Board Thread:General Discussion/@comment-26006155-20190617222636/@comment-32182236-20190729163800

I didn't ask why he killed Gaster.. Or even why he did it early.

I asked why he flat-out erased his memory.

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So, back to the start-What could Gaster's experiment have been?


 * Involves the Dark World and the prophecy of the Delta Rune
 * "Shadows cutting deeper"
 * Would result in an interesting result if successful
 * If something went wrong, Gaster's very essence could be shattered across time and space
 * Could be repeated by Alphys (though it hasn't been yet)
 * Actually has a purpose (though I suppose Gaster could be a mad scientist and is just doing it for science!)

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Perhaps it wasn't the creation of Deltarune itself.. Maybe it was only the Dark World.

The doors in the Dark World are quite similar to the transport door that Sans has. Perhaps Gaster created it, with intent to later on use it in the real world? Maybe he plans on having the monsters just walk through the door, going to a Dark World (or maybe Deltarune).. walking a few kilometers.. And returning to the world of Undertale, with the Barrier behind them now.

When Frisk walks through Sans' replica of these doors, Papyrus asks if Sans has been pranking us through time and space.

Time and space. What Gaster was shattered across. The doors let you warp across time and space.

So, that fulfills this condition pretty well!


 * If something went wrong, Gaster's very essence could be shattered across time and space (Yes, it could!)

Secondly, if Sans has one of these doors, then the doors survived the vanishing of Gaster. Which means there might be more around. More for Alphys to discover, and try to use herself.. To later get the same fate.

Third, these doors would essentially allow traveling between worlds. He could go from Undertale to Deltarune this way, but why stop there? He could explore the entire multiverse this way! Perhaps this next experiment will be very, very interesting.

Sans and Papyrus both know about these doors. Sans used it, and Papyrus mentions that he hates it when Sans does it.

The warp doors naturally occur in the Dark World.. So his experiment would involve such a world. But how it connects to the prophecy.. I'm not sure if it even does.

So this theory.. Also has a flaw. I suppose I'll just have to look for a better one now.