Board Thread:General Discussion/@comment-27524978-20160210030742/@comment-4383275-20160727215928

Tabbender wrote: If Sans was Ness he would be literally undefeatable. Period. Ness tank meteors in Earthbound, so the knife would have just broken itself on his body, unless he got a huge nerf for some reason.

Source?

Tabbender wrote: Oh, and Sans don't fight like Ness at all. Where is the PK Flash ? Where is the PK Rockin ? Where is the matter manipulation power that took out a whole universe?

Two possibilities:

1. Inorganic objects such as cars, trash cans, and (in this case) skeletons could only use PSI due to the influence of Giygas. As I've stated before, with Giygas gone, this influence would also be absent. However, this explanation would mean that Sans can't teleport, either.

2. Sans may have traded his offensive PSI and Assist PSI such as Hypnosis and Paralysis for the attacks he has in Undertale, either due to their greater strength or to his new allegiance with W.D. Gaster, which is hinted at throughout the game.