Board Thread:General Discussion/@comment-27524978-20160210030742/@comment-43574-20160325022255

To further defend this theory I don't actually believe in, here are some responses to things I seen here and elsewhere:

Ness has EXP and LV while Sans doesn't: As said before, in Earthbound a lot of battles clearly don’t result in the enemy dying, therefore the EXP and LV in Earthbound and the ones in Undertale are different things (Experience points & Levels vs Execution points & LOVE/Level of Violence).

Ness kills things while Sans doesn't: It is not clear in Earthbound that you ever actually kill anything. Animals and (non-possessed) humans "become tame" or "regain their senses" while possessed humans and objects "go back to normal" and "stop moving" respectively. So those clearly don't die. Reanimated corpses "return to the dust of the earth", but are probably just possessed too. Ghosts "disappear"/"melt into thin air", but so does Napstablook and that don't stop him from coming back. Robots and such are "destroyed", but the ones in Earthbound are not sentient to begin with. Other things are “defeated”, but IIRC it is never implied that this means they actually die, enemies are always describes as being “K.O.”ed rather than killed. Even what happens to Giygas at the end is extremely ambiguous.

Ness can dish out a lot of damage at-once while Sans can’t: True if we talk about how Ness hurt enemies, but keep in mind how damage is calculated to player characters in Earthbound; they don’t get all the damage at once, but rather their HP starts rolling down gradually the same way damage from Sans’ attacks does. This applies even when the PC is attacked by another party member. So Ness does attack like that; as long as the target is a player character (which it is in Undertale).

Think about Charles Darwin's theory of evolution. It's not scientifically proven correct, It is.