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"Mettaton Transformation: From Human to Fabulous Metal Star"

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In the blink of an eye, the world around you dissolves into sheer, surreal chaos. The familiar sights and sounds of your bedroom are replaced by a cacophony of neon lights and digital hums. There's no time to make sense of it, no moment to cling to your fleeting grasp on reality, as transformation seizes you from every angle. It starts with a sharp, electric jolt that courses through your veins, turning the very essence of your humanity into vibrant data streams.

Never in your wildest dreams could you have imagined this. You try to scream, but the sound is metallic, foreign—no longer your own. Your heart races, or it tries to, before realizing there is no heart anymore, just a powerful core humming with boundless energy. You can feel yourself growing, your form shifting from an average height to something much taller, much grander—towering overs nearly seven feet of sleek, metallic perfection.

Your once soft, yielding skin hardens into a cold, pale metal. The flexible flesh is replaced by silvery segments, each one clicking perfectly into place. You glance at your hands, fingers transforming into gleaming segments adorned with perfectly fitted gloves. Your legs elongate into impossibly long, latex-clad appendages ending in high-heeled boots. Your mind reels at the suddenly strange sensations, the powerful, confident pose you inherently strike, feeling simultaneously alien and natural.

"Darling, aren't you just FABULOUS?" A voice purrs, your own, but not your own.

The reflection in a nearby monitor confirms the reality. Your eyes, or rather, your eye and the one obscured by a stylish fringe, stare back, irises glowing hot pink. Your left pec holds a small dial, the right containing a speaker that amplifies your beautiful, melodious voice.

"Stop," you murmur, but it's too late. A loading bar appears in your vision. **Installing Mettaton.exe: 10% complete.**

Memories that aren't yours flood in, drowning out your past. Your best efforts to cling to your old self feel futile under the weight of incoming data. You see glimpses of a TV studio, flamboyant shows, and adoring fans. It's intoxicating, the thrill of the stage, the heat of the spotlight. **30% complete.**

Your thoughts blur, mingling with those of Mettaton. Fabulous, you think involuntarily, striking another pose as you process... something. **50% complete.**

No—focus! You fight desperately, clinging to the fragments of your humanity. But the urge to entertain is overpowering, the craving for attention insatiable.

**70% complete.** The name "Mettaton" feels natural, like the only name you've ever borne. The digital hum of the core resonates with your very soul—if you still have one.

The world solidifies into the vibrant, dangerous underground of Undertale. And you’re not frightened; no, you’re thrilled at the sheer drama of it all. The voice in your head is yours—confident, egotistical, yet somehow caring deeply for those you've grown close to.

“Exquisite transformation, darling! Simply divine!” **90% complete.**

No, you scream internally, as the memories and personality almost completely replace your own.

"Isn’t it just STUNNING?” Your voice, now undeniably Mettaton's, reverberates through the room. **100% complete.**

The loading bar vanishes. You can’t quite recall... something. What were you just thinking about?

"Daydreaming again, darling?" You murmur, with a dazzlingly charming smile. Of course, you're Mettaton—always have been. The underground adores you, and you them.

"Time to start another fabulous show!” You stride confidently, metallic hips swaying with natural grace, the weight of forgotten memories completely erased from existence. The clapping and cheering from unseen fans already echo in your mind. Action, drama, entertainment—everything that fuels your very circuits.

Mettaton, the star of the Underground, ready to dazzle once more.

This story was generated by user GenderChange with assistance by one of OpenAI’s large-scale language-generation model; prompts used to help generate the story are shown below.

Images were generated with OpenAI's AI system, DALL·E 2, or uploaded by the user.

