Board Thread:General Discussion/@comment-34634998-20180209044354/@comment-27136653-20180211054855

"After doing so, Gaster tried to "fix himself""

His presence ended with that "accident", and there is no mention of him ever doing anything afterwards. If you however mean that his very first take on this experiment resulted in him being transported to a different universe, then all I can say about that is: I don't know. For all we know, he may have jumped timelines like crazy, until finally shattering across time and space due to a single failure, but I just don't know. We don't know.

One popular theory is that he was the first user of the save points, and that he may have even created them himself. That way, he would be able to jump across timelines, until an accident happened. Also, I don't think there is any sort of proof that he created Sans and Papyrus by shattering himself across time and space.

Lastly, 1) Asriel's line is unrelated to Gaster, as the memory loss involved there is related to the resets 2) I'm not sure why would Gaster have to travel across multiple timelines to escape a single mistake, 3) even if, I don't understand why would THAT be the cause of his demise, and 4) why would he make sure to get forgotten on purpose? What benefit does that carry? And lastly, 5) he was ever forgotten, nothing in the game ever says so. Others were forgotten, for example, the goner kid, or Sans and Papyrus. But Gaster? No. In fact, there's PROOF in the game that people remember him! Check the Gaster followers' dialogues again. One of them implies Asgore still remembers Gaster.