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I'M NOT GOING TO DESTROY YOU WITHOUT A LIVE TELEVISION AUDIENCE!!

Mettaton

Mettaton is a robot with a SOUL and was built by Alphys. Initially poised as an entertainment robot turned human killing robot, Mettaton is later revealed to have only acted as such so that Alphys could rescue the protagonist, feel important and become closer to them. Mettaton is the sole television star of the Underground. He serves as the final boss of the CORE and a major character in Undertale.

Profile

Appearance

Initial Form

Mettaton overworld pointing up

Mettaton making a "number 1" symbol

Mettaton originally appears as a gray, largely rectangular box with a 4x5 grid of rectangular lights at the top, similar to the mechanism in Snowdin Forest used for Papyrus's Tile Puzzle. The grid of lights can change colors between red, yellow, green, and blue, and Mettaton uses these color changes in place of facial expressions. He has four dials along the bottom of his body, and the bottom, he has a single leg which ends in a wheel. He has two segmented robotic arms which end in white gloves.

Mettaton EX

After having the switch on his back flipped in the 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 pads 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, however Mettaton NEO can be killed by a single attack and has no attacks of his own.

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 points upwards in a more monster-like manner, and he has a heart shape engraved on his chest plate like Undyne the Undying, also mimicking the Delta Rune in the same ways. 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.

Personality

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. He has a strong craving for attention and seems very egotistical, shown when he boasts about the beauty of his true form. However, despite his seemingly self-centered personality, he deeply cares about the seemingly positive impact his show has had on the inhabitants of the Underground. He has also shown soft spots for several characters, such as Alphys and Napstablook. He also appears to be among the fewer characters in the Underground that has no hate or prejudice against humans despite knowing about the monsters' history with them, since his initial attempts to kill the protagonist were just him playing along with Alphys's plan, and he outright tells the protagonist he has no desire to hurt humans and is far more interested in simply entertaining. While he did attempt to kill the protagonist, it was to prevent Asgore from taking their SOUL and be seen as a hero/savior to humankind, further emphasizing his lack of prejudice. On the flip side, he has also been noted to be a very demanding boss who is very unpleasant to work for, especially according to Burgerpants, who initially considered working for him a dream, but has since grown to strongly despise him.

Main Story

Neutral Route

When meeting Alphys in the Lab, the protagonist is warned about an old machine that she had created, Mettaton. Alphys describes it as a robot that was made to be a TV star but recently had anti-human combat features added as a way of making him more useful.

Mettaton overworld arm up

Mettaton with his arm up and displaying the letter M

Immediately after this warning, Mettaton bursts through the wall (noted to be only a few feet wide, indicating that he was lying in wait for the protagonist for some time) and forces the protagonist into a deadly quiz show.

Quiz Show

Mettaton overworld laughing

Mettaton "laughing." Note that his microphone is missing

Mettaton asks a series of multiple-choice questions that must be answered correctly within several seconds (the number says 30, but goes down approximately two numbers per second, giving only 15 seconds to answer). If incorrectly answered or not answered within the time limit, Mettaton fires an unavoidable electric shock that halves the protagonist's health. In spite of this, it is impossible to die during this quiz show. Alphys on the top right gives answers via hand motion; realizing this, Mettaton chooses to humiliate her by quizzing the protagonist on the identity of her unrequited love interest. Regardless of the protagonist's choice, Mettaton ultimately departs, concluding that the quiz show has lost all dramatic tension.

Cooking with a Killer Robot

As the protagonist journeys through Hotland, Mettaton entraps them in deadly pastiches of various media genres. First, he forces the protagonist to become his assistant in a cooking show where Mettaton is preparing a cake with a human SOUL as the main ingredient, and he attempts to kill the protagonist with a chainsaw to attain it. Alphys calls in as an interruption and suggests that some viewers may be vegan in an attempt to stop Mettaton from harvesting the protagonist's SOUL as an ingredient, so instead, Mettaton points towards a human SOUL-flavored substitute on top of a faraway cupboard.

Mettaton overworld clapping

Mettaton applauding the protagonist

However, the cupboard begins to shoot up from the ground rapidly, forcing the protagonist to use the jetpack feature previously installed on their phone by Alphys. They fly to the top and retrieve the substitute within a time limit of 1 minute set by Mettaton while he drops eggs, flour, and milk, all of which slow the protagonist's ascent.

The milk slows the protagonist down a whole lot.

  • If the protagonist reaches the substitute within the time limit, Mettaton states, like all cooking shows, he had already baked the cake ahead of time before leaving.
  • If they fail, Mettaton suddenly claims the show is on commercial break and refuses to kill them as there are currently no viewers.

Either way, he comments that he was foiled yet again by Alphys. Upon interacting with the substitute after this encounter, it shows the can was stuck to the table, so the protagonist would not have been able to get the substitute given the chance.

