Yellow eventually approached a cave. She had a feeling that she was at the end of Waterfall.
"Pikachu pi!" Chuchu shouted, pointing up.
Looking up, Yellow saw Undyne standing on top of the cave.
"How did she get there so quickly?" Yellow wondered aloud.
Undyne spoke "Seven. Seven human souls , and King Asgore will become a god."
"Didn't she already say this?" Yellow thought, as Undyne continued.
"Six. That's how many we've collected thus far. Understand? Through your seventh human soul, this world will be transformed. First, however, As is customary for those who make it this far... I shall tell you the tragic tale of our people."
While Yellow wanted to sit down, she had to keep standing, for Undyne could attack at any moment.
"It all started, long ago." Undyne began. "...No, you know what? SCREW IT! WHY SHOULD I TELL YOU THAT STORY, WHEN YOU'RE ABOUT TO DIE?!
Undyne let out a battle cry, then took off her helmet, revealing a blue, fish-like face, with an eye patch over one of her eyes.
"YOU!" Undyne exclaimed. "You're standing in the way of everyone's hopes and dreams! Alphys's history books made me think humans were cool... With their giant robots and flowery swordsmen. But you?! You're just a coward! Hiding behind a kid so you could run away from me again! And let's not forget about your wimpy goody-two-shoes schtick! "Oooh! I'm making such a difference by hugging random strangers!" You know what would be more valuable to everyone? If you were dead! That's right, human! Your continued existence is a crime! Your life is all that stands between us and our freedom! Right now, I can feel everyone's hearts pouting together! Everyone's been waiting their whole lives for this moment! But we're not nervous at all. But everyone puts their hearts together, They can't lose! Now, human! Let's end this, right here, right now. I'll show you how determined monsters can be! HERE I COME!"
Undyne summoned a spear, and lunged down towards Yellow, beginning a fight.