Board Thread:General Discussion/@comment-27524978-20160210030742/@comment-26814804-20160331030629

Invader Jib wrote: Sure Sans could be Ness, but by that logic Toriel could be Pikachu. If we don't have a reasonable amount of evidence possibility doesnt mean much.

Actually, no, we have an extremely great amount of proof that, for instance, Toriel is not Pikachu. There is no evidence linking Undertale to Pokemon, Toriel has no electric attacks, and she is very obviously not a small yellow rat.

On the other hand, Undertale is rather clearly connected to EarthBound, Sans shares at least one ability with Ness, and they also share the same body shape and posture.

I'm not saying that Sans is Ness, I'm just saying that there is a reasonable ammount of evidence that he could be, and no proof that he is not.