisk live their life". They're staying.

So..

1-If Frisk passed the test, why didn't Sans bring Frisk back home?

2a-How could Sans predict that Frisk would be coming, undisguised, if this never happened in the Alpha Timeline?

2b-If it did happen in the Alpha Timeline, just why?

3-If Beta Frisk's memories are lost forever, why didn't the same thing happen to Alpha Frisk?