Talk:Sans (Canon)/SKeLeTrust/@comment-30406892-20191125173343/@comment-36113630-20191125215000

Actually, there is. In the game, there's a stat known as INV, (or Invulnerability, if you will) which determines the amount of time Frisk becomes invulernable after being hit. Other items like the Cloudy Glasses and Torn Notebook increase this. However, against Sans, INV is completely ignored through KR, as his attacks rapidly hit Frisk every frame, or 30 times per second in the game. Since invulnerability can be bypassed by KR, it makes sense to say that the attack can go up to 2-A because of it.