Mettaton EX

Mettaton EX (JP: メタトンEX) is the fourth boss in Undertale's Neutral and True Pacifist Route. He is a transformed version of Mettaton who appears at the end of the CORE, blocking the protagonist's way to New Home.

Profile

Appearance

After having the switch on his back flipped, 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.

Main story

Neutral Route

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

Tired of pretending to be a "malfunctioning" robot, Mettaton begins an encounter. Mettaton explains he wishes to save humanity from Asgore's plan for the war, and wants to claim the protagonist's SOUL so he can cross the barrier and earn fame. In his regular form, Mettaton is not vulnerable. During the encounter, Alphys calls the protagonist to inform them of the switch on Mettaton's back. The protagonist tricks Mettaton to turn around by claiming there is a mirror behind him. Mettaton turns around to try to reassess his appearance, and the protagonist toggles his switch. This switch transforms Mettaton into Mettaton EX and begins his premiere.

Mettaton lacking his arms.

Whether the protagonist chooses to perform with ACTs or FIGHT, Mettaton EX gradually sustains damage and loses body parts as the battle progresses, starting from his arms, then his legs.

If choosing to ACT, the show's Ratings are visible. The protagonist can raise Mettaton EX's Ratings to above 10,000 (or 12,000, if he still has legs) by taking damage, using popular brand items sold by Burgerpants at the MTT-Brand Burger Emporium, or using specific ACTs and items.

To his surprise, this is the highest-rated episode he has ever had. Mettaton EX acknowledges the viewer call-in milestone was reached, and accepts call-ins from viewers for his finale show in the underground. 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 monsterkind's passion for the show, and decides that he no longer wishes to leave the underground, as well expressing his confidence that the protagonist can defeat Asgore and protect humanity. Mettaton EX also acknowledges his form's inefficient battery consumption, and shuts down, leaving only his upper torso remaining.

Mettaton's deactivated body after being spared.

Alphys then manages to unlock the door and assess Mettaton EX's state, being thankful that he was simply out of power. She is stressed at the thought of Mettaton being killed.

If Mettaton EX is killed, he reverts to his box form, though irreparably damaged. Examining the wreck warrants the description, "It's completely trashed." Additionally, many monsters throughout Hotland comment on Mettaton's absence, and some are in a somber mood.

True Pacifist Route

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

Mettaton, as seen in the True Pacifist ending credits.

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, Mettaton is on tour, with Napstablook, Shyren, and Burgerpants also on stage. Mettaton is able to use his original rectangle form in conjunction with his new body's legs.

In battle

Attacks

SOUL modes

Yellow mode is set throughout the battle against Mettaton before and after his transformation.

Patterns

Before transformation

• Mettaton introduces attacks that are later used when he transforms into Mettaton EX, namely boxes and bombs. If Mettaton is not turned around right away, he deploys a mixture of boxes, bombs, and lightning that cannot be shot by the Yellow SOUL. The lightning attack is not used by Mettaton EX.

After transformation

Mettaton EX's attacks all consist of an arrangement of several objects:

• Copies of Mettaton's legs stick out from either side of the box and scroll downwards. They can be either moving inwards and outwards or not move; this can be controlled by shooting them, which stops the moving legs or causes the motionless legs to begin moving again.
• Copies of Mettaton's legs quickly emerge from the side of the screen. An exclamation mark appears in the area that they will appear in before this attack is used.
• Small rectangular Mettatons glide down on umbrellas. As they reach the bottom of the screen, they begin to toss hearts that are embroidered with the letter M: they will often toss a second set upwards just as they are leaving the bottom of the screen.
  • This attack is also used by Alphys as a Lost Soul during the Asriel boss fight in the True Pacifist Route.
• Bombs marked with a plus sign travel downwards, which explode into plus-shaped blasts when shot with the Yellow SOUL. The blast spreads slowly enough that it can be dodged by moving aside, as long as the bomb was detonated sufficiently far away. The explosions can destroy blocks and trigger other bombs.
• White squares marked with black circles travel downwards (and sometimes side to side), which are broken by a shot from the Yellow SOUL.
• The bullet board contracts to four blocks wide, and lines of bombs and white squares with black circles (usually three bombs and one square or three squares and one bomb) travel downward, then a "rewind" button appears and they travel back upward in the same formation, with destroyed parts remaining destroyed.
• Long segmented arms resembling Mettaton's travel downwards, with sliding orange-yellow boxes along their length which, when shot, toggle the arm between retracted and non-retracted states (thus, they should only be shot once).
• Mettaton's heart emerges from the square on his waist and shoots lightning-bolt shaped projectiles either in a circular blast formation or single linear shots (which only happens when he loses all of his limbs). Firing at his heart ends Mettaton's attack earlier; not shooting his heart still causes his limbs to fall off due to being a scripted event. Contrary to popular belief, attacking Mettaton's heart this way does not count as FIGHTing him. When only his torso exists, his heart will fight for him for the rest of the battle until he is either killed or the ratings reach 10,000.
• A disco ball appearing from the top of the square projecting laser beams in either blue or white, which can be toggled in color by shooting the disco ball. They rotate at a variable pace: when blue, they count as blue attacks, when white, as normal attacks.
• The bullet board contracts to being only two blocks wide, and pairs of objects rain down, consisting of a bomb on one side and a solid white block on the other. The block can only be destroyed by shooting the companion bomb, and so it is necessary to shoot the bomb and quickly move under the block to avoid damage from the downward part of the explosion.
• Mettaton calls for a "union-regulated break" and the words "Happy Breaktime!" appear on the bullet board. This is a gray attack, and simply a free turn. It always comes after two two-width block / bomb attacks in a row, and Boasting works normally even though it is impossible to get hit during this turn.

