Board Thread:General Discussion/@comment-29947165-20160911231001/@comment-34437365-20180312153321

Well, let's see... going back into ancient monster history... we know nothing. But we do know he was once a scientist. So that means he's smart. Likewise, he has developed the Karmatic Retribution ability through experimentaion, and he had done so successfully. Along with being a skeleton, he already had the ability of using bones. With the Gaster Blasters however... I have a theory that the Royal Scientist before Alphys had either had some relation to, or been a mentor of Sans. In doing so, he passed on the ability of being able to use a Gaster Blaster.