Cooking Show Quotes
Pre-Cooking Show
  • [Narrator] Ring...
  • [Alphys] H-hey, it's kind of dark in there, isn't it?
  • [Alphys] Don't worry!
  • [Alphys] I'll hack into the light system and brighten it up!
Cooking Show
  • [Alphys] Oh no.
  • OHHHH YES!!!
  • WELCOME, BEAUTIES, TO THE UNDERGROUND'S PREMIER COOKING SHOW!!!
  • PRE-HEAT YOUR OVENS, BECAUSE WE'VE GOT A VERY SPECIAL RECIPE FOR YOU TODAY!
  • WE'RE GOING TO BE MAKING...
  • A CAKE!
  • MY LOVELY ASSISTANT HERE WILL GATHER THE INGREDIENTS.
  • EVERYONE GIVE THEM A BIG HAND!!!
  • WE'LL NEED SUGAR, MILK, AND EGGS.
  • GO FOR IT, SWEETHEART!
  • Capital wenisberry. [Interact with Mettaton; unused]
  • MILK, SUGAR, AND EGGS! YOU SHOULD BE ABLE TO FIND THEM ON THE BACK COUNTER! [Interact with Mettaton]
  • [Check the sink]
    • THIS ISN'T A SHOW ABOUT WASHING YOUR HANDS, DARLING.
    • THAT'S ON WEDNESDAYS!
  • [Check the fridge]
    • MILK? EGGS? IN THE FRIDGE?
    • NO WAY, DARLING! THEY'D GET COLD!!!
  • [Check the microwave]
    • MTT-BRAND MICROWAVE! ORIGIN OF THE MTT CHALLENGE!
    • PUT YOUR FOOD IN AND SET THE MICROWAVE ON HIGH FOR FIVE MINUTES...
    • IF YOU CAN STILL RECOGNIZE YOUR MEAL, WE'LL DOUBLE YOUR MONEY BACK!!!
  • [Check the stove]
    • OH YES! MTT-BRAND OVENS CAN REACH TEMPERATURES UP TO NINE-THOUSAND DEGREES!
    • ROASTING! TOASTING! BURNING! CHARRING! YOU'RE EXCITED, AREN'T YOU, DARLING? (TM)
  • GREAT JOB! JUST PUT THEM IN THE MIDDLE OF THIS COUNTER! [Interact with Mettaton after getting the ingredients]
  • [After ingredients are gathered]
    • PERFECT! GREAT JOB, BEAUTIFUL!
    • WE'VE GOT ALL OF THE INGREDIENTS WE NEED TO BAKE THE CAKE!
    • MILK... SUGAR... EGGS...
    • ... OH MY! WAIT A MAGNIFICENT MOMENT! HOW COULD I FORGET!!!
    • WE'RE MISSING THE MOST IMPORTANT INGREDIENT!
    • A HUMAN SOUL!!!!
    • [Narrator] Ring...
    • HELLO...? I'M KIND OF IN THE MIDDLE OF SOMETHING HERE.
    • [Alphys] W-wait a second!!!
    • [Alphys] Couldn't you make a...
    • [Alphys] Couldn't you use a...
    • [Alphys] Couldn't you make a substitution in the recipe?!
    • ... A SUBSTITUTION? YOU MEAN, USE A DIFFERENT, NON-HUMAN INGREDIENT?
    • ... WHY?
    • [Alphys] Uhh, what if someone's...
    • [Alphys] ...
    • [Alphys] Vegan?
    • ... VEGAN.
    • [Alphys] Uh well I mean
    • THAT'S A BRILLIANT IDEA, ALPHYS!!
    • ACTUALLY, I HAPPEN TO HAVE AN OPTION RIGHT HERE!!!
    • MTT-BRAND ALWAYS-CONVENIENT HUMAN-SOUL-FLAVOR-SUBSTITUTE!
    • A CAN OF WHICH... IS JUST OVER ON THAT COUNTER!!!
    • WELL, DARLING? WHY DON'T YOU GO GET IT?
  • [Interact with Mettaton]
    • WHAT'S THE MATTER? NOT A CAN FAN? THAT'S TOO BAD!
    • MTT-BRAND USES ONLY THE FRESHEST ARTIFICIAL INGREDIENTS AND CHEMICALS!
  • [Check the fridge]
    • [Narrator] Ring...
    • [Alphys] Um, is it really a good idea to be getting a snack?
    • [Alphys] Well, I guess I really shouldn't judge you...
    • [Alphys] After all, I'm the one eating potato chips in my PJs!
    • [Alphys] Uhhh, I mean... H-hey, go over to the right!
  • [Check the fridge #2+]
    • [Narrator] Ring...
    • [Alphys] H-hey! Head over to the right!
  • [Check the microwave]
    • STILL FIDDLING WITH THAT MICROWAVE, EH, DARLING?
    • CAN'T BLAME YOU FOR BEING TOTALLY ENAMORED WITH AN ELECTRONIC BOX.
  • BY THE WAY, OUR SHOW RUNS ON A STRICT SCHEDULE.
  • IF YOU CAN'T GET THE CAN IN THE NEXT ONE MINUTE...
  • WE'LL JUST HAVE TO GO BACK TO THE ORIGINAL PLAN!!!
  • SO... BETTER START CLIMBING, BEAUTIFUL!!!
  • [Narrator] Ring...
  • [Alphys] Oh no!!! There's not enough time to climb up!
  • [Alphys] ...
  • [Alphys] F-f-fortunately, I might have a plan!
  • [Alphys] When I was upgrading your phone, I added a few... features.
  • [Alphys] You see that huge button that says... "JETPACK"?
  • [Alphys] Watch this!
  • [Alphys] There!
  • [Alphys] You should have just enough fuel to reach the top!
  • [Alphys] Now, get up there!!!
Post-Cooking Show
  • [Protagonist reached the can]
    • MY MY.
    • IT SEEMS YOU'VE BESTED ME.
    • BUT ONLY BECAUSE YOU HAD THE HELP OF THE BRILLIANT DOCTOR ALPHYS!
    • OH, I LOATHE TO THINK OF WHAT WOULD HAVE HAPPENED TO YOU WITHOUT HER!!!
    • WELL, TOODLES!!
    • OH YES! ABOUT THE SUBSTITUTION...
    • HAVEN'T YOU EVER SEEN A COOKING SHOW BEFORE?
    • I ALREADY BAKED THE CAKE AHEAD OF TIME!!!!! SO FORGET IT!!!
    • [Alphys] Ring...
    • [Alphys] Wow! We... we did it!!
    • [Alphys] We... we really did it!!!
    • [Alphys] Great job out there, team!
    • [Alphys] W-well, uh, anyway, let's keep heading forward!!!
    • [Narrator] Click...
  • [Protagonist did not reach the can]
    • [Narrator] Ring...
    • [Alphys] Wh-what!? Wh-why aren't you m-m-moving?
    • [Alphys] N-no...! I must not have added enough fuel!
    • [Alphys] D-darnit... I'm sorry...
    • [Alphys] Even when it's something like this, I...
    • [Alphys] I still...! I still...
    • OH NO, WOULD YOU LOOK AT THAT!
    • [Alphys] What?
    • I FORGOT! RIGHT ABOUT NOW IS WHEN WE HAVE OUR COMMERCIAL BREAK!
    • [Alphys] Wh... What are you...
    • UNFORTUNATELY, THAT MEANS NO ONE IS WATCHING THIS RIGHT NOW.
    • I'M NOT GOING TO DESTROY YOU WITHOUT A LIVE TELEVISION AUDIENCE!!
    • LOOKS LIKE YOU'VE FOILED ME ONCE AGAIN, THANKS TO THE BRILLIANT DR. ALPHYS!!!
    • UNTIL NEXT TIME, BEAUTIFUL!
    • TOODLES!
    • [Narrator] Ring...
    • [Alphys] ...
    • [Alphys] U-um... I guess we... ... did it?
    • [Alphys] W-well, uh, anyway, let's keep heading forward!!!
    • [Narrator] Click...

MTT News

Secondly comes a breaking news segment, in which Mettaton asks the protagonist to report on one of the several items within a room ( a dog, a video game, a movie script, a basketball, a present, and a seemingly normal glass of water), which all turn out to be bombs hidden by Mettaton. Mettaton then scatters the bombs around the area, and the protagonist is forced to find and defuse all of them with one of Alphys's phone installments before a larger bomb in the center of the room goes off.

  • If the protagonist defuses all the bombs in time, Mettaton declares that the bomb now explodes in two seconds instead of two minutes.
  • If the protagonist has not disabled all the bombs until ten seconds before the big bomb explodes, the time slows substantially.
  • If the protagonist has not disabled all the bombs before time expires, Mettaton states that the protagonist failed to disarm them all within three minutes. However, even factoring in the slower passage of time through the last ten "seconds" of play, the total amount of time given to defuse the bombs still amounts to under three minutes.

Regardless of whether the bombs were defused or not, Alphys hacks the big bomb and disables it.