Attack Order
Turn	Max Boast Ratings	Description	Details
Box Form
1	-	Blank	Pea Shooter Dialogue if Mettaton is shot.
2	-	Box Swarm	A swarm of boxes that slightly shift left and right.
3	-	Arms	2 keyless arms that leave space to the left and right to get past by breaking blocks, followed by a regular arm with the yellow square in the center.
4	-	Arms + Block Wall	2 Arms with their yellow squares to the left then right, then a wall of blocks with a bomb in the center.
5	-	Phone Call	Unlocks the "Turn" option to progress to Mettaton EX.
6+	-	Spark Swarm	A swarm of sparks, blocks, and bombs falls from the top of the screen. Loops until the Turn ACT is selected.
Mettaton EX
1	300	Legs	A leg from the left, followed by a leg from the right, followed by two sets of 2 legs. The first two legs must be shot in order to move them out of the way. All can be avoided by not moving up or down.
2	285	Bombs + Bot Swarm	4 Bots on either side with 5 bombs in the middle. Can be cleared by focusing the bots on one side, and then moving up/across the top when the other set starts firing.
3	315	Legs 2	A set of 3 legs from the left, a gap between boxes to move through, then 3 legs from the right.
4	285	Arms	An arm with the yellow square to the left, 5 bots, then an arm with the yellow square to the right.
5	3	Essay	See #Essay for essay details.
6	900	Heart to Heart	Mettaton's heart comes out and launches lightning sparks in a circle while two bots come down from the sides. Repeats up to 6 times until the attack ends. Uses reduced damage table. Hitting the heart enough times ends the attack early.
7	375	Bot Swarm	A swarm of 9 bots comes down from the top of the screen. Attack ends early if all bots are destroyed.
8	405	Dance	After a considerable delay, the disco ball starts rotating the light beams, 5 of which will reach the soul. Shooting the disco ball flips the beams colors. Getting hit 2+ times causes subsequent dance attacks to be slower and take longer.
9	Fast: 289.5 Slow: 405	Dance (Fast)	The disco ball starts rotating immediately, and also rotates faster than in the previous attack. 11 beams will reach the soul. If 2+ hits were taken during turn 8 attack, it behaves identically to that attack instead.
10	315	Bombs	A set of 4 bombs and blocks on alternating sides will come down from the top of the screen. The blocks can only be destroyed the bomb next to them. Getting hit 2+ times causes the turn 11 bomb attack to be slower, while getting hit all 4 times causes the turn 18 bomb attack to be slower. Destroying the last bomb will end the attack early.
11	240	Bombs (Fast)	A set of 6 bombs and blocks on alternating sides will come down from the top of the screen. The blocks can only be destroyed the bomb next to them. Getting hit 2+ times in the previous attack causes the bombs to move slower. Destroying the last bomb will end the attack early.
12	165	Break	There are no damaging attacks.
13	900	Heart to Heart (Arms)	Mettaton's heart comes out, generates a shield of blocks, launches lightning sparks in a circle while, and launches the blocks out. Repeats up to 4 times until the attack ends. Uses reduced damage table. Hitting the heart enough times ends the attack early.
14	300	Reverse	Sets of 4 bombs/blocks come down from the top of the screen, and then reverse direction when enough time has passed. Only 3 will reach the soul's starting position. Getting hit 2+ times will cause the next attack to move slower.
15	330	Reverse (Fast)	Sets of 4 bombs/blocks come down from the top of the screen faster than the previous attack, and then reverse direction when enough time has passed. Only 3 will reach the soul's starting position, but the 4th will come closer than it did in the previous attack. If 2+ hits were taken in the previous attack, the walls will be slower and the 4th will not come as close.
16	247.5	Box + Bomb Swarm	A dense swarm of boxes and bombs comes from the top of the screen.
17	220	Box + Bomb Swarm (Fast)	A dense swarm of faster boxes and bombs comes from the top of the screen.
18	300	Bombs (Random)	A set of 6 bombs and blocks on random sides will come down from the top of the screen. The blocks can only be destroyed the bomb next to them. Getting hit 4+ times in turn 10 causes the bombs to move slower. Destroying the last bomb will end the attack early.
19	1050	Heart to Heart (Legs)	Mettaton's heart comes out with two bombs surrounding it. It launches a circle of lightning sparks followed by a swarm of legs coming in from the left than right. Repeats up to 5 times until the turn ends. Uses reduced damage table. Hitting the heart enough times ends the attack early. After this attack, the amount of ratings needed to spare drops from 12,000 to 10,000.
20	2800	Heart to Heart (Laser)	Mettaton's heart comes out and floats up, before it then makes a fast movement before firing 3 lines of lightning sparks in varying directions relative to the soul's location when it started firing. Repeats up to 19 times until the turn ends. Can be fairly easily dodged by sticking to the bottom and moving left/right the entire way when it starts firing, trying to be on the opposite side as the heart. Uses alternate reduced damage table. Hitting the heart enough times ends the attack early. Ratings from most sources boosted during (but not before) this turn, and during (and before) all subsequent turns.
21	Fast: 675.5 Slow: 945	Dance Fast	Uses the same attack as turn 9, including slowed version conditions.
22	875	Bot + Spark Swarm	A swarm of 12 lighting sparks and bots comes down from the top of the screen. Attack ends early if all bots are destroyed.
23	910	Reverse (Long)	Sets of 4 bombs/blocks come down from the top of the screen, and then reverse direction when enough time has passed. Only 4 will reach the soul's starting position.
24	700	Bombs (Random Fast)	A set of 7 bombs and blocks on random sides will come down from the top of the screen. The blocks can only be destroyed the bomb next to them.
25	2800	Loop from 20	Uses the same attack as before and sets the current turn to be turn 20. Followed by turn 21. Unlike turn 20, before this attack, boosted ratings are not obtained from things that take place before this turn.

