Undertale on Wii: The Glitch That Lets You Fight Sans Early - Critter Realm

August 8, 2026 · Critter Realm

Latest Retro Trends Spotlight a Classic Glitch in an Old RPG

Undertale on Wii: The Glitch That Lets You Fight Sans Early is a sequence exploit allowing immediate boss access. This trick uses specific button inputs to skip normal checks. Studies indicate speedrun communities keep this exploit relevant.

How This Glitch Manipulates Game Memory

Usually, story rules block early access to Sans. However, a rare memory override changes those rules instantly. Research shows frame-perfect actions on startup trigger the bypass reliably.

Players Skip Cutscenes to Test Limits

Rapid retry sessions help practice the input timing. Many stream this path to showcase creative sequence breaking. Results suggest practice improves execution consistency.

Simple Takeaway

Practice the steps to unlock a secret route fast.


Can I break my save file doing this?

This trick is mostly safe, though risky inputs might cause rare soft lock.

Is this allowed in official runs?

Major events often restrict it to preserve intended story flow.

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