Bomb Defusal Quotes
Pre-Bomb Defusal
  • [Narrator] Ring...
  • [Alphys] Okay, I'm back!
  • [Alphys] A-another dark room, huh?
  • [Alphys] Don't worry!
  • [Alphys] M-my hacking skills have got things covered!
  • [Alphys] Are you serious?
  • OHHHHHH YESSS!!!
  • GOOD EVENING, BEAUTIES AND GENTLEBEAUTIES!
  • THIS IS METTATON, REPORTING LIVE FROM MTT NEWS!
  • AN INTERESTING SITUATION HAS ARISEN IN EASTERN HOTLAND!
  • FORTUNATELY, OUR CORRESPONDENT IS OUT THERE, REPORTING LIVE!
  • BRAVE CORRESPONDENT! PLEASE FIND SOMETHING NEWSWORTHY TO REPORT!
  • OUR TEN WONDERFUL VIEWERS ARE WAITING FOR YOU!!
  • [Check the basketball]
    • BASKETBALL'S A BLAST, ISN'T IT, DARLING?
    • TOO BAD YOU CAN'T PLAY WITH THESE BALLS.
    • THEY'RE MTT-BRAND FASHION BASKETBALLS. FOR WEARING, NOT PLAYING.
    • YOU CAN'T GET RICH AND FAMOUS LIKE MOI WITHOUT BEAUTIFYING A FEW ORBS.
    • (REPORT THIS ONE?)
  • [Check the Basketball #2+]
    • IT SEEMS OUR REPORTER IS DRAWN TO SPORTS LIKE MOTHS TO A FLAMING BASKETBALL HOOP.
    • (REPORT THIS ONE?)
    • [Report]
      • ATTENTION, VIEWERS! OUR CORRESPONDENT HAS FOUND... A BASKETBALL!
      • AH. BASKETBALLS.
      • CIRCLES OF FUN. ORBS OF JOY. SPHERES OF AMUSEMENT.
      • BUT YOU SHOULDN'T PLAY WITH THIS ONE. IT'S AN MTT-BRAND FASHIONBALL.
      • PROPER MAINTENANCE IS REQUIRED TO KEEP IT LOOKING GOOD.
      • AS YOU CAN SEE, EVEN EXPOSURE TO HUMAN BODY HEAT CAUSES THE PAINT TO SLOUGH OFF.
      • ...
      • WAIT A SECOND.
      • THAT'S NOT A BASKETBALL.
      • THAT'S A BOMB!!!
      • OH NO!!! THIS SPORT REVIEW...
      • IS TURNING INTO A SHORT REVIEW!
      • BECAUSE IT'LL BE OVER. AFTER YOU BLOW UP.
      • BUT DON'T GET TOO EXCITED!
      • YOU HAVEN'T EVEN SEEN THE REST OF THE ROOM YET!
  • [Check the Dog]
    • WHAT A SENSATIONAL OPPORTUNITY FOR A STORY!
    • I CAN SEE THE HEADLINE NOW:
    • "A DOG EXISTS SOMEWHERE."
    • FRANKLY, I'M BLOWN AWAY.
    • (REPORT THIS ONE?)
  • [Check the Dog #2+]
    • THIS DOG... STILL EXISTS!
    • THIS STORY... JUST KEEPS GETTING BETTER AND BETTER!
    • (REPORT THIS ONE?)
    • [Report]
      • ATTENTION, VIEWERS! OUR CORRESPONDENT HAS FOUND... A DOG!
      • (CUE AUDIENCE AWWS)
      • THAT'S RIGHT, FOLKS! IT'S THE FEEL-GOOD STORY OF THE YEAR!
      • LOOK AT ITS LITTLE EARS, TINY PAWS, FLUFFY TAIL...
      • ...
      • WAIT A SECOND.
      • THAT'S NOT A TAIL!
      • THAT'S...
      • A FUSE!!!
      • THAT'S RIGHT... THAT DOG...
      • IS A BOMB!!!
      • BUT DON'T PANIC!
      • YOU HAVEN'T EVEN SEEN THE REST OF THE ROOM YET!!!
  • [Check Present]
    • OH MY! IT'S A PRESENT! AND IT'S ADDRESSED TO YOU, DARLING!
    • AREN'T YOU JUST BURSTING WITH EXCITEMENT?
    • WHAT COULD BE INSIDE? WELL, NO TIME LIKE THE "PRESENT" TO FIND OUT!
    • (REPORT THIS ONE?)
  • [Check Present #2+]
    • READY FOR YOUR... PRESENTATION?
    • (... LET'S CUT THAT ONE IN POST.)
    • (REPORT THIS ONE?)
    • [Report]
      • ATTENTION, VIEWERS! OUR CORRESPONDENT HAS FOUND... A PRESENT!
      • AND IT'S TIME FOR THE UNBOXING VIDEO!!!
      • LET'S FIND OUT WHAT'S INSIDE!!
      • THAT ROUND, BLACK SHAPE... COULD IT BE???
      • LOOKS LIKE CHRISTMAS CAME EARLY THIS YEAR.
      • IF SANTA GAVE PEOPLE BOMBS INSTEAD OF PRESENTS!!
      • REALLY THOUGH. A BOMB. WHAT A THOUGHTFUL GIFT.
      • THEY EVEN DECIDED TO LIGHT IT FOR YOU!
      • BUT DON'T GET TOO EXCITED!
      • YOU HAVEN'T EVEN SEEN THE REST OF THE ROOM YET!
  • [Check Video Game]
    • OOH LA LA! THIS VIDEO GAME YOU FOUND... IS DYNAMITE!!!
    • THOUGH I DON'T MAKE AN APPEARANCE IN IT UNTIL THREE-FOURTHS IN.
    • BUT I LIKE THAT.
    • APPEARING FROM THE HEAVENS LIKE MANNA, SLAKING THE AUDIENCE'S HUNGER FOR GORGEOUS ROBOTS...
    • OOH! THAT'S METTATON!
    • (REPORT THIS ONE?)
  • [Check Video Game #2]
    • AH, YOU UNDERSTAND.
    • THIS IS A GAME WHERE YOU SHOULD CHECK EVERYTHING TWICE.
    • (REPORT THIS ONE?)
    • [Report]
      • ATTENTION, VIEWERS! OUR CORRESPONDENT HAS FOUND... A VIDEO GAME!
      • THIS ACTION-PACKED GAME IS GUARANTEED TO BLOW YOU AWAY!
      • STRANGE ENEMIES! STRANGE ALLIES! ATTRACTIVE ROBOTS!
      • FEATURING UP TO SIX ARBITRARY DIALOGUE CHOICES AT ONCE!
      • CORRESPONDENT! LET'S LOOK INSIDE THE CASE!
      • ... THOSE RED CYLINDERS WITH BURNING FUSES...
      • OH NO! THIS GAME LITERALLY IS DYNAMITE!
      • I GUESS THEY WERE RIGHT ALL ALONG!!!
      • VIDEO-GAMES DO CAUSE VIOLENCE!
      • OR AT LEAST THIS ONE'S ABOUT TO.
      • BUT DON'T GET TOO EXCITED!
      • YOU HAVEN'T EVEN SEEN THE REST OF THE ROOM YET!
  • [Check Movie Script]
    • OH NO!!! THAT MOVIE SCRIPT!!! HOW'D??? THAT GET THERE???
    • IT'S A SUPER-JUICY SNEAK PREVIEW OF MY LATEST GUARANTEED-NOT-TO-BOMB FILM:
    • METTATON THE MOVIE XXVIII... STARRING METTATON!
    • I'VE HEARD THAT LIKE THE OTHER FILMS...
    • IT CONSISTS MOSTLY OF A SINGLE FOUR-HOUR SHOT OF ROSE PETALS SHOWERING ON MY RECLINING BODY.
    • OOH!!! BUT THAT'S!!! NOT CONFIRMED!!
    • YOU WOULDN'T (COUGH) SPOIL MY MOVIE FOR EVERYONE WITH A PROMOTIONAL STORY, WOULD YOU?
    • (REPORT THIS ONE?)
    • PHEW!!! THAT WAS CLOSE!! YOU ALMOST GAVE ME A BUNCH OF FREE ADVERTISEMENT!! [Look More]
  • [Check Movie Script #2+]
    • OH! YOU'RE BACK!
    • THAT'S RIGHT, FOLKS! IT SEEMS NO ONE CAN RESIST THE ALLURE OF MY NEW FILM!
    • (REPORT THIS ONE?)
    • [Report]
      • ATTENTION, VIEWERS! OUR CORRESPONDENT HAS FOUND... A MOVIE SCRIPT!
      • OH MY! AND IT LOOKS LIKE IT'S FOR MY LATEST FILM!
      • LET'S NOT KEEP THEM WAITING! LET'S OPEN IT UP AND GET THE SCOOP!
      • ... OH??? WHAT'S THAT INSIDE THE SCRIPT?
      • THAT TICKING SOUND... THAT LIT FUSE...
      • OH MY!!! LOOKS LIKE I WAS WRONG ABOUT THE MOVIE!
      • WE DEFINITELY HAVE A BOX OFFICE BOMB ON OUR HANDS!
      • AND IT'S ABOUT TO BLAST YOU TO BITS!
      • BUT DON'T GET TOO EXCITED!
      • YOU HAVEN'T EVEN SEEN THE REST OF THE ROOM YET!
  • [Check Glass of Water]
    • OH MY!!!!
    • ... IT'S A COMPLETELY NONDESCRIPT GLASS OF WATER.