Damage

Rather than directly using the attack stat, Mettaton EX (and its preceding box form) use custom damage tables in addition to those caused normally by the protagonist's HP. Some of the damage changes can only be seen by the use of armor to survive a hit.

Assuming no armor and LV 1, all attacks, with the exception of the heart-to-heart attacks, generally do 6 damage, or 7 at full HP. This means that 3 consecutive hits can be survived before needing to heal to survive another. Additionally, these attacks always leave the protagonist's HP at 1, which can be exploited for increased ratings from Pose.

Damage Table
HP Remaining	Base Damage	HP Based Bonus Damage	Raw Damage	0 DF (Stats Screen)
90+	10	+8	18	16
80-89	10	+7	17	15
70-79	10	+6	16	14
60-69	10	+5	15	13
50-59	10	+4	14	12
40-49	10	+3	13	11
30-39	10	+2	12	10
21-29	9	+1	10	8
20	9	+0	9	7
5-19	8	+0	8	6
1-4	6	+0	6	4

Damage Table - Reduced (Heart to Heart)
HP Remaining	Base Damage	HP Based Bonus Damage	Raw Damage	0 DF (Stats Screen)
90+	9	+8	17	15
80-89	9	+7	16	14
70-79	9	+6	15	13
60-69	9	+5	14	12
50-59	9	+4	13	11
40-49	9	+3	12	10
30-39	9	+2	11	9
24-29	9	+1	10	8
24-29	8	+1	9	7
16-20	8	+0	8	6
8-15	7	+0	7	5
3-7	6	+0	6	4
1-2	5	+0	5	3

Damage Table - Reduced Alt (Heart to Heart - Heart Laser)
HP Remaining	Base Damage	HP Based Bonus Damage	Raw Damage	0 DF (Stats Screen)
90+	9	+8	17	15
80-89	9	+7	16	14
70-79	9	+6	15	13
60-69	9	+5	14	12
50-59	9	+4	13	11
40-49	9	+3	12	10
30-39	9	+2	11	9
21-29	8	+1	9	7
20	8	+0	8	6
12-19	7	+0	7	5
4-11	6	+0	6	4
1-3	5	+0	5	3

Strategy

Mettaton EX in battle, as Death by Glamour plays.

