Board Thread:General Discussion/@comment-26980570-20160320192450/@comment-26980570-20160322183346

The gaster have been indeed canon'ised by Toby since you can encounter his followers and his room at rand moments.

Now coming to your theory, It has solid grounds because unlike Alphys I think Gaster would be much cautious of his experiment and wouldn't make a mistake like imbuing only 1 trait hence preventing his invention to go haywire but It wouldn't explain as to why sans helps Alphys..Why would sans pursue determination??

On a side Note HOLY F*CKING SH**. I think you just opened up another theory, Could it be that after her intial mistake (Including Amalmagates and Flowey), Alphys seeked out sans's blueprint for her next experiment....Undyne. After understanding that monsters can withstand a certain amount of a human soul's trait (Due to sans almost perfect reanimation) She imbued Undyne with vigorous Determination and Bravery...It would explain her death animation and also reanimationand as to why this reanimation only happens During her dying (NOte: It would take huge amounts of guts to go against someone who just made half of the monsters go extinct and doesn't happen in a neutral death of Undyne due to her being caught off guard!!!!!