Board Thread:General Discussion/@comment-4504826-20160419213858/@comment-39394247-20190508033452

Also, soulless pacifist final boss: Corrupted Chara / "The demon"

HP: 6666666 (but each hit by you is replicated by the monsters for 7x damage)

ATK: 495 on check, also true stat

DEF: 0

Your max HP is set to 140 for this.

There are the normal white attacks which do 6 damage at first, then increasing gradually to ~25 very late in the fight, and there are red attacks that do 99 damage always. Green, orange, and blue attacks appear regularly as well. No greens at first, but the amount of greens increases over time. However, so does the overall difficulty, from around Toriel or Papyrus at the start to 10x harder than Sans or Undyne the Undying at the end. The last hit, if Chara's HP is below 10%, immediately brings her down to 99 HP, and if you try to FIGHT after this, you MISS. Sparing her results in a dialogue, and makes all pacifist runs in the future non-soulless.