To defeat Mettaton EX without killing him, the protagonist must survive until his arms and legs are blown off and achieve a show rating of 10,000 or more; if his limbs are not blown off, a show rating of 12,000 or more ends the battle. Mettaton's limbs fall off regardless of whether or not his heart is shot, but shooting it ends his turn earlier.

For those who plan on killing Mettaton, methods that decrease ratings should be used, as the ratings may hit 10,000 before the protagonist kills Mettaton. Methods that decrease ratings include writing a curse word during the essay and eating Junk Food, so bringing a full inventory of Junk Food is advised. Waiting between turns also steadily decreases ratings, although only 999 can be lost this way. As well his DF decreases by 5 every turn after turn 20.

Ratings can be boosted in several ways, most of which give extra ratings after 20 turns have passed, which is after the legs have fallen off.

Ratings Table
Method	Ratings	Turns 20+	Notes
Starting Amount	4000		Decay starts immediately so this number may not be seen
Passive Decay (during the protagonist's turn)	-7.5/sec		Lasts for 2m 13.3s for a maximum amount of 999 ratings that can be lost in this way
Boast	+45/sec	+105/sec	Boosts end when getting hit (also triggering a "Disappointment" cut) or when the essay is loaded.
Shooting things during Mettaton's Turn	+20 (Heart, Robot, Bomb, Block) +5 (Legs, Disco Ball)		No popup display
Dramatic (Pose)	+100 (Default) +150 (HP is less than 2/3 of max) +250 (HP is less than 1/2 of max) +400 (HP is less than 1/4 of max) +500 (HP is less than 4 HP) +600 (Exactly 1 HP)	2x	Checks are done in the listed order, meaning the variant that gives the most points is always selected.
Violence (Take damage)	+50 (1st time) +25 (2nd time) +20 (3rd time) +15 (4th time) +10 (5+ times)	2x
Disappoint (Take damage while boasting is active)	-100 (1-5 times) -50 (6-20 times) -1 (21+ times)	1x	Ends the boast ratings boost. All subsequent hits that turn give the normal "Violence" boost.
Justice (Take damage after using Heel Turn)	+100	2x
Action (Attack Mettaton)	+300 (1st time) +200 (2nd time) +150 (3rd time) +100 (4th time) +50 (5+ times)	2x
Fashion (Equip an armor that has not already been equipped)	+1500	2x	Equipping The Locket does not grant this boost, however it can't legitimately be obtained for the fight as it's a Genocide Route item obtained after fighting Mettaton NEO. This is unlike the Heart Locket, which does grant this boost despite only being obtainable after fighting Mettaton EX.
Fetching (Use the Stick)	+700 (1st time) +1 (2+ times)	2x
EatingGarbage? (Eat Junk Food)	-50	1x
OnBrandFood (Eat Starfait or Legendary Hero)	+300 (1st time) +200 (2+ times)	2x	Shared counter
OnBrandFood (Eat Glamburger)	+500 (1st time) +300 (2+ times)	2x
OnBrandFood (Eat Steak in the Shape of Mettaton's Face)	+700	2x
Writing (Essay)	-200 to +360 (see #Essay)	2x if positive	To get the most ratings (+360), stringing 4 compliments together is necessary, such as in "hotfinenticute". "Leg" grants +350 for only 3 characters. Certain insults such as "ugly", "jerk", or "idiot" deduct 200 ratings.

Essay

Early in the battle, Mettaton asks the protagonist to write an essay about what they like most about him. Listed by priority:

