DIFFICULTY: 8 / 10 - S to skip intro. - Z to progress dialogue and select something. - Arrow keys to move. Fight: Attack Napstablook, press z when the moving white bar is close to the middle of the attack grid to do more damage. ( you can't kill him tho, cuz he's a ghost...) Act: Interact with Napstablook in some way. Item: Use an item to heal. Mercy: Don't attack Napstablook. - There are 2 endings in this boss fight, with up to 3 phases. - This takes place after you kill Sans in a Genocide Route in Undertale.
also this is pretty lazy so don't roast you can die on undyne attacks