Elvis Adika said:
And guys PLS also take note that the concept of souls in Undertale is drastically different from the ones in Dragon Ball.
I really do not remember how souls in DB were supposed to be, but Undertale souls have a similar definition to the common interpretation of what a soul is (the essence of a person, etc.)
Anyways, Sans
ca affect Janemba with his KR, but what I meant to say before is that I don't know if Sans can
truly kill him with it, because KR damages the opponent the more "sins" said opponent has done... but not the "sins" themselves inside the opponent AKA the "evil energy" that Janemba is made of... that's what enabled Gogeta to kill him, his attack "purified" that evil energy, and Sans' KR just kills the opponent, it does not destroy nor it purifies "evil energy".
If Sans just "kills" Janemba, he will just keep coming back, but if the KR
can destroy/purify the "evil energy" Janemna is made of, then he could win.