• Writing certain swear words or "BEPIS" results in the loss of 150 points, which causes Mettaton to exclaim that the show is family-friendly.
• Writing "TOBY" earns 300 points, Mettaton saying that Toby sounds sexy.
• Writing "I LOVE YOU" or "I LOVE YOUR" earns 250 points, Mettaton saying that's a touching confession.
• Writing a word that Mettaton deems insulting prompts him to tell the protagonist that this is an essay about him, not them. This will lose 200 points.
• Writing "LEG" earns 350 points, which is the second highest amount, being the 'correct answer.'
• Writing "DANCING" earns 250 points, Mettaton saying that he is self-taught.
• Writing "ARMS" earns 250 points, Mettaton commenting that most people talk about his legs, but embrace them for their writing anyways.
• Writing "VOICE" earns 200 points, Mettaton commenting that he has the voice of a siren.
• Writing "HAIR" earns 200 points, Mettaton saying that he uses metal hair gel.
• Writing compliments earns different amounts depending on how many compliments are made. The list includes: beaut, hot, pretty, handsome, gorgeous, sparkl, charm, attract, cute, smokin, good look, goodlook, good-look, grace, comely, fine, looker, dreamboat, stun, shapely, ravishing, allur, entic, seduct, enchant, appeal, adorable, radiant, capitvat^[sic].
  • Writing four or more compliments (for example, "HOTFINENTICUTE") earns 360 points, the highest amount that can be achieved.
  • Writing three compliments earns 280 points.
  • Writing two compliments earns 250 points.
  • Writing one compliment earns 200 points.
• If none of these requirements are met, Mettaton gives points and different remarks based on the length of the essay.
  • Writing less than 13 characters earns 80 points.
  • Writing an essay 13-49 characters long earns 100 points. Mettaton says the protagonist gets a gold star.
  • 50-89 earns 120. Mettaton says it's a great answer.
  • 90-139 earns 150. Mettaton is impressed with how passionate the protagonist is about them, even though he doesn't understand what they said.
  • 140 and longer earns 180. Mettaton suggests the protagonist write a book.

Quotes

Pre-battle

• OH YES. THERE YOU ARE, DARLING.
• IT'S TIME TO HAVE OUR LITTLE SHOWDOWN.
• IT'S TIME TO FINALLY STOP THE "MALFUNCTIONING" ROBOT.
• ... NOT!!!
• MALFUNCTION? REPROGRAMMING? GET REAL.
• THIS WAS ALL JUST A BIG SHOW.
• AN ACT.
• ALPHYS HAS BEEN PLAYING YOU FOR A FOOL THE WHOLE TIME.
• AS SHE WATCHED YOU ON THE SCREEN, SHE GREW ATTACHED TO YOUR ADVENTURE.
• SHE DESPERATELY WANTED TO BE A PART OF IT.
• SO SHE DECIDED TO INSERT HERSELF INTO YOUR STORY.
• SHE REACTIVATED PUZZLES. SHE DISABLED ELEVATORS. SHE ENLISTED ME TO TORMENT YOU.
• ALL SO SHE COULD SAVE YOU FROM DANGERS THAT DIDN'T EXIST.
• ALL SO YOU WOULD THINK SHE'S THE GREAT PERSON...
• THAT SHE'S NOT.
• AND NOW, IT'S TIME FOR HER FINEST HOUR.
• AT THIS VERY MOMENT, ALPHYS IS WAITING OUTSIDE THE ROOM.
• DURING OUR "BATTLE," SHE WILL INTERRUPT.
• SHE WILL PRETEND TO "DEACTIVATE" ME, "SAVING" YOU ONE FINAL TIME.
• FINALLY. SHE'LL BE THE HEROINE OF YOUR ADVENTURE.
• YOU'LL REGARD HER SO HIGHLY SHE'LL EVEN BE ABLE TO CONVINCE YOU NOT TO LEAVE.
• ... OR NOT.
• YOU SEE, I'VE HAD ENOUGH OF THIS PREDICTABLE CHARADE.
• I HAVE NO DESIRE TO HARM HUMANS. FAR FROM IT, ACTUALLY.
• MY ONLY DESIRE IS TO ENTERTAIN.
• AFTER ALL, THE AUDIENCE DESERVES A GOOD SHOW, DON'T THEY?
• AND WHAT'S A GOOD SHOW...
• WITHOUT A PLOT TWIST?
• [Alphys] H-hey!!! Wh-wh-what's going on!?
• [Alphys] Th-th-the door just locked itself!
• SORRY, FOLKS! THE OLD PROGRAM'S BEEN CANCELLED!!!
• BUT WE'VE GOT A FINALE THAT WILL DRIVE YOU WILD!!
• REAL DRAMA!! REAL ACTION!! REAL BLOODSHED!!
• ON OUR NEW SHOW...
• "ATTACK OF THE KILLER ROBOT!"
• [Refight Mettaton EX]
  • [Narrator] (Seems like you could skip Mettaton's monologue by turning him around now.)
  • [Narrator] (What will you do?)
  • [Skip]
    • [Narrator] (You told Mettaton there was something cool behind him.)
    • REALLY? WHERE?
    • CLEVER... VERY CLEVER.

