Undyne the Undying is one of the most challenging bosses in Undertale, particularly during a Genocide run. While the basic mechanics of the fight are similar to the Pacifist version, everything is intensified, making this an extremely fast-paced and difficult encounter. This battle is known for its combination of rhythm-game-style segments and chaotic spear-dodging phases. Here’s a breakdown of how to approach the fight effectively.
Preparation for How to Beat Undyne the Undying
Healing Items: Use Cinnamon Buns, Sea Tea (for speed boosts), or Bicycles. Save the Butterscotch-Cinnamon Pie for later battles.
Equipment: Equip the Cloudy Glasses and Torn Notebook for extended invincibility after being hit.
Battle Tips
DDR-Style Attacks: Memorize patterns like the Misleading Intro and Left-Right Tango. For random arrow attacks, focus on the red arrows and block quickly.
Spear Attacks: Always keep moving during spear phases, especially when they spawn in circles or from all directions. For upward spear attacks, stick to the top of the field and shift left or right as needed.
Yellow Arrows: Ignore them and focus on the main arrow patterns.
Rotating Spears: Move side to side and adjust based on the gaps. Stay calm and time your movements.
General Strategy
- Memorize attack patterns; they’re mostly fixed.
- Conserve healing items for difficult phases like Rotating Spears or Super Spears of Doom.
- Stay patient—it may take several attempts to master.
Order of Attacks
The battle follows a set order of attacks, with sequences repeating as the fight progresses. Survive long enough, and you’ll eventually overcome her.