    • BUT ANYTHING CAN MAKE A GREAT STORY WITH ENOUGH SPIN!
    • (REPORT THIS ONE?)
  • [Check Glass of Water #2+]
    • I'M HONORED TO BE IN THE PRESENCE OF SUCH A HUGE LUKEWARM WATER FAN, FOLKS!
    • (REPORT THIS ONE?)
    • [Report]
      • ATTENTION, VIEWERS! OUR CORRESPONDENT HAS FOUND... A GLASS OF WATER!
      • BUT WHAT'S ASTONISHING ABOUT THIS GLASS OF WATER...
      • IS HOW UNINTERESTING IT IS!
      • LIKE ALL GLASSES OF WATER, IT'S COMPRISED OF WATER, GLASS, NITROGLYCERIN...
      • ...
      • WAIT A SECOND.
      • THAT'S NOT A GLASS OF WATER!!!
      • THAT'S...
      • A BOMB!!!
      • OH NO!!! THIS NEWS REPORT...
      • IS TURNING INTO A DISASTER REPORT!!!
      • BUT DON'T PANIC!
      • YOU HAVEN'T EVEN SEEN THE REST OF THE ROOM YET!
  • [After Report]
    • OH MY!
    • IT SEEMS EVERYTHING IN THIS AREA IS ACTUALLY A BOMB!
    • [Basketball]
      • THAT DOG'S A BOMB!
      • THAT PRESENT'S A BOMB!
    • [Dog]
      • THAT PRESENT'S A BOMB!
      • THAT BASKETBALL'S A BOMB!
    • [Present/Video Game/Movie Script/Glass of Water]
      • THAT DOG'S A BOMB!
      • THAT BASKETBALL'S A BOMB!
    • EVEN MY WORDS ARE...!
    • BRAVE CORRESPONDENT... IF YOU DON'T DEFUSE ALL OF THE BOMBS...
    • THIS BIG BOMB WILL BLOW YOU TO SMITHEREENS IN TWO MINUTES!
    • THEN YOU WON'T BE REPORTING "LIVE" ANY LONGER!
    • HOW TERRIBLE! HOW DISTURBING!
    • OUR NINE VIEWERS ARE GOING TO LOVE WATCHING THIS!
    • GOOD LUCK, DARLING!!
    • [Narrator] Ring...
    • [Alphys] D-don't worry!
    • [Alphys] I installed a bomb-defusing program on your phone!
    • [Alphys] Use the 'defuse' option when the bomb is in the DEFUSE ZONE!
    • [Alphys] N-now, go get 'em!
Bomb Defusal
  • [Alphys] Error Baby [Unused]
  • [Alphys] Error. [Unused]
  • [Alphys] Error, [Unused]
  • [After one bomb has been defused]
    • [Basket Bomb/Extremely Agile Glass Of Water]
      • [Alphys] Great job! Keep heading around the room!
      • [Alphys] Try to go for the one in the bottom-left next!
    • [Annoying Dog/Script Bomb]
      • [Alphys] Great job! Keep heading around the room!
      • [Alphys] Try to go for the one in the top-right next!
    • [Alphys] Great job! Head to the left next! [Present Bomb]
    • [Alphys] Great job! Head to the right next! [Game Bomb]
    • [If there is the last item left]
      • [Alphys] Great job! Head for the center! There's one left there! [Annoying Dog]
      • [Extremely Agile Glass Of Water]
        • [Alphys] Great job! Head for the center!
        • [Alphys] I'm using, uh, EM fields to trap the glass of water there!
      • [Alphys] Great job! There's only one left in the bottom-right! [Script Bomb]
      • [Alphys] Great job! There's only one left at the top! [Basket Bomb]
      • [Alphys] Great job! There's only one left at the top-right! [Present Bomb]
      • [Alphys] Great job! There's only one left at the bottom-left! [Game Bomb]
  • [Alphys] You couldn't even get one bomb...!? [Not defuse a single bomb, but ran out of time in the battle screen]
  • [Alphys] It's... it's... [Defuse four bombs but ran out of time in the battle screen on the fifth bomb]
Post-Bomb Defusal
  • [Protagonist defused all bombs in time]
    • WELL DONE, DARLING!
    • YOU'VE DEACTIVATED ALL OF THE BOMBS!
    • IF YOU DIDN'T DEACTIVATE THEM, THE BIG BOMB WOULD HAVE EXPLODED IN TWO MINUTES.
    • NOW IT WON'T EXPLODE IN TWO MINUTES!
    • INSTEAD IT'LL EXPLODE IN TWO SECONDS!
    • GOODBYE, DARLING!
    • AH.
    • IT SEEMS THE BOMB ISN'T GOING OFF.
    • [Narrator] Ring...
    • [Alphys] That's b-because!!!
    • [Alphys] While you were monologuing... I...!!!
    • [Alphys] I f... fix... Um... I ch-change...
    • OH NO. YOU DEACTIVATED THE BOMB WITH YOUR HACKING SKILLS.
    • [Alphys] Yeah! That's what I did!
    • CURSES! IT SEEMS I'VE BEEN FOILED AGAIN!
    • CURSE YOU, HUMAN! CURSE YOU, DR. ALPHYS, FOR HELPING SO MUCH!
    • BUT I DON'T CURSE MY EIGHT WONDERFUL VIEWERS FOR TUNING IN!!!
    • UNTIL NEXT TIME, DARLING!
    • [Alphys] W-wow... W-we really showed him, huh?
    • [Alphys] ...
    • [Alphys] H-hey, I know I was kind of weird at first...
    • [Alphys] But I really think I'm getting more...
    • [Alphys] Uh, more...
    • [Alphys] M-more confident about guiding you!
    • [Alphys] S-so don't worry about that b-big d-dumb robot...
    • [Alphys] I-I'll protect you from him!
    • [Alphys] A-and if it really c-came down to it, we could just t-turn...
    • [Alphys] Um, nevermind.
    • [Alphys] Later!
    • [Narrator] (Click...) [Unused]
  • [Protagonist did not defuse all bombs in time]
    • TOO BAD, DARLING!
    • YOU FAILED TO DEFUSE ALL OF THE BOMBS WITHIN THREE MINUTES!
    • NOW THE BIG BOMB IS GOING TO BLOW YOU TO SMITHEREENS!
    • READY, VIEWERS? HERE COMES THE MOMENT YOU'VE ALL BEEN WAITING FOR!
    • AHAHAH!
    • GOODBYE, DARLING!
    • AH.
    • IT SEEMS THE BOMB ISN'T GOING OFF.
    • [Narrator] Ring...
    • [Alphys] That's b-because!!!
    • [Alphys] While you were monologuing... I...!!!
    • [Alphys] I f... fix... Um... I ch-change...
    • OH NO. YOU DEACTIVATED THE BOMB WITH YOUR HACKING SKILLS.
    • [Alphys] Yeah! That's what I did!
    • CURSES! IT SEEMS I'VE BEEN FOILED AGAIN!
    • CURSE YOU, HUMAN! CURSE YOU, DR. ALPHYS, FOR HELPING SO MUCH!
    • BUT I DON'T CURSE MY EIGHT WONDERFUL VIEWERS FOR TUNING IN!!!
    • UNTIL NEXT TIME, DARLING!
    • [Alphys] B-boy... That was close, huh?
    • [Alphys] I guess a little closer than I would have liked.
    • [Alphys] I should have given you better directions...
    • [Alphys] A-and there j-just w-wasn't enough time...
    • [Alphys] W-well! That's Mettaton's fault, not mine!
    • [Alphys] I c-can't second guess myself now.
    • [Alphys] I'm f-finally starting to f-feel confident about g-guiding you.
    • [Alphys] I'll protect you from that mean old robot, n-no matter what!
    • [Alphys] If I have to, I'll even t-turn...
    • [Alphys] Um, nevermind.
    • [Alphys] We're over halfway to the core!
    • [Alphys] Let's go!
    • [Narrator] (Click...)