Battle

Before transformation

• [Turn 1]
  • YES, I WAS THE ONE THAT RE-ARRANGED THE CORE!
  • I WAS THE ONE THAT HIRED EVERYONE TO KILL YOU!
  • THAT, HOWEVER, WAS A SHORT-SIGHTED PLAN.
  • YOU KNOW WHAT WOULD BE A HUNDRED TIMES BETTER?
  • KILLING YOU MYSELF!!
  • [If the protagonist fires at him]
    • THAT WORTHLESS PEASHOOTER WON'T WORK ON ME, DARLING.
    • DON'T YOU UNDERSTAND WHAT ACTING IS!?
• [Turn 2]
  • LISTEN, DARLING. I'VE SEEN YOU FIGHT.
  • YOU'RE WEAK.
  • IF YOU CONTINUE FORWARD, ASGORE WILL TAKE YOUR SOUL.
  • AND WITH YOUR SOUL, ASGORE WILL DESTROY HUMANITY.
• [Turn 3]
  • BUT IF I GET YOUR SOUL, I CAN STOP ASGORE'S PLAN!
  • I CAN SAVE HUMANITY FROM DESTRUCTION!
• [Turn 4]
  • THEN, USING YOUR SOUL, I'LL CROSS THROUGH THE BARRIER...
  • AND BECOME THE STAR I'VE ALWAYS DREAMED OF BEING!
  • HUNDREDS, THOUSANDS...
  • NO! MILLIONS OF HUMANS WILL WATCH ME!
• [Turn 5]
  • GLITZ! GLAMOUR! I'LL FINALLY HAVE IT ALL!
  • SO WHAT IF A FEW PEOPLE HAVE TO DIE?
  • THAT'S SHOW BUSINESS, BABY!
  • [Alphys] U..uh... I can't see what's going on in there, but...
  • [Alphys] D-d-don't give up, okay!?
  • [Alphys] Th... there's o-one l-l-last way to beat Mettaton...
  • [Alphys] It's... um... it's...
  • [Alphys] This is a work in-progress, so don't judge it too hard...
  • [Alphys] But, you know how Mettaton always faces f-f-forward?
  • [Alphys] That's because there's a switch on his backside.
  • [Alphys] S-s-so if y-y-you c-c-can turn him around... um...
  • [Alphys] And, umm... press th-th-th-the switch...
  • [Alphys] He'll be... um... He'll be...
  • [Alphys] Vulnerable.
  • [Alphys] Well, g-g-gotta go!
• THIS IS IT, DARLING! SAY GOODBYE! [Turn 6+]
• [Turn]
  • OH??? A MIRROR???
  • RIGHT, I HAVE TO LOOK PERFECT FOR OUR GRAND FINALE!
  • HMMM... I DON'T SEE IT... WHERE IS IT...?
  • DID YOU.
  • JUST FLIP.
  • MY SWITCH?

