One morning in Unikingdom, Puppycorn was still sleeping in his bed. Unikitty rose up beside him and rang an alarm clock, causing him to wake up, "Good morning little bro! Today's the big day!" she announced.
"Wow! It's... I forgot." he said.
"Today, we're gonna become peasants!" Unikitty said, putting a ragged looking hat on her and Puppycorn's heads.
"Awesome! What are we gonna do first?" Puppycorn asked.
Unikitty held up a pizza box, "Well first, no more food!" she said before tossing it out the window and giving him a bowl filled with a wet, powdery substance, "Peasants survived on powdered gruel."
"Well, if this is what the peasants loved, than I shall too." Puppycorn said with slight disgust before lifting the spoon to his mouth.
"April Fools!" Unikitty said before he could.
"Ha! You got me there sis." Puppycorn said while throwing the bowl away.
"Indeed I did." Unikitty said before flying out of Puppycorn's room and going into the kitchen, "Gee, I'm thirsty." She then reached into the fridge and pulled out a large pitcher filled with juice, "This is an extreme thirst!" she said in a deep voice before bringing the pitcher down with a thud. Later, Unikitty put an umbrella in a shot glass filled with juice from the pitcher on the table, which was filled with many others, "Phew, I'm exhausted." she said while wiping her brow, "I guess I'm gonna have to drink all these drinks... April Fools! To me." She held up a hand mirror to her face while saying this before laughing and flying outside.
Meanwhile, Master Frown was spying on her through a telescope in his apartment, "Wonder what she's so happy about?" he asked sarcastically before walking away, passing by a calendar on the wall. He then bolted back to it upon realizing the date written on it, "April 1st!? Oh, that's right, April Fools Day is one of Unikitty's favorite holidays!" he said before putting an ice pack on his head and picking up the phone, "Yes, Master Doom, I can't come in today. I've caught something terrible."
"What did you catch?" Master Doom asked on the other line.
"The front side of the calendar." Master Frown said while holding it up.
"Uh, hang on Master Frown, a few of our top executives are visiting today to hand out recognition awards. And they want you to be Doom Lord of the month." she said, causing Master Frown to get a shocked look on his face for running off.
Back at Doom Lord HQ, Master Doom and Unikitty were sitting in the main hall by the phone, giggling to themselves. Master Frown walked through the door, "I have arrived." he said with an air of importance before strutting to the center of the room. He then stopped once he noticed that they were just they only ones in the room, "Wait, what's going on? Where's the rep?" he asked.
"You just missed him." Master Doom said while stifling laughter.
"Yeah, but he told us to tell you-" Unikitty started to say before giggling.
Master Frown grabbed her by the shoulders and pulled her close, "Tell me what!?" he asked.
Unikitty whispered in Master Frown's ear, "He told me to tell you... April Fools."
Master Frown had a blank look on his face, "Well, it's been nice knowing all of you. I'll just be out of your hair now." he said in an ominously happy tone while walking away.
"Uh, Master Frown, wait." Unikitty said worriedly.
"Just send my last check to my home address Master Doom." Master Frown said.
Unikitty suddenly flew in his way, "Wait, Master Frown! It was just a joke! No more jokes on you today I promise!" she said.
"Really?" Master Frown asked.
"Of course, there are tons of other willing participants. Right Master Doom?" Unikitty asked as the Doom Lord leader sat in her chair, causing a whoopee cushion to go off.
"As long as it's not me, I'm fine." Master Frown said before walking away.
Later, at a buffet in Frown Town, an elderly female citizen was having trouble at the utensil stand, "Why can't I seem to find the forks?" she asked.
Unikitty then walked up to her, "Why, they're right here." she said, pointing to a certain slot.
The citizen reached in pulled out a spoon, "Um, this is a spoon." she said in a slightly annoyed tone.
"April Fools!" Unikitty said, causing the citizen to let out a small laugh before walking away. Unikitty laughed right after until she noticed Master Frown standing right behind her with an angry expression, causing her to fly away.
On a random sidewalk, a male citizen was looking at a map until he noticed Unikitty walking by, "Excuse me? Do you by any chance know where town hall is?" he asked.
"Oh sure, it's right over there." Unikitty answered, causing the citizen to turn around. When he did, Unikitty turned her head around revealing a poorly drawn face drawn on the back of it.
"Um, I don't see any-" the citizen said while turning back to Unikitty, "Hey, where