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~ Mettaton
There you are, Frisk-darling. Feast your eyes! Dr. Alphys completed my wonderful new body. Oooh! And did you hear? The barrier's OPEN! I can't wait to see the sun... ...the greatest spotlight of all! Oh yes. I suppose I should thank you, too, darling. Before fighting you, I had... Forgotten how fun it was to perform with others. So I've been searching for HOT TALENTS to fill up my upcoming troupe. So far, Shyren's agreed to be my back-up singer. And Bl... Napstablook, here, will be my sound mixer! The three of us performing together... It really feels overdue, doesn't it? Frisk, darling. Can you help me with something? What kind of merchandise do you think humans would want to buy...? I've thought of a few ideas so far. Buttons (with my face), stickers (with my face), CDs (with my face)... Posters (with my face), T-shirts (with my face), underwear (with my face)... ...and plush dolls of TORIEL. But, you know. With my face instead of hers. So what do you think?
~ Mettaton in the True Pacifist ending.

Mettaton is a supporting protagonist of Undertale. He is a robot with a SOUL and was built by Alphys in the Hotlands.


Initial Form

Mettaton originally appears as a gray, large rectangular box with a grid of lights at the top which can change color depending on his various actions, but are usually yellow and orange. He has four round dials along the bottom of his body, a single leg with a black wheel, and two segmented robotic arms wearing white gloves.

Mettaton EX

After having the switch on his back flipped in a Neutral or True Pacifist Route, Mettaton transforms into Mettaton EX; a new body he specially requested Alphys make for him. In this humanoid form, he has black hair with a long fringe that seems to cover his right eye, pale "skin" and visible metal segments below and above his left eye.

He has a pink chest piece, a narrow metallic waist with a box contraption, and black shoulder guards above his segmented arms, which end in gloves. The chest piece has what appear to be a speaker and some knob or gauge, while the waist has two parts that seem to act as a locking mechanism that holds his "heart-shaped core," as they both lose white pixels during his "heart-to-heart" attack. His long black-clad legs end in pink high-heeled boots.

Mettaton NEO

After being confronted by the protagonist on the Genocide Route, Mettaton transforms into Mettaton NEO, which resembles Mettaton EX, but has a more combat-oriented design.

His right forearm is replaced by what appears to be a cannon, pauldrons clad his shoulders, which are shaped like legs and are longer than his arms, and he has wings on his back. The soul on his waist now points upwards in a more monster-like manner, and he has a heart shape engraved on his chest plate like Undyne the Undying. His hair on the right side is spiked out, revealing an entirely black segment of his face, with a sparkle or crosshair in place of his right eye.


Mettaton is a confident, charismatic, and charming TV host that loves drama, action, and violence. He lives for his ratings and adores performing. He supposedly strikes a pose when he does something wrong and makes time on his various shows to beat up "heel-turning villains." He shows a rather shallow appreciation for existence at times. However, despite his seemingly narcissistic personality, he deeply cares about the seemingly positive impact his show has had on the inhabitants of the Underground.


Deadly Quiz Show

During the first fight, Frisk cannot take actions, but has to partake in a dangerous quiz show. To escape, Frisk has to select the correct answers, lest their soul suffer damage as Mettaton shocks it. Doctor Alphys reveals the answers to give some aid.

Main Fight (Pacifist Route)

Phase 1

In the second fight, Frisk will have the shooter in their arsenal, allowing them to shoot projectiles from their very soul. They will need this to break the blocks that are launched when Mettaton attacks. Due to his metal body, Mettaton cannot take damage. Frisk must turn him around and flip the switch that Mettaton has on his back. When that happens, Mettaton freezes and says, "Did you... just flip... my switch!?", transforming into the Mettaton EX and leading to his second phase.

Phase 2 (Mettaton EX)

During Mettaton's second phase, Frisk has to score 10 thousand points with their various acts, or 12,000 within 14 turns.

As the Mettaton EX, Mettaton gains some new moves, like summoning disco balls. Frisk has to utilize their shooter to fire on the disco ball, and when that happens, the balls change its lights's colour. The lights deal damage if their colour is white. However, Frisk can avoid them by standing still if their colour is blue. The lights deal more damage when blue, but only if Frisk tries to move their soul through them. Mettaton can also summon Mettaton Mini-Me's to fire hearts at the soul. Frisk can avoid damage by shooting the Mini-Me's down. Mettaton will also utilize bombs and fire his soul to attack Frisk's soul.

Mettaton can also attempt to pop Frisk's soul by summoning copies of his legs, which stab onto the bullet board from one side (telegraphed by an exclamation mark on that side). Frisk can dodge this by shifting their soul to the opposite side. Mettaton can also swing his arms toward the bullet board. Frisk has to shoot the yellow bulb to force the arm to retract, allowing thrm to pass.

Later in his fight, Mettaton will cause a Pop Quiz to start. Players have to write down what they like most about Mettaton, with his reaction varying:

  • Most messages give points based on their length.
  • Compliments grant even more points.
  • Insults do nothing, and Mettaton states that Frisk is not the quiz's subject.
  • Swear words revoke points.

Mettaton will eventually drop bombs onto the stage. Frisk has to avoid damage by shooting the bomb, jumping to the side, and then jumping through the gap.

Mettaton will also launch his heart to shoot thunderbolts towards Frisk soul. Frisk can counterattack this by launching their own bullets at the murderbot entertainer's heart, which will retract after it gets shot 20 times.

Genocide Fight

As Mettaton NEO, Mettaton has a wide variety of different attacks, which include:

  • Opening fire with his arm cannon -- the shots can be avoided if Frisk moves their soul out of the way.
  • Firing a bomb into the bullet board. This bomb explodes into sound waves that must be dodged by standing still for blue waves and moving for orange ones.
  • Mettaton can slice across the Bullet Board with his sword.
  • Mettaton can fly and fire some shots downward.
  • Mettaton can slice the bullet board to pieces, so Frisk has to stay on the smallest piece to avoid taking damage, and has to avoid the slices.
  • Mettaton can also stomp on the stage with his feet.
  • Mettaton also uses bombs and blocks from his EX fight.

It is possible to finish the fight quickly by depopulating Hotland completely and striking before Mettaton can attack.



           Undertale Logo.jpg /Deltarune Logo.png Heroes

Frisk | Papyrus | Sans | Toriel | Alphys | Undyne | Mettaton | Asgore Dreemurr | Asriel Dreemurr | Monster Kid | Muffet
Kris | Susie | Ralsei | Lancer | Rouxls Kaard | Seam