During the news segment, a ticker at the bottom of the screen reports the following news.

News Ticker Quotes
  • MTT-BRAND STILL TOP-RATED    ||    SCHOOL CANCELLED OVER REACTIVATED PUZZLES    ||
  • SCIENTIST DISCOVERS HEALTH BENEFITS OF USING COMPUTER (JUST KIDDING LOL)   ||
  • LOCAL METTATON VERY RICH FAMOUS AND GORGEOUS ||
  • TINY VOLCANO MONSTER TRIES ITS BEST, RECEIVES TINY APPLAUSE ||
  • PYROPE IRONICALLY MISSES INVITATION TO THIS SCENARIO "WOULD HAVE LOVED IT"  ||
  • LOCAL PLANE CREATES HUGE LINE AT STORE BY SAYING "IT'S NOT LIKE I WANT TO BUY THESE PRODUCTS OR ANYTHING" CASHIER CONFUSED   ||
  • HOTLAND TECHNICAL MALFUNCTIONS ACCEDE AND RECEDE IN LINEAR PROGRESSION THROUGHOUT AREA  ||
  • WOSHUA CLEANS UP LOCAL CRIME, LITERALLY FINDS CRIMINALS AND DOUSES THEM IN SOAP, CRIME DOESN'T GO DOWN BUT IT SMELLS AMAZING   ||
  • HISTORIC NEWS TICKER HEADLINE SHORTAGE ||

UNDERTALE the Musical

Mettaton overworld musical

Mettaton in a dress during the musical segment

Thirdly and finally, Mettaton traps the protagonist within a musical, where Mettaton sings about a forbidden love between him, a monster; and the protagonist, a human. He mentions how sad it is that they must be sent to the dungeon, before opening a trapdoor underneath them into a room with a colored tile puzzle. Mettaton announces that the protagonist must pass the colored tile puzzle within a set time before a line of flame comes at them from the side and burns them to death.

  • If the protagonist manages to complete the puzzle, Mettaton deactivates the flames "knowing" that Alphys would have done so.
  • If the protagonist fails, the flames draw near, only for Alphys to disable them.
    • If the protagonist has stepped on a green tile, Mettaton reminds them that the tile signals a monster, which turns out to be Mettaton himself.
    • If the protagonist has not stepped on a green tile, Mettaton repeatedly says "well" before acknowledging that the protagonist never stepped on a green tile, but still fights them.

Mettaton proceeds to engage the protagonist in battle after the tile puzzle. However, Alphys has one final installment on the phone she had given to the protagonist. This yellow button fires a projectile at Mettaton, which the protagonist can use in succession. Mettaton acts like he is defeated from such projectile and flees. If the protagonist does not activate yellow mode, Mettaton attacks with boxes until the protagonist has barely any health left.

