This has fanart if it, one of which is the cover of this story. It's hilarious given the characters, in my opinion.
Deranged Flower
INT. JUDGEMENT HALL - AFTERNOON
Murderous killer ANGEL OF DEATH CHARA DREEMURR is arguing with punny waitress FALLEN CHILD FRISK DREEMURR. CHARA tries to hug FRISK but she shakes her off.
CHARA
Please Frisk, don't leave me.
FRISK
I'm sorry Chara, but I'm looking for somebody a bit more brave. Somebody who faces her fears head on, instead of running away.
CHARA
I am such a person!
FRISK frowns.
FRISK
I'm sorry, Chara. I just don't feel excited by this relationship anymore.
FRISK leaves.
CHARA sits down, looking defeated.
Moments later, kind sentry SANS UNDERTALE barges in looking flustered.
CHARA
Goodness, Sans! Is everything okay?
SANS
I'm afraid not.
CHARA
What is it? Don't keep me in suspense...
SANS
It's ... a flower ... I saw an evil flower kill a bunch of monsters!
CHARA
Defenseless monsters?
SANS
Yes, defenseless monsters!
CHARA
Bloomin' heck, Sans! We've got to do something.
SANS
I agree, but I wouldn't know where to start.
CHARA
You can start by telling me where this happened.
SANS
I was...
SANS fans himself and begins to wheeze.
CHARA
Focus Sans, focus! Where did it happen?
SANS
My house! That's right - My house!
CHARA springs up and begins to run.
EXT. A ROAD - CONTINUOUS
CHARA rushes along the street, followed by SANS. They take a short cut through some back gardens, jumping fences along the way.
INT. SANS'S HOUSE - SHORTLY AFTER
FLOWEY FLOWER a deranged flower terrorises two monsters.
CHARA, closely followed by SANS, rushes towards FLOWEY, but suddenly stops in her tracks.
SANS
What is is? What's the matter?
CHARA
That's not just any old flower, that's Flowey Flower!
SANS
Who's Flowey Flower?
CHARA
Who's Flowey Flower? Who's Flowey Flower? Only the most deranged flower in the universe!
SANS
Blinkin' knickers, Chara! We're going to need some help if we're going to stop the most deranged flower in the universe!
CHARA
You can say that again.
SANS
Blinkin' knickers, Chara! We're going to need some help if we're going to stop the most deranged flower in the universe!
CHARA
I'm going to need knives, lots of knives.
Flowey turns and sees Chara and Sans. He grins an evil grin.
FLOWEY
Chara Dreemurr, we meet again.
SANS
You've met?
CHARA
Yes. It was a long, long time ago...
EXT. A PARK - BACK IN TIME
A young CHARA is sitting in a park listening to some future funk music, when suddenly a dark shadow casts over her.
She looks up and sees FLOWEY. She takes off her headphones.
FLOWEY
Would you like some chocolate?
CHARA's eyes light up, but then he studies FLOWEY more closely, and looks uneasy.
CHARA
I don't know, you look kind of deranged.
FLOWEY
Me? No. I'm not deranged. I'm the least deranged flower in the world.
CHARA
Wait, you're a flower?
CHARA runs away, screaming.
INT. SANS'S HOUSE - PRESENT DAY
FLOWEY
You were a coward then, and you are a coward now.
SANS
(To CHARA) You ran away?
CHARA
(To SANS) I was a young child. What was I supposed to do?
CHARA turns to FLOWEY.
CHARA
I may have run away from you then, but I won't run away this time!
CHARA runs away.
She turns back and shouts.
CHARA
I mean, I am running away, but I'll be back - with knives.
FLOWEY
I'm not scared of you.
CHARA
You should be.
EXT. SNOWDIN - LATER THAT DAY
CHARA and SANS walk around searching for something.
CHARA
I feel sure I left my knives somewhere around here.