After transformation

• [Encounter]
  • 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!
• Lights! Camera! Action! [Turn 1]
• Drama! Romance! Bloodshed! [Turn 2]
• I'm the idol everyone craves! [Turn 3]
• Smile for the camera! [Turn 4]
• [Turn 5]
  • Oooh, it's time for a pop quiz!
  • I hope you brought a keyboard... [PC version]
    • Have fun with that on-screen keyboard... [Console version]
  • This one's an essay question!
  • [Narration] ESSAY PROMPT: What do you love most about Mettaton? (No X or Z) [PC version]
    • [Narration] ESSAY PROMPT: What do you love most about Mettaton? [Console version]
  • Speechless...? Who can blame you? [0 characters long]
  • Well... that's concise. [1 character long]
  • Beautiful. Sometimes the fewest words speak the loudest. [2-12 characters long]
  • Nice. You get a gold star. [13-49 characters long]
  • Oh my... what a great answer. [50-89 characters long]
  • [90-139 characters long]
    • Oooooh, you said so much about me...
    • I love how passionate you are.
    • ... even though I don't understand what you said...
  • Beautiful. Why don't you write a book? [140+ characters long]
  • Nice detail... You're right, I do look quite nice. [1 compliment word]
  • Wonderful! Amazing! A+... I AM completely stunning. [2 compliment words]
  • Oh, I'm blushing... You're completely right, I am beautiful in every way. [3 compliment words]
  • Oh my... I'm speechless... You've completely captured how beautiful I am. [4 compliment words]
  • That's right. Legs was the correct answer! [LEGS]
  • How creative. Arms... most people just think about my legs. [ARMS]
  • My hair... yes, I use metal hair gel. [HAIR]
  • Yes, my personality is quite charming, isn't it? [PERSONALITY]
  • [VOICE]
    • They say I have the voice of a Siren...
    • ... awooga!
  • Dancing...? Thank you, I'm self-taught. [DANCE/DANCING]
  • Huh? This essay is supposed to be about me, not about you... [Insult word]
  • What a touching confession! I'll add it to the pile. [I LOVE YOU/I LOVE YOUR]
  • Toby? What the hell is that? Sounds... sexy. [TOBY]
  • [Swear word]
    • Oh my! This is a family friendly TV show.
    • Now stand still while I murder you.
• [Turn 6]
  • Your essay really showed everyone your heart.
  • Why don't I show you mine?
• Ooooh, I'm just warming up! [Turn 7]
• But how are you on the dance floor!? [Turn 8]
• Can you keep up the pace!? [Turn 9]
• Lights! Camera Bombs! [Turn 10]
• Things are blowing up! [Turn 11]
• Time for our union-regulated break! [Turn 12]
• [Turn 13]
  • We've grown so distant, darling...
  • How about another heart-to-heart?
• [Turn 14]
  • A.. arms? Wh... who needs arms with legs like these?
  • I'm still going to win!
• Come on ...! [Turn 15]
• The show ... must go on! [Turn 16]
• Dr... Drama! A... Action! [Turn 17]
• [Turn 18]
  • L... lights... C... camera...
  • Enough of this! Do you really want humanity to perish!?
  • ... or do you just believe in yourself that much?
• [Turn 19]
  • Haha, how inspiring!
  • Well, darling! It's either me or you!
  • But I think we both already know who's going to win.
  • Witness the true power of humanity's star!
• [Turn 20]
  • ... then...
  • Are YOU the star?
  • Can you really protect humanity!?
• ... [Turn 21+]
• [Spared (Ratings)]
  • OOH, LOOK AT THESE RATINGS!!!
  • THIS IS THE MOST VIEWERS I'VE EVER HAD!!!
  • WE'VE REACHED THE VIEWER CALL-IN MILESTONE!
  • ONE LUCKY VIEWER WILL HAVE THE CHANCE TO TALK TO ME...
  • ... BEFORE I LEAVE THE UNDERGROUND FOREVER!!
  • LET'S SEE WHO CALLS IN FIRST!
  • HI, YOU'RE ON TV!
  • WHAT DO YOU HAVE TO SAY ON THIS, OUR LAST SHOW???
  • [Napstablook] .....
  • [Napstablook] oh........
  • [Napstablook] hi... mettaton...
  • [Napstablook] i really liked watching your show...
  • [Napstablook] my life is pretty boring... but...
  • [Napstablook] seeing you on the screen... brought excitement to my life... vicariously
  • [Napstablook] i can't tell, but... i guess this is the last episode...?
  • [Napstablook] i'll miss you... mettaton......
  • [Napstablook] ... oh.... i didn't mean to talk so long...
  • [Napstablook] oh..........
  • NO, WAIT! WAIT, BL...
  • H... THEY ALREADY HUNG UP.
  • ...
  • I'LL TAKE ANOTHER CALLER!!!
  • [Unknown callers] Mettaton, your show made us so happy!
  • [Unknown callers] Mettaton, I don't know what I'll watch without you.
  • [Unknown callers] Mettaton, there's a Mettaton-shaped hole in my Mettaton-shaped heart.
  • AH... I...
  • I SEE...
  • ...
  • EVERYONE... THANK YOU SO MUCH.
  • ...
  • DARLING.
  • PERHAPS... IT MIGHT BE BETTER IF I STAY HERE FOR A WHILE.
  • HUMANS ALREADY HAVE STARS AND IDOLS, BUT MONSTERS...
  • THEY ONLY HAVE ME.
  • IF I LEFT... THE UNDERGROUND WOULD LOSE ITS SPARK.
  • I'D LEAVE AN ACHING VOID THAT CAN NEVER BE FILLED.
  • SO... I THINK I'LL HAVE TO DELAY MY BIG DEBUT.
  • BESIDES.
  • YOU'VE PROVEN TO BE VERY STRONG.
  • PERHAPS... EVEN STRONG ENOUGH TO GET PAST ASGORE.
  • I'M SURE YOU'LL BE ABLE TO PROTECT HUMANITY.
  • HA, HA...
  • IT'S ALL FOR THE BEST, ANYWAY.
  • THE TRUTH IS, THIS FORM'S ENERGY CONSUMPTION IS...
  • INEFFICIENT.
  • IN A FEW MOMENTS, I'LL RUN OUT OF BATTERY POWER, AND...
  • WELL.
  • I'LL BE ALRIGHT.
  • KNOCK 'EM DEAD, DARLING.
  • AND EVERYONE... THANK YOU.
  • YOU'VE BEEN A GREAT AUDIENCE!
• [Defeat]
  • H.. ha...
  • So I was wrong.
  • Darling...
  • You really are strong enough to get past ASGORE.
  • Well then...
  • It's time for you to go.
  • Don't worry about me.
  • I might seem like I'm dying now, but...
  • Dr. Alphys can always repair me.
  • And... besides...
  • Even if I'm not cut out to be a star...
  • I still got to perform for a human, didn't I?
  • So, thank you, darling...
  • You've been a great audience!

