sans fight

if you are doing a genocide run, in the end you will be standing face to face in the judgement hall with the last enemy Sans. Sans may have been peaceful and lazy through the other runs, but now he will stop at nothing to stop you and your genocidal ways. Even though he has only 1 hp, he is the hardest boss in the game due to his ability to dodge. The only tip to beating him is getting the best items and memorize his attacks.