Board Thread:General Discussion/@comment-26980570-20160320192450/@comment-4995895-20170111223741

My opinion of Gaster is that he is not the skelebros father, but another brother. This is because in some tweet (or something, I can't really remember) Toby Fox did this in character-Sans thing, and one line was 'not everyone can be as tough as my brother' Seems kind of weird if he's talking about Papyrus, right? Also, that line came right after the line 'it's rude to talk about people who are listening', which is what one of Gaster's followers says about him.

I also belive the machine he fell into was the one is Sans' basement. I think it was some sort of device to see into past resets, and Sans was helping him with it. During the accident, Gaster fell in and was erased from the timeline. It was like he never existed. Thus is why the house only has two bedrooms, and why no one remembers him. The only people who can is Sans- using the machine- and his followers, who presumably also used the machine.