Flavor text

Before transformation

• Seriously, his metal body is invulnerable! [Check]
• Mettaton attacks! [Encounter]
• Mettaton. [Neutral]
• This is probably what you'll do if things continue in this manner. [Burn]
• Seems like a good time to turn Mettaton around. [After Alphys calls]
• You tell Mettaton that there's a mirror behind him. [Turn]

After transformation

• His weak point is his heart-shaped core. [Check]
• Mettaton EX makes his premiere! [Encounter]
• Mettaton. [Neutral]
• Smells like Mettaton. [Neutral]
• MEttaton Rules the school. [Neutral, unused; removed altogether by version 1.001-4 (1.05 on PC)]
• Mettaton is A- OK . [Neutral, unused; removed altogether by version 1.001-4 (1.05 on PC)]
• No on e cares. [Neutral, unused; removed altogether by version 1.001-4 (1.05 on PC)]
• Mettaton is saving your essay for future use. [After Essay]
• [Boast]
  • You say you aren't going to get hit at ALL.
  • Ratings gradually increase during Mettaton's turn.
• You posed dramatically. The audience nods. [Pose]
  • Despite being hurt, you posed dramatically. The audience applauds. [Half HP or less]
  • Despite being wounded, you posed dramatically. The audience gasps. [Less than a quarter HP]
  • With the last of your power, you pose dramatically. The audience screams. [3 HP or less]
• [Heel Turn]
  • You turn and scoff at the audience.
  • They're rooting for your destruction this turn!
• You throw the stick. Mettaton catches it in his mouth and winks. [Using Stick]
• You eat the Glamburger. The audience loves the brand. [Using Glamburger]
• You eat the Starfait. The audience loves the brand. [Using Starfait]
• You eat the Junk Food. The audience is disgusted. [Using Junk Food]
• You used the Mystery Key. Mettaton pretends it isn't there. [Using Mystery Key]
• You ate the Face Steak. The audience goes nuts. [Using Face Steak]
• Mettaton has low HP. [Low HP]
• Monster seems satisfied. [Spare conditions met, unused; removed altogether by version 1.001-4 (1.05 on PC)]

Creation and development

Mettaton EX slightly resembles Bob Sparker from Tales from Electricopolis by Pauli Kohberger and was inspired by the character.

According to Toby Fox, the fight against Mettaton EX was the hardest one for him to design. There were many attack ideas that were never used, such as more tiny Mettaton robots, and disco dancing robots that threw stars. Mettaton EX originally saved images of all the essays to the computer's hard drive, but the feature was removed for being too buggy. Several unused sprites for Mettaton EX's head show his right eye, and what appears to be the machinery on his face.

In the 10th Anniversary Stream, Toby mentions that Clairvoire drew the "Happy Breaktime" graphic.

Gallery

• 
  Mettaton EX Poseable Figurine sold on Fangamer.
• 
  Mettaton's tarot card as Major Arcana XVII, "The Star".
• 
  The Anime Friends Button Set sold on Fangamer sells Pins with both of Mettaton's forms.
• 
  Artwork of Mettaton and Mad Mew Mew having a dance battle.

Trivia

• Mettaton's bombs behave virtually identically to the bombs in Hudson's 2D Bomberman games.
• 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 console versions.
• With 3-7 DF (such as from using the Faded Ribbon) it is possible to survive a standard attack while at 4 HP, but not when at 5 HP due to it dealing 2 more damage.

Version history

Version tag	Changes
v1.05 (PC) v1.001-4 (PS4/PSVita)	Unused version of Mettaton EX's pre-battle dialogue was removed.

References