Mannequin
(It's a mannequin with a dress on it.)
Narration, Chapter 2
The Mannequin (JP: マネキン) is an armor in Chapter 2 of Deltarune that can be bought from an Addison in the Cyber City for 300 D$. It can only be equipped by Kris.
The Mannequin provides the 
??? ability (different from the JusticeAxe's 
??? ability), reducing damage from Puppet/Cat attacks by 35%, which include:
- Tasque's yarn balls
- Tasque Manager's attacks
- Spamton NEO-related bullets
- Shadowguy's yarn balls in the battle against Rouxls Kaard in Chapter 3
The Mannequin cannot be bought if Noelle is no longer in the party, nor during the Weird Route. However, if the Weird Route is aborted at any point, it can be obtained through backtracking. (If Noelle is no longer in the party and the Addison is still there, the Addison will briefly mention Spamton instead of trying to sell the Mannequin.)
An Addison selling the Mannequin
There exists an unused consumable version of the Mannequin with no effect attached to it.
- The Mannequin's dress strongly resembles the dress Mettaton wears in Undertale during the UNDERTALE the Musical scene. It shares the same sleeveless gown pattern with white puffed shoulders, blue ribbon bow at waist above a blue skirt panel, powder-blue torso and skirt with white gauze or spots, and blue edges to the skirt's pleats.
- The Mannequin itself resembles Spamton. If not purchased, Kris can attempt to put the LoadedDisk inside, but the disk "squirms" and does not fit.[1]
- The Addison that sells the Mannequin advertises it as 75% off, implying that the usual price of the Mannequin is 1200 D$.
- The Mannequin, the FrayedBowtie, and the Dealmaker are the only items that reduce the damage from Puppet/Cat attacks, and also cannot be obtained during the Weird Route.
- The Mannequin shows up in Castle Town after the completion of the Chapter, but with a different outfit attached to it.
- ↑
(The LoadedDisk squirmed and won't fit!)
— Narration upon attempting to fit the LoadedDisk inside the Mannequin, Chapter 2