Talk:Asriel Dreemurr/In Battle/@comment-28184793-20160506132029/@comment-27583051-20160716070822

Sans doesn't even fight you in neutral endings where you killed Pap, he still guilts you though, but he knows you'll just reset so what's the point in fighting you, he'd just end up dead if you manages to hit him. However, when he *does* fight you,  it's because you're a danger to the timeline. He doesn't know how, he doesn't know why, all he know is that "suddenly, everything ends". If you go into the next room in the timeline where he fights you, only hacking can salvage any "future" timeline.

As a lost soul, he shows that he just doesn't care. That is why he didn't attack properly here.