Multicolor Tile Puzzle Quotes
Pre-Tile Puzzle
  • OH? THAT HUMAN...
  • COULD IT BE...?
  • ... MY ONE TRUE LOVE?
  • [Post-introduction]
    • ...
    • (YOU LOOK BORED, DARLING.)
    • (I WANT THIS TO BE A STELLAR PERFORMANCE, SO IF YOU WON'T GIVE IT YOUR ALL...)
    • (THEN I'LL SKIP AHEAD FOR THE AUDIENCE'S SAKE.)
    • (Perform?)
    • [Skip this]
      • (KA-SIGH...) (THE SHOW MUST GO ON!)
      • OOMPH! I AM SO OVERWHELMED WITH TRAGEDIES.
      • THE KING HAS ORDERED YOU TO WASTE AWAY IN THE CASTLE BASEMENT.
      • AND BEFORE WE EVEN HAD TIME TO SING A SWEET SONG ABOUT IT.
      • MY DEAR HEART! I CAN BARELY LOOK UPON YOU, KNOWING WHAT COMES NEXT...
      • WELL, TOODLES!
    • (UNDERSTOOD.) (LET'S KNOCK 'EM DEAD!) [Yeah]
  • [Lyrics to Oh! One True Love]
    • Oh my love
    • Please run away
    • Monster King
    • Forbids your stay
    • Humans must
    • Live far apart
    • Even if
    • It breaks my heart
    • They'll put you
    • In the dungeon
    • It'll suck
    • And then you'll die a lot
    • Really sad
    • You're gonna die
    • Cry cry cry
    • So sad it's happening.
    • SO SAD.
    • [Unused]
      • (Hmmm? Getting creative?)
      • (Dance with me, darling.)
      • (Oh! The audience can feel your passion!)
      • (Show the audience your passion!)
      • (So close... How passionate...)
      • (... do you need some help?)
      • (... what ARE you doing?)
      • (Don't stop now!)
      • (Look at you, leaping around the stage...)
      • (Can't keep your hands off, huh?)
      • (Is that how humans dance?)
      • (Humans are stranger than I thought.)
      • (Oh! They're really getting into it.)
      • (Moving so far...)
      • (Who can blame you?)
      • (Hmmm, I'll have to get used to it...)
      • (Even better than I thought...)
      • (So that's what it's like.)
      • (Dancing with... A human.)
      • (What a shame...)
  • SO SAD THAT YOU ARE GOING TO THE DUNGEON.
  • WELL, TOODLES!
  • OH NO! WHATEVER SHALL I DO?
  • MY LOVE HAS BEEN CAST AWAY INTO THE DUNGEON.
  • A DUNGEON WITH A PUZZLE SO DASTARDLY, MY PARAMOUR WILL SURELY PERISH!
  • O, HEAVENS HAVE MERCY! THE HORRIBLE COLORED TILE MAZE!
  • EACH COLORED TILE HAS ITS OWN SADISTIC FUNCTION.
  • FOR EXAMPLE, A GREEN TILE SOUNDS A NOISE, AND THEN YOU MUST FIGHT A MONSTER.
  • RED TILES WILL... ACTUALLY, WAIT A SECOND.
  • DIDN'T WE SEE THIS PUZZLE ABOUT A HUNDRED ROOMS AGO?
  • THAT'S RIGHT. YOU REMEMBER ALL THE RULES, DON'T YOU?
  • GREAT... THEN I WON'T WASTE YOUR TIME REPEATING THEM!!
  • OH, AND YOU'D BETTER HURRY.
  • BECAUSE IF YOU DON'T GET THROUGH IN 30 SECONDS...
  • YOU'LL BE INCINERATED BY THESE JETS OF FIRE!!
  • AHAHAHAHAHAHA! AHAHA... HA... HA!
  • MY POOR LOVE! I'M SO FILLED WITH GRIEF, I CAN'T STOP LAUGHING!
  • GOOD LUCK, DARLING!
Tile Puzzle
  • [Lyrics to Oh! Dungeon]
    • Oh my love
    • Has fallen down
    • Now in tears
    • We all will drown
    • Colored tiles
    • Make them a fool
    • If only they
    • Still knew the rules
    • Well that was
    • A sorry try
    • Now let's watch
    • Them fry

End of CORE Encounter

After the protagonist reaches the end of the CORE, they are once more confronted by Mettaton. This time, however, Mettaton reveals that he had re-arranged the CORE and hired monsters so as to attempt to kill the protagonist legitimately. He states that Alphys had set up an extensive plan to self-insert herself into the story because she liked the protagonist so much and wanted to feel important by helping them. All of the previous threats from Mettaton were entirely fake, and everything was acted out, and used by Alphys to ally herself further with the protagonist; Alphys plans to intervene in the fight between Mettaton and the protagonist by "deactivating" Mettaton and thus appearing heroic to them. This time, however, Mettaton has made plans to prevent Alphys's aid, so that he could have an actual battle against the protagonist, and locks the door to prevent Alphys from entering. He explains that he wants to take their SOUL so that he can leave the Underground and become a superstar on the Surface. This way, Asgore cannot destroy the Barrier and re-ignite the war between humans and monsters, which would take a toll on his views.

Mettaton EX

Ohhhh my.
If you flipped my switch, that can only mean one thing.
You're desperate for the premiere of my new body.
How rude...
Lucky for you, I've been aching to show this off for a long time.
So... as thanks, I'll give you a handsome reward.
I'll make your last living moments...
ABSOLUTELY beautiful!

Mettaton after his transformation

Mettaton overworld trashed

Mettaton's overworld wreck sprite, if he's killed

Mettaton EX battle armless

Mettaton lacking his arms

Mettaton attacks the protagonist, but under the advice of Alphys, the protagonist tricks Mettaton into turning around so that they can flip the switch on his back to make him vulnerable. This switch transforms Mettaton into Mettaton EX and begins the true game show. By taking damage, using popular brand items, or using specific ACTs to raise the Ratings of the show to above 10 000 (or 12 000, if he still has legs), Mettaton stops fighting.

To his surprise, this is the highest-rated episode he has ever had and begins to take call-ins from viewers. Several callers, the first of which is Napstablook, convince Mettaton that he is highly valued in the Underground, and is the primary (perhaps only) source of entertainment that many of the inhabitants have. He is moved by their passion for the show and decides that he no longer wishes to leave the Underground, as well as explaining that the protagonist is strong enough to defeat Asgore. He then mentions about his inefficient power consumption, and shuts down, leaving only his upper torso remaining. Alphys then manages to unlock the door and assess Mettaton EX's state, being thankful that he was simply out of power. She acts very stressed at the thought of Mettaton being truly killed. After that, Mettaton's body can be found in the Lab and is undergoing repairs.

Mettaton EX overworld limbless

Mettaton's deactivated body after being spared

If Mettaton EX is killed, his overworld sprite reverts to his box form, though visibly severely damaged. Examining the wreck warrants the description "It's completely trashed."

Mystery Key

If the protagonist purchases the Mystery Key from Bratty and Catty, they can enter the house to the right of Napstablook's. The room is primarily pink, with a bed, a star-patterned pillow, star-patterned wallpaper, a pink TV, a window, and a star imprinted rug. Through a series of diaries, the house is shown to be owned by another ghost known as "Napstablook's cousin" within the game (though Papyrus states that his headcanon name for him was "Happstablook", and the room name of his house is room_water_hapstablook). After meeting Alphys, she designed a body for Mettaton to inhabit.

Using the Mystery Key during Mettaton EX's fight prompts him to pretend "it isn't there."

True Pacifist Route

Mettaton overworld legs

Mettaton, as seen in the True Pacifist Ending Credits

After the protagonist has finished their date with Alphys, Mettaton's deactivated body can be found on the second floor of the Lab, atop her work table for repairs.

In the True Lab, there is a log entry stating that Alphys fears that Mettaton may not talk to her anymore after receiving his new body due to his attachment to fame.

At the end of the game, when all of the Monsters encountered as bosses have united before Flowey intervenes, Mettaton EX shows his leg from the right side of the screen. He tells Alphys and Undyne that they should kiss already since the entire crowd wants it.