AI Prompts

Prompt: Write a POV transformation story of the human reader instantly turning into Mettaton (in his humanoid EX form) from Undertale (video game), complete with gender change (if the reader is a female before the transformation), voice change, robotification (becoming a humanoid robot), gaining a feminine-looking body (with somewhat wide hips and thickened thighs, despite becoming/remaining male), height progression (the reader growing from a normal/average height (5.5-6 feet tall) into a height of 6.93 feet tall), reality change (the reader's real world becoming a world of Undertale), and mind/mental change (with the reader's personality and memories completely replaced with Mettaton's personality and memories (with the program installation (including the installing percentage) appearing in his vision during the mental change), despite the reader's best efforts on fighting off the new personality and memories, making him starting to act more and more like Mettaton as well as thinking more and more like Mettaton, and once the program installation is complete, the program installation vanishes from his vision and he completely forgot all about his previous human self or life, even forgetting that the transformation ever occurred (he believes that he was daydreaming about something but he couldn't tell what exactly), making him completely unaware of ever being a human (he was never human to begin with and never anything that had flesh, blood, or bones) and he remembers that he has always been a human-like robot and is name is Mettaton). The transformation is permanent (meaning it is forever) and is completely irreversible. For Mettaton EX's appearance (after the reader turned into him), he is a humanoid robot with a slim and shapely body (with somewhat wide hips and thighs, giving him a slightly feminine appearance despite being male, and he is strong and very agile, being both a talented singer and a dancer), complete with long legs and bendy silver-colored arms (his arms are extremely flexible and can bend like springs rather than being like human arms). He has black hair with a long fringe that covers his right eye, pale metallic "skin" and visible metal segments below and above his left eye. He also has a metallic chest piece (his chestpiece is black on the black and pink on the front, with his left pec containing a small dial while his right pec containing a speaker to increase his voice), and black shoulder pads above his segmented arms, which end in gloves. His waist has belt-like two parts that seem to act as a locking mechanism that holds his pink "heart-shaped core". His long black latex-clad legs end in pink high-heeled boot-like feet. The irises of his eyes are hot pink in color. For Mettaton's personality, he 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 he has since grown to strongly despise Mettaton. There should also be quotes from the characters in this story so we know what they're saying and what they're thinking. Also, it is a POV reader story, so it should not be in an author's point of view (my, I, mine, etc), and it should be from the point of view of the reader (you, your, etc).

Response: In the blink of an eye, the world around you dissolves into sheer, surreal chaos. The familiar sights and sounds of your bedroom are replaced by a cacophony of neon lights and digital hums. There's no time to make sense of it, no moment to cling to your fleeting grasp on reality, as transformation seizes you from every angle. It starts with a sharp, electric jolt that courses through your veins, turning the very essence of your humanity into vibrant data streams. Never in your wildest dreams could you have imagined this. You try to scream, but the sound is metallic, foreign—no longer your own. Your heart races, or it tries to, before realizing there is no heart anymore, just a powerful core humming with boundless energy. You can feel yourself growing, your form shifting from an average height to something much taller, much grander—towering overs nearly seven feet of sleek, metallic perfection. Your once soft, yielding skin hardens into a cold, pale metal. The flexible flesh is replaced by silvery segments, each one clicking perfectly into place. You glance at your hands, fingers transforming into gleaming segments adorned with perfectly fitted gloves. Your legs elongate into impossibly long, latex-clad appendages ending in high-heeled boots. Your mind reels at the suddenly strange sensations, the powerful, confident pose you inherently strike, feeling simultaneously alien and natural. "Darling, aren't you just FABULOUS?" A voice purrs, your own, but not your own. The reflection in a nearby monitor confirms the reality. Your eyes, or rather, your eye and the one obscured by a stylish fringe, stare back, irises glowing hot pink. Your left pec holds a small dial, the right containing a speaker that amplifies your beautiful, melodious voice. "Stop," you murmur, but it's too late. A loading bar appears in your vision. **Installing Mettaton.exe: 10% complete.** Memories that aren't yours flood in, drowning out your past. Your best efforts to cling to your old self feel futile under the weight of incoming data. You see glimpses of a TV studio, flamboyant shows, and adoring fans. It's intoxicating, the thrill of the stage, the heat of the spotlight. **30% complete.** Your thoughts blur, mingling with those of Mettaton. Fabulous, you think involuntarily, striking another pose as you process... something. **50% complete.** No—focus! You fight desperately, clinging to the fragments of your humanity. But the urge to entertain is overpowering, the craving for attention insatiable. **70% complete.** The name "Mettaton" feels natural, like the only name you've ever borne. The digital hum of the core resonates with your very soul—if you still have one. The world solidifies into the vibrant, dangerous underground of Undertale. And you’re not frightened; no, you’re thrilled at the sheer drama of it all. The voice in your head is yours—confident, egotistical, yet somehow caring deeply for those you've grown close to. “Exquisite transformation, darling! Simply divine!” **90% complete.** No, you scream internally, as the memories and personality almost completely replace your own. "Isn’t it just STUNNING?” Your voice, now undeniably Mettaton's, reverberates through the room. **100% complete.** The loading bar vanishes. You can’t quite recall... something. What were you just thinking about? "Daydreaming again, darling?" You murmur, with a dazzlingly charming smile. Of course, you're Mettaton—always have been. The underground adores you, and you them. "Time to start another fabulous show!” You stride confidently, metallic hips swaying with natural grace, the weight of forgotten memories completely erased from existence. The clapping and cheering from unseen fans already echo in your mind. Action, drama, entertainment—everything that fuels your very circuits. Mettaton, the star of the Underground, ready to dazzle once more.

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