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Moldessa (/moʊlˈdɛsə/) is a monster in Undertale, appearing throughout the Ruins only on Hard Mode. It is a stronger counterpart of Moldsmal, similar to Moldbygg.



Its body presents something like a flipped lightbulb, with a strange, flower-like creation at the top. It also has the pair of elastic, identical protrusions. Its face spins in a circle and has many different shapes, which change depending on which action is taken.

In Battle

Appears With


  • Moldessa fires bullets that travel straight down and explode into 8 smaller pellets.
  • Moldessa fires bullets that travel in a zigzag formation and do not explode.


  • Moldessas can be spared by fixing their faces.
  • If the protagonist lies down, all monsters other than the ACTed on Moldessa will become spareable.


  • Shh...
  • Hsh...
  • Krr...
  • (slime sounds)

Flavor Text

  • Can't decide on a face. Can't see friend from foe. [Check]
  • You tripped over some Moldessas. [Encounter with another Moldessa]
  • A line of Moldessas block the path. [Encounter with two other Moldessas]
  • Moldessa tries to make its face look like a movie-star's, but it shifts apart. [Neutral]
  • Moldessa hides behind its ears. ...arms? [Neutral]
  • Smells like twelve-week-old gummy bears. [Neutral]
  • Moldessa's face looks... happy? [Meeting spare condition]
  • You encourage Moldessa to try a new look. Its face shifts... [Switch]
  • You adjust Moldessa's face. It seems to be happy with its new look. [Fix]
  • You lie down and rest. Moldessa tucks you in with a blanket of moss. [Lie Down]
  • While you were sleeping, the other monsters get bored. [Lie Down]
  • Moldessa's face falls apart. [Low HP]



  • Moldessa's name comes in part from the word mold, which is also in Moldsmal and Moldbygg's name.
  • Moldessa's ears resemble the Dreemurr royal family's.