Epilogue

After defeating Asriel, if the protagonist returns to Waterfall before exiting New Home, Mettaton is seen standing outside his old house, having recruited Napstablook as his sound mixer and Shyren as his backup singer. During the credits, he is shown on tour, able to use his original box form in conjunction with his new body's legs.

True Pacifist Ending Epilogue Quotes
Mettaton EX can be found outside of his own house, which is right next to Napstablook's.
  • 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?
  • [Narrator] (...)
  • [Narrator] (A yes or no prompt was not provided.)
  • Fabulous! I completely agree!
  • Oh, Frisk. Why don't you go see how Alphys is doing?
  • Since the flash of light she's been working hard to set everything right.
  • Ha-Ha. About time, huh?

Genocide Route

OH? HOW SASSY.
YOU'RE JUST ITCHING TO GET YOUR HANDS ON ME, AREN'T YOU?
WELL... T-O-O B-A-D!
THIS WORLD NEEDS STARS MORE THAN IT NEEDS CORPSES!
TOODLES!

Mettaton in the Lab on the Genocide Route

Mettaton shows up in Alphys's Lab and tells the protagonist that he will not battle them, knowing that he is no match for them. He shows up at the CORE and realizes that the protagonist means not only to kill monsters but all of humanity as well. Claiming his original functions as a human eradication robot were never fully removed, he transforms into Mettaton NEO. Despite all the buildup, he has no attacks, and the protagonist can destroy him in a single attack.

Mettaton NEO has two different variations depending on whether the player is on track for the Genocide Route. This is determined by three conditions. Mettaton NEO's Genocide Route variation requires all three of these conditions to be met:

Due to a glitch, the game always counts Royal Guards/Muffet as killed if the previous encounter was killed. This applies even if Muffet or Royal Guards are spared, which would yield Mettaton NEO's Genocide Route variation (assuming the Hotland/CORE kill count is met) despite the Genocide Route having been aborted.

For Mettaton NEO's Genocide Route variation, any attack that hits will be scripted to inflict anywhere from 900,000 to 999,999 damage and destroys Mettaton NEO in a single hit. Missing does not abort the Genocide Route as the battle continues until Mettaton NEO is destroyed. Upon his death, Mettaton NEO laments that the protagonist does not want to join his fan club and the protagonist's EXP is set to 50,000, resulting in their LOVE reaching 19.

If any of the three above conditions are not met, Mettaton NEO will be in a different variation that ultimately causes the Genocide Route to be aborted and leads to the Alphys Ending of the Neutral Route. He is still destroyed in a single attack; however, this attack only deals 30,000 to 39,999 damage. Mettaton NEO points out the protagonist's lack of killing intent, telling them that they are not "absolutely evil" before dying. This event causes the protagonist to only gain 10,000 EXP.

In Battle

For an in-battle description, see Mettaton/In Battle.

Relationships

The Protagonist

Initially, Mettaton actively antagonized the protagonist under the assumption his human eradication functions along with directive errors gave him an intensified hate for humans and a need to murder them. This was proven to be an act, however, as Mettaton mentions loving humanity, but continued to go against the protagonist on his terms to take their SOUL and prevent a possible war by Asgore. After their battle, however, he was confident the protagonist was strong enough to avoid this themselves.

Alphys

Mettaton initially bonded over their common interest in the culture of humanity, and he is grateful of Alphys for making his physical body. Soon after he receives his initial body, he often belittles her and her interests. However, he owed Alphys enough to play along with her plan to act out the role of a malfunctioning robot before eventually going on his agenda with the protagonist. Despite this, in the ending where he is given the role as king, he mentions how he regrets being cruel to her before she went missing.

Napstablook

Before he got his body, he was Napstablook's cousin, helping them with the snail farm and living next-door to them. They seemed very close, to the point that Mettaton originally declared that he would never leave them behind and often called them Blooky (an alias he would keep). Although he had since left them for stardom, he obviously cared for his cousin, looked regretful when Napstablook called into the program to give gratitude for his show ever since he left. Once he had his permanent new body, he immediately recruited his cousin on his tour so they could stay together.

