Intro {{{intro}}}
Type {{{type}}}
Signs of nearing Undyne's voice
Origin Undertale
Map(s) Special boss
Theme song Run!
Partners {{{partners}}}
Stunnable? {{{stunnable?}}}

Undyne is a boss on Slender Fortress, has two Content Downloaders.


Undyne is a fish-like humanoid undine monster. She has blue scales and a long bright red ponytail. She appears to not have a nose, she has red and blue fins on the side of her head, and a pair of sharp yellow protruding teeth. She wears bright red eye shadow and has an eyepatch on her left eye. Her eyes have vertical black pupils and a yellow sclera.

In Slender FortressEdit