SANS
Are you sure? It does seem like an odd place to keep deadly knives.
CHARA
You know nothing Sans Undertale.
SANS
We've been searching for ages. I really don't think they're here.
Suddenly, FLOWEY appears, holding a pair of knives.
FLOWEY
Looking for something?
SANS
Crikey, Chara, he's got your knives.
CHARA
Tell me something I don't already know!
SANS
The earth's circumference at the equator is about 40,075 km.
CHARA
I know that already!
SANS
My mom gay.
FLOWEY
(appalled) Dude!
While FLOWEY is looking at SANS with disgust, CHARA lunges forward and grabs her deadly knives. He wields them, triumphantly.
CHARA
Prepare to die, you deranged carrot!
FLOWEY
No please! All I did was kill a bunch of monsters!
FRISK enters, unseen by any of the others.
CHARA
I cannot tolerate that kind of behaviour! Those monsters were defenceless! Well now they have a defender - and that's me! Chara Dreemurr, defender of innocent monsters.
FLOWEY
Don't hurt me! Please!
CHARA
Give me one good reason why I shouldn't use these knives on you right away!
FLOWEY
Because Chara, I am your brother.
CHARA looks stunned for a few moments, but then collects herself.
CHARA
No you're not, at least not by blood!
FLOWEY
Ah well, it had to be worth a try.
FLOWEY tries to grab the knives but CHARA dodges out of the way.
CHARA
Who's the brother now? Huh? Huh?
Unexpectedly, FLOWEY slumps to the ground.
SANS
Did he just faint?
CHARA
I think so. Well that's disappointing. I was rather hoping for a more dramatic conclusion, involving my deadly knives.
CHARA crouches over FLOWEY's body.
SANS
Be careful, Chara. It could be a trick.
CHARA
No, it's not a trick. It appears that... It would seem... Flowey Flower is dead!
CHARA
What?
CHARA
Yes, it appears that I scared him to death.
SANS claps his hands.
SANS
So your knives did save the day, after all.
FRISK steps forward.
FRISK
Is it true? Did you kill the deranged flower?
CHARA
Frisk how long have you been...?
FRISK puts her arm around CHARA.
FRISK
Long enough.
CHARA
Then you saw it for yourself. I killed Flowey Flower.
FRISK
Then the monsters are safe?
CHARA
It does seem that way!
A crowd of vulnerable monsters enter, looking relived.
FRISK
You are their hero.
The monsters bow to CHARA.
CHARA
There is no need to bow to me. I seek no worship. The knowledge that Flowey Flower will never kill monsters ever again, is enough for me.
FRISK
You are humble as well as brave!
One of the monsters passes CHARA a heart-shaped locket
FRISK
I think they want you to have it, as a symbol of their gratitude.
CHARA
I couldn't possibly.
Pause.
CHARA
Well, if you insist.
CHARA takes the locket.
CHARA
Thank you.
The monsters bow their heads once more, and leave.
CHARA turns to FRISK.
CHARA
Does this mean you want me back?
FRISK
Oh, Chara, of course I want you back!
CHARA smiles for a few seconds, but then looks defiant.
CHARA
Well you can't have me.
FRISK
WHAT?
CHARA
You had no faith in me. You had to see my scare a flower to death before you would believe in me. I don't want a lover like that.
FRISK
But...
CHARA
Please leave. I want to spend time with the one person who stayed with me through thick and thin - my best friend, Sans.
SANS grins.
FRISK
But...
SANS
You heard the lady. Now be off with you. Skidaddle! Shoo!
FRISK
Chara?
CHARA
I'm sorry Frisk, but I think you should skidaddle.
FRISK leaves.
SANS turns to CHARA.
SANS
Did you mean that? You know ... that I'm your best friend?
CHARA
Of course you are!
The two walk off arm in arm.
Suddenly SANS stops.
SANS
When I said My mom gay, you know I was just trying to distract the flower don't you?