"Yo fam where the shit am I?", Greg asked Flowey.
"You're in the Underground! Golly, you must be new around here!", said Flowey.
"Jeez fucking flower who the hell says 'golly' that's fucking gay.", said Greg.
"Down here, you need LV to survive. That means love!", said Flowey, "I'll give you some LOVE!".
"Eww wtf that's gay you what the fuck is wrong with you.", asked Greg.
Flowey shot "friendliness pellets" at Greg, but he dodged like the savage he is.
"Hey buddy, you missed them.", said Flowey, "WALK INTO THE BULLETS- er, I mean 'friendliness pellets'.".
"Wait fam, are you trying to kill me?", asked Greg.
"YES YOU FUCKING IDIOT!", shouted Flowey.
Flowey surrounded Greg with a circle of bullets.
"NOW GET FUCKING DUNKED ON!", screamed Flowey.
Suddenly Flowey was torched by some fire shot by Toriel.
"Do not be afraid my child.", said Toriel, "My na-".
"WTF is wrong with you fam don't call me your child.", said Greg.
"Do not use such language while talking to me.", said Toriel.
Greg looked at Toriel's dress.
"What fucking team is that? Is that the Alpha Insignia or whatever the fuck it's called?", asked Greg.
"Do not say such things.", ordered Toriel.
"I'm tired of your fucking shit bitch.", said Greg.
Greg pulled out his pistol and shot Toriel to death.
Greg went through the Underground killing everything until he came face-to-face with an invincible opponent.
"You cannot kill me, you cannot hurt me!", declared the Beyond Enraged Dummy, "You cannot stab me or freeze me or burn me!".
"UGH SHUT THE FUCK UP YOU FUCKING SHITLORD!", shouted Greg.
"You're making me even more mad!", shouted the Even More Beyond Enraged Dummy.
"Wait fam wanna join my clan.", asked Greg.
"What's your clan name?", asked the Even More Beyond Enraged Dummy.
"It's called the 'Alligator Pajamas'.", said Greg.
"Well, fuck yeah then!", said the Mad Dummy who was no longer even more beyond enraged.
Greg and the Mad Dummy continued to slay the underground until they came across some spider bitch.
"Well now, just relax! Why don't you come closer to me?", sung Muffet, "I'll just dry your veins as I enjoy my cup of tea!".
"Stop fucking singing fam.", said Greg.
"Yeah, it's making me so mad!", said the Super Extremely Fucking Pissed Beyond All Comprehension And Completely Batshit Enraged Dummy.
Suddenly So Sorry bursted into the room.
"Oh shit, I'm in the wrong place!", said Bing Bong oh sorry I meant So Sorry oh shit I just noticed.
"Ahuhuhuhuhu, who is this?", asked Muffet, "He's kind of cute...".
"Umm, what?", asked Bing Bong shit I did it again.
Suddenly the spiders picked up So Bing Bong Sorry and tossed him towards Muffet.
"Ahuhuhuhuhu, you two can go.", said Muffet.
"Ahh, young love. Let's get out of here.", said the Mad Dummy.
Greg and Mad Dummy continued their quest until they met Sans.
"you killed everyone but muffet and bing bong.", said Sans.
"Get out of our way fam before we wreck you.", said Greg.
"heh, kid. you must really wanna have a bad time.", said Sans.
Sans sent out an uncountable amount of Gaster Blasters and fired them at Greg and the Mad Dummy. Greg died instantly.
"YOU KILLED MY FUCKING PARTNER YOU GODDAMN SHITHEAD GO TO FUCKING HELL!", said the Uncomprehensively Ultra Mega Super Laserdeath Pissed And Also Extremely Colossally Ultimately Gigantically Fucking Enraged Dummy.
"wha-what? how are you alive?", asked Sans.
"I AM A GHOST INSIDE A DUMMY! MY COUSIN WAS IN A DUMMY TOO UNTIL MY PARTNER SHOWED UP!", said the Uncomprehensively Ultra Mega Super Laserdeath Pissed And Also Extremely Colossally Ultimately Gigantically Fucking Enraged Dummy.
The Uncomprehensively Ultra Mega Super Laserdeath Pissed And Also Extremely Colossally Ultimately Gigantically Fucking Enraged Dummy then sent out his Dummy Bots and had them attack Sans, but Sans Dodged. However, Dummy Bots shoot homing missles so they went back to Sans, but he dodged again and the missiles hit the Uncomprehensively Ultra Mega Super Laserdeath Pissed And Also Extremely Colossally Ultimately Gigantically Fucking Enraged Dummy. Uncomprehensively Ultra Mega Super Laserdeath Pissed And Also Extremely Colossally Ultimately Gigantically Fucking Enraged Dummy then used the Pokemon move Swift. Sans tried dodging, but the stars kept going after him because Swift can't miss. Eventually Sans died.
"papyrus, do you want anything?", asked Sans.
"FUCK NO FAM GRILLBYS SUCKS", responded Papyrus' ghost.
The End.