Gallery

Trivia

  • If "Metta", "Mett" (case insensitive) or "MTT" is typed for the fallen child's name, the response becomes "OOOOH!!! ARE YOU PROMOTING MY BRAND?" and allows the name to be used.
  • The name "Mettaton" can be interpreted and decoded into various different forms:
    • "Mettaton" is similar in pronunciation and spelling to "Metatron," the highest angel in Judeo-Islamic lore, also known as the Voice of God and Recording Angel, whose name is transliterated into Greek as MTT. This could be a reference to Shin Megami Tensei's Metatron specifically, as both have metallic appearances, have similar poses, and are very powerful late-game bosses.
    • The name could also be a combination of "metal" and "automaton" or "zettaton."
    • "Mettaton" may be a portmanteau of "Meta" and "ton," as Mettaton offers many instances of meta-commentary on the structure of Undertale. Examples include referencing the viewer if one picks "Don't Know" for Alphys's crush question during the quiz show, his words turning into bombs in the news report, changing the window name during his musical segment, mentioning room numbers before his colored tile maze, discussing Toriel plushies in the epilogue and offering a newscast to the fourth wall while the protagonist is visible on-screen.
  • Mettaton's designs show similarities to Undyne's forms.
    • Mettaton EX has shoulder pads similar to Undyne's, both of which are longer and spikier in the Genocide Route.
    • Both have one of their eyes covered in the Neutral and True Pacifist Routes (Undyne with her left eye covered, and Mettaton with his right). In the Genocide Route, these are revealed, showing Mettaton NEO's sparkling/crosshair eye and Undyne the Undying's empty socket that frequently emits a spear-shaped flash of light.
      • Notably, Mettaton NEO can be encountered in an aborted Genocide Route (Alphys Ending, Near Genocide) unlike Undyne the Undying.
    • Both of their forms on the Genocide Route feature hearts on their chest pieces.
    • Both of their battles on the Genocide Route feature the Battle Against a True Hero leitmotif.
    • Undyne holds a spear in her right hand, and Mettaton NEO has an arm cannon replacing his right hand.
  • Mettaton's design is also similar to other characters outside of Undertale.
  • Mettaton may be inspired by the character of TV Dinnah from the 2009 video game Little King's Story, another TV presenter boss fight who wants to cook the protagonist on a cooking show and gives them a life-or-death quiz. TV Dinnah also somewhat resembles Mettaton's box form. Little King's Story was directed and produced by Yoshiro Kimura, whom Toby Fox has praised in-person during an interview for creating games that inspired Undertale.[2]
  • In his box form, Mettaton's overworld sprite has five squares under the main screen, while his battle sprite only has 4.
  • Out of every character in the game, Mettaton has the most songs associated with him, at 14 songs (15 if CORE is counted).
  • Along with Flowey, Mettaton is one of the only characters in the game to have a voice clip, exclaiming "Oh, yes!" when he transforms into Mettaton EX, and "Yeah!" when attacked in his Mettaton EX form or when the protagonist steps on a green tile in the Multicolor Tile Puzzle.
  • The video game found during the MTT News scene is heavily implied to be Undertale itself. It is graphically similar to the Undertale box cover and uses the same sprite as the game behind Mysterious Door that was programmed by the dog. Mettaton states that his appearance doesn't occur until three-fourths of the way through the game and that the game is one where the player should check everything twice if checked twice (referencing the dialogue changing in the game if something is checked or spoken to twice.)
  • In the trailer announcing the game's special edition, Mettaton's hands are shown motioning towards the boxed special edition; it was confirmed in a Twitch livestream of Super Mario RPG by Legends of Localization that the costumed hands filmed for the sequence belong to Heidi "Poe" Mandelin, wife of Clyde "Tomato" Mandelin, who was involved in the fan translation of Mother 3, and also co-wrote the book Legends of Localization Book 3: UNDERTALE, a book about the game's Japanese localization. Poe also stated that the sequence was filmed in reverse; the footage was then played backwards, to achieve the final shot seen in the trailer.
  • Several unused sprites for Mettaton EX's head show his right eye, and what appears to be the machinery on his face.[3]
  • The answer choices to the question What are robots made out of? in his quiz show have several references.
  • Mettaton's box form is identical to the console that operates the colored tile maze in Snowdin Forest, and this machine may have been Mettaton himself; during his colored tile maze, Mettaton remarks that the protagonist has seen the puzzle "ABOUT A HUNDRED ROOMS AGO" and presumes that they remember the rules.
  • During Mettaton's singing performance to the protagonist, the program window is renamed to "UNDERTALE the Musical."
  • Mettaton EX recognizes answers for "sexy," "foxy," and "tantalizing" in his essay question, but since the X and Z keys cannot be inputted without holding CTRL, they are only possible inputs in the PlayStation and Nintendo Switch versions.[5][6]
  • Mettaton EX originally saved images of all the essays to the computer's hard drive. This feature was removed for being too buggy.[7]
  • According to the Undertale Kickstarter, there were originally plans for the protagonist to have a robot husband, which is presumed to be Mettaton.[8] This feature ended up being cut out of the final version of the game for unknown reasons.[9] Additional evidence that points to this event is an unused variation of the Start Menu that can be found in the game's files and explains why the full menu suddenly includes Mettaton and Napstablook.
  • In Undertale v1.001, Mettaton's stats for his box form have been changed from "10 ATK 999 DEF" to "ATK 30 DEF 255." 255 is the maximum value of an unsigned 8-bit integer, and is often the maximum value possible for things in video games.
  • The Mettaton EX fight, according to Toby, was the hardest one for him to design.[10] There were many attack ideas for the Mettaton EX fight that were never used, such as more tiny Mettaton robots, and disco dancing robots that threw stars.[11][12][13]
  • Mettaton EX slightly resembles Bob Sparker and was inspired by the character.
  • Based off of old official artwork by Temmie Chang it is likely that Mettaton was originally intended to have claw hands.[14][15]
  • Mettaton's line when you check the sink in the cooking show "THIS ISN'T A SHOW ABOUT WASHING YOUR HANDS, DARLING. THAT'S ON WEDNESDAYS!" suggests that Undertale does not take place on a Wednesday. However, the HUD during Papyrus's date[16] and the River Person[17] can allude to Wednesday if that is the computer's date; the actual day of the week is likely intentionally ambiguous.
  • Spamton NEO, a secret boss in Undertale's spin-off game Deltarune, is a direct reference to Mettaton NEO.
    • Spamton mentions Mettaton NEO's theme, Power of "NEO", by name during his battle. The melody of Power of "NEO" can also be heard in Spamton NEO's boss theme, BIG SHOT.
    • After defeating Spamton NEO, another character implies that his body was created by the ghost who would become Mettaton in Deltarune's continuity.
    • If Spamton NEO is defeated through violence in a neutral route, he attempts (and fails) to transform into "Spamton EX".
    • On a Snowgrave route, Spamton says his NEO body is "known for its high defense", an ironic reference to the fact that Undertale's Mettaton NEO is killed in one hit.
  • In the MTT News segment, the line "THIS NEWS REPORT... IS TURNING INTO A DISASTER REPORT!!!" is a reference to the 2003 Playstation 2 game Disaster Report.[18]

References

  1. @NerdbotMk2 @fridayafternoon I won't lie if I said I wasn't thinking about you a lil when I put him in - @FwugRadiation on Twitter, September 22, 2015. Archived on November 07, 2015.
  2. 『moon』は日本語版しかないので、僕の日本語がもっと上達するなり、英語版が出るなりしないと完全にはやり込めないんですが、 "勇者が悪役”ということや、 "モンスターは必ずしも悪者ではない”というゲームのコンセプト自体に感銘を受けました。 - 『UNDERTALE』トビー・フォックス×『東方』ZUN×Onion Games木村祥朗鼎談──自分が幸せでいられる道を進んだらこうなった──同人の魂、インディーの自由を大いに語る (October 19, 2018.) 電ファミニコゲーマー.
  3. Sprites "spr_mettface_defeated_" 9 through 11. Imgur
  4. Final Fantasy VI Adv: Oh, Maria - YouTube
  5. Question about Mettaton's Essay - Reddit
  6. Undertale - The Cutting Room Floor
  7. Originally Mettaton actually saved images of all of your essays to the hard drive. But it was buggy so I removed it. - @FwugRadiation on Twitter, January 12, 2016. [deleted]
  8. "Seriously, you can literally have a robot husband." – Toby Fox. June 24, 2013. Kickstarter.
  9. "After 2.5 years... some critical features promised in the KS changed. Example: I said you could marry a robot. Actually, you can't marry a robot." – Toby Fox. June 30, 2015. Kickstarter.
  10. I think the Mettaton battle was actually the hardest one for me to design. I made a lot of bullet objects/attack ideas I didn't use since the action is "shooting," the action of "aiming&shooting" had to be important. But shooting&aiming in shmups (like Touhou) is often not actually about "aim&fire!" but "hold down the shoot button and position yourself under the enemy" for the most part. - Toby Fox (@tobyfox) on Twitter, June 13, 2016.
  11. I don't remember all the unused attacks but I wanted to have more tiny mettaton robots besides the umbrella ones that blow kisses - Toby Fox (@tobyfox) on Twitter, June 13, 2016.
  12. There was a disco dancing one that threw stars but it wasn't fun. I think that's it. - Toby Fox (@tobyfox) on Twitter, June 13, 2016.
  13. All of Mettaton EX's unused attacks restored (Undertale) - YouTube
  14. hooray!! we reached 51k!! Thank you all so much for your contributions and interest!! - temmiechang on Tumblr, July 25, 2013.
  15. (undertale spoilers!!!!) look at what @tuyoki made me 2 years ago for my birthday that i've been sitting on until now - @FwugRadiation on Twitter, October 11, 2015. [deleted]
  16. WED - Dating HUD, on Wednesdays
  17. Tra la la. Somewhere, it's Wednesday. So be careful. - River Person, on Wednesdays
  18. Legends of Localization Book 3: UNDERTALE, page 200, ISBN 9781945908019

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