Based on MLP Episode Return of the harmony.
There was a statue on the Underground, on Hotland.
The statue was a fairy with wings of moth, tail of a wolf, ears of a cheetah, face of a grizzly bear, dinosaur legs, and arms of a lizard, and a beak of a eagle with a black color on it, and a white hair with yellow that made it looks like a cockatoo. It had deer antlers. The name of the fairy was Lyzairooye Ditzia Hazelnutty. It wore a necklace with a ruby on it.
The statue slowly began to crack.
The monsters were at the park, playing volleyball.
Suddenly, coloured clouds came and it started to fall purple raindrops from it.
"Grape?" Natasha said.
Creatures came chasing a giant apple that had legs and was running away from them.
"What was that?" Isadora said.
"This Underground is sooo weird today." Undyne said.
"That was nothing." Mettaton said.
"Really, you piece of junk?" Papyrus said.
"Yes! And I'm not a junk!" Mettatton said.
"I wonder what is going on..." Sans said.
"Guys, King Asgore said that he want to talk with everyone on the Underground!" Alphys said.
Everyone was in front of the castle.
"I want you all to follow me." Asgore said.
Everyone followed the king.
There was a necklace on the ground and some pieces of rock.
"Lyzairooye is freed now and we have to stop her. She already changed the weather." Asgore said.
"Who is Lyzairooye?" Kris asked.
"The demon of the chaos. You have to found the 6 Powergems. They all have shapes of stars." Asgore said.
"Yeah, right. Only if you catch me!" A female voice said.
"Show yourself, Lyzairooye!" Asgore yelled.
"Blah, blah, blah. If you want the Powergems, you have to go to the forest maze and try to found them!" Lyzairooye said.
At the instant, the king and a lot of creatures were caught and put in cages made of tree branches.
Everyone was at the forest maze.
When Sans used his magic to use one of his bones as a spear to defend himself, his powers disappeared.
"The rule is no using powers or flying." Lyzairooye said.
Natasha was trying to found the Powergems.
"Natasha, did you know that being honest sometimes can end your friendship forever?" Lyzairooye said.
"No..." Natasha said.
"The truth cannot be pleasant." Lyzairooye said.
Lyzairooye appeared and hypnotized the fox girl.
"Natasha, who you were talking to? I heard some voices along with you." Papyrus said.
"None of your business!" Natasha shouted.
Papyrus stared at Natasha for some seconds.
Isadora was next to a lagoon.
"Isadora, your friends laugh at you everytime, right?" Lyzairooye said.
"They laugh with me, not at me." Isadora said.
"But, if they are humiliating you and making fun of you and are hiding it from you? Do you like being bullied by someone?" Lyzairooye said.
"No..." Isadora said.
Lyzairooye then hypnotized Isadora.
"Isadora! I am so happy that I finally found ya!" Papyrus said.
"WHY?! YOU WANT TO MOCK ME AGAIN LIKE THE OTHERS?!" Isadora shouted.
"Okay, what's going on here?" Papyrus said.
"Don't ask me." Natasha said.
Toriel was trying to find the Powergems.
"Poor Toriel, you must have been having a bad life since you lost your two kids, correct?" Lyzairooye said.
"I'm not going to answer you." Toriel said.
Toriel suddenly got hypnotized.
"It's time to know that you can't trust the people here." Lyzairooye said.
Frisk was scared.
"And you, little girl? Monsters are evil creatures, you should kill them all. There is no good creatures here, they are all evil, they are demons." Lyzairooye said.
Frisk got hypnotized.
"Kill everyone, my darling." Lyzairooye said.
Frisk grabbed a knife that fell next to her.
"Frisk, no!" Kris shouted.
"And you three, Undyne, Sans and Alphys. Alphys, everyone will think you are a idiotic shy girl. You need to get rid off this and turn into a better person, you should make a new invention, only for you. And you, Miss Undyne, being a coward is better than being brave. And you Sans, being lazy and doing nothing it's waaaay better than helping those liars. Even your so called 'brother'." Lyzairooye said.
Lyzairooye hypnotized everyone, except for Kris.
Papyrus appeared.
"Guys, what happened?" Papyrus shouted.
"The game ended now. You didn't find the Powergems." Lyzairooye said.
"Oh no..." Papyrus thought.
"Let's just get the fuck outta here, I wanna rest now." Alphys said.
"Go in the front, I will stay here." Sans said, yawning and sleeping.
Kris picked up Sans and carried him.
Frisk tried to kill Toriel.
"HIYAH!" Toriel shouted trying to punch Frisk but failing.
Natasha was teasing Isadora.
"You asshole. Can't even be beautiful like me." Natasha said.
"SHUT UP!" Isadora yelled.
"Only if I want." Natasha said.
"Say another word, and I will rip off your head from your neck!" Isadora yelled.
"Wait, maybe I know where the Powergems are! I think they are on the Diamondina Cave!" Papyrus thought.
Everyone was at the cave.
"Guys, help me found the gems!" Papyrus shouted.
"Okay, mister." Natasha said, and she punched Papyrus on the stomach.
"Why you did that, Natasha?!" Papyrus shouted furiously.
"I don't know." Natasha lied.
When Papyrus find the Powergems, Isadora stole the gems and passed to Natasha.
"Give me the Powergems!" Papyrus shouted.
Natasha gave the gems for Toriel, and she gave the gems to Alphys, and she gave the gems to Undyne.
"GIVE ME THE GEMS BACK!" Papyrus snapped.
"Fine, if you want this trash, take it with you." Natasha said, throwing tossing the gems on the air, and Papyrus quickly catched them with his mittens.
"So, I need to know how to use them to end with Lyzairooye." Papyrus said.
Everyone stared at him.
"Are you going to help me or not?" Papyrus yelled.
"NO!!!" Everyone shouted.
"You have legs, so use them to walk! Geez, it's so hard for you to move?!" Undyne said.
"SHUT UP! IF YOU ARE NOT GONNA HELP ME, I'M GOING TO SEARCH FOR A BOOK ALL BY MYSELF!" Papyrus shouted.
Papyrus was on the library when he found a red book with golden letters written on it.
'All about Powergems'
Papyrus searched for a page how to end with evil demons on the book.
'How to end with evil demons'
"Step 1: Use sugar, sodium and grass. Put some golden glitter from a Tangeorange Citrus inside of it."
"Step 2: Mix it using a spoon."
"Step 3: Put the drink on a jar and break the jar in the front of the creature."
"Okay..." Papyrus said, confused.
"The only place I can find tangeoranges with glitter is on the Bittersweet Acres.
Papyrus tried to do what was on the book, but failed.
"Why it didn't work?" Papyrus said.
"BECAUSE YOU ARE THE WORST PERSON ON THIS FUCKING WORLD!" Isadora yelled.
"ISADORA, SHUT UP!" Papyrus shouted.
"I'm outta here." Undyne said, walking away from the cave.
"Me too." Sans said, yawning.
"If you tell me to shut up again, I'll rip your legs off, okay?!" Isadora warned.
"Bye." Toriel said.
Frisk threw her knife on the ground and it fell on the ground.
"If you touch me, I'll kill you." Frisk said.
"Kris, tie up Frisk, PLEASE!" Papyrus said, scared.
"Why-" Kris said, but got interrupted by Papyrus.
"JUST DO IT!" Papyrus demanded.
"AND YOU, WITH FRIENDS LIKE YOU WHO NEEDS ENEMIES?!" Papyrus yelled.
Papyrus walked on the forest, thinking of what to do to stop Lyzairooye.
When Papyrus stopped, his hands started to glow, showing a pink aura coming from them.
"I don't know what this is, but I better try in one of the monsters to test in one of them only to see if they are gonna turn on their normal selves again!" Papyrus said, running.
Papyrus saw Alphys, who was creating a snowman with mud.
Papyrus tackled her and put his hands on her head.
"Remember who you are..." Papyrus thought.
Alphys opened her eyes.
"W-what happened to me?" Alphys asked.
"No time to explain right now, we have to get the others back to normal!" Papyrus said.
The two were walking at their way to Waterfall. Doggo, Dogamy and Dogaressa were protecting themselves from a tomato juice rain with a giant leaf as a umbrella.
"Natasha! Isadora!" Papyrus called.
The two tried to attack Papyrus, but he caught the two using his telekinesis.
Papyrus turned the two back to normal.
"Ooooh, what happened?" Natasha said.
"Everything is spinning..." Isadora said.
"I'll explain later. We have to save Toriel and Frisk now! Lyzairooye is messing with the Underground and with their heads!" Papyrus said.
Papyrus was holding Frisk on the ground while Isadora was hplding Toriel. He used the magic to turn them back to normal. Later, he turned Undyne to his normal self again.
"I can't believe I was thinking that a snowman was my greatest invention of the whole Underground!" Alphys angrily said.
"We have only one monster to catch now, guys." Papyrus said.
"Who is it?" Frisk said.
"It's Sans." Papyrus responded.
It took hours, but they found Sans. He was lying on a tree branch, taking a nap.
"Sans! What are you doing?" Papyrus said.
"Just resting." Sans said.
Papyrus and the others slowly approached the tree where Sans was.
"We are not gonna hurt you." Isadora said.
Sans tried to attack everyone, but failed.
Everyone ran away on the forest, chasing after Sans.
After a long chase, they finally caught the skeleton.
"LET ME GO!" Sans shouted, being holded by Undyne and Toriel.
His brother turned him back on his normal self again.
Lyzairooye was having a tea party.
"LYZAIROOYE!" Papyrus yelled.
"Huh?!" Lyzairooye said. When she looked at the monsters that were now back to normal, a silver aura appeared on her body, turning her in stone again.
"Nooooo!" Lyzairooye yelled, feeling her whole body turning into stone.