1 - 20 of 21 Works by Rockium
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There is a little house in a little corner of Waterfall that Mettaton, King of the Underground, would love nothing more than to see gone.
That's what he tells himself, anyways.
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Because Mettaton wakes up, the surface now a dream come true, and the sun rises with him.
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cherish these few specks of time by Rockium
Fandoms: Undertale (Video Game), Everything Everywhere All at Once (2022)
04 Dec 2025
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"O-okay, fine! Fine! I'll tell you, just don't laugh," she surrenders, face flushing hot, "you know about alternate universes, right? I told you?"
"Of course." He leans forward.
"W-well, there's got to be some universal constants across most universes, right? So, uh, I was just wondering..." and her voice softens into a pink shade of shy, "do you think we would be friends? In every universe?"
(Or: Alphys and Mettaton, across timelines and lifetimes and universes.)
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Ghost monsters don’t have daemons — that is, until they become corporeal.
Napstablook doesn’t know this, when they end up trapped in Mettaton’s dead body.
Neither does their daemon.
Series
- Part 1 of a different side of me
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In a timeline where no one may grow up under the sun, Dess sneaks Noelle out to Waterfall.
(Or: the kids have one good day.)
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So: he has time off. Time off means he is not performing. Time off means he has to do something else, and unfortunately, he’d already made the calls and set the schedules for his future plans within the first two hours of his free time, so.
(Time off means time to think. Time to think means time for his mind to wander.)
(It always wanders home.)
In which the ghost cousins are alone. Old habits, of course, are always there to remind them of a time they were not.
(Written for the Ghost Cousins zine.)
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“Mrow,” says the cat, pinning them with two startlingly bright green eyes.
Napstablook stares at the cat.
The cat stares at them.
They stare back.
And bored with the inadvertent staring competition, the cat does a little stretch and pads right over to them to properly introduce itself, rubbing up against their knees.
In which Napstablook adopts a cat. Or, more specifically, the cat adopts them. Shenanigans ensue.
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(mama never really learned how to live by herself) by Rockium
Fandoms: Digimon - All Media Types
17 Feb 2023
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Long before the creation of Eosmon and Neverland, long before she received academic acclaim, long before she grew up — Menoa Bellucci was simply an extraordinary little girl, and Morphomon was simply her best friend.
Or: Menoa makes a friend, copes with the double-edged sword of being a gifted child, grows up too fast, and takes loss very, very badly.
(Written for the FanFiction Library's 2023 Febuwhump challenge, day 17: broken.)
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so pick up your pieces (even if some scars never fade) by Rockium
Fandoms: Undertale (Video Game)
03 Oct 2022
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Often, grief is a lot more than a five-step process. Sometimes it’s a cycle. Sometimes it’s being stuck at the same stage for months or years on end. Sometimes there’s respite, because more often than not, life isn’t solely about lingering in depression.
Sometimes things get better, and sometimes they get worse.
Maybe that’s true even if you feel like your world’s already ended.
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Or, a collection of miscellaneous oneshots and other things set in Entity NEO (and sometimes only tangentially related), because none of this wack shit is canon, so I do as I please. <3
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In the time between first seeing the genocidal human and the final act of the day, Mettaton is waiting.
Maybe it's for the end. Maybe he doesn't want to dwell on it.
He's not alone in waiting, at least.
(Of Mettaton and Alphys being friends, right before the end of all things.)
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It’s not who you are — not anymore — but the fact still stands: there’s a reason why you’re called ghosts, you know?
You come back.
In which a little ghost from Waterfall gets the chance to live again — a lot more than once.
(Written for Mettamay’s day 11 prompt: new life.)
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By all accounts, it had been a totally normal day, up to the point when you heard a knocking on your door, and found that letter pinned to it.
That’s when everything pretty much went downhill. Your world crashing down upon you. The harshness of a new, bitter reality. All that fancy terminology doesn’t really help matters, though - you’re still trapped in his metal corpse, and all you want to do now is find a way home.
First things first, though...how do you even begin to walk?
(A second-person retelling of Entity NEO, an Undertale Napstablook-centric fancomic, from the POV of...well, guess who.)
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Of two kids, the underground civilization they left in shambles, and the choices they can and cannot make.
(An interpretation of Chara, Frisk, and their actions in the fancomic Entity NEO.)
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Gone to the Ruins for a walk, you write, and your brow furrows as you attempt to estimate how long you’ll be out. How would you know? Time flies by all too quickly. Should be back before 9.
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Look. When you’re a traumatized ghostbot with nothing but a music player and the whole gamut of Issues™ for company, you gotta get your kicks from somewhere, right?
Or, Napstablook goes for a walk. Of sorts.
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The sharp scent of disinfectant is the first thing that hits you upon awakening. The bright, glaring hospital lights the second, and the mop of slightly disheveled pink hair resting by your bedside the third.
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Angiogenesis - the development of new blood vessels. Blood is thicker than water, leaving its memory even long after it is washed away.
Or, Max Haltmann survives the ending of Planet Robobot.
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You guarded the silence, and silence was kept.
That was how it had been, at least.
(A second-POV fic from the perspective of Shriek.)
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With only so much time left, Mettaton finds himself urgently pursuing one last errand - sending a letter. Trying to make amends. It’s definitely not enough, but it’s the most he can do right now.
(A third-person perspective retelling of chapter 1 of Entity NEO, an Undertale Napstablook-centric fancomic.)
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Explore Mount Ebott, they said. It’ll be fun, they said. It’s not so fun once you trip down a hole and wind up in a fantasyland that’s deathly afraid of your kind, but you’ve run cross-country before. Surely you’ll be able to find a way out of this mountain before anyone notices, right?...
(A mostly second-person retelling of chapters 11 and 12 of Entity NEO, an Undertale Napstablook-centric fancomic.)
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i’m gonna make sure your loved ones never find you by Rockium
Fandoms: Undertale (Video Game)
16 Dec 2020
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It’s been two months since your boyfriend has gone missing down the mountain, and so far the search parties have made minimal progress.
You can’t take this agony any longer. If the search parties can’t find him, you’ll find him yourself.
Doesn’t mean that you’ll like what you discover, though.
(A second-person retelling of chapter 22 of Entity NEO, an Undertale Napstablook-centric fancomic.)
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Silk and Stars by Rockium
Fandoms: Hoshi no Kaabii | Kirby: Right Back at Ya!, Hollow Knight (Video Game)
05 Oct 2019
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The Infection has been purged, and Hallownest slowly starts to rebuild itself.
In other news, a spider gets spirited away by weird clock magic to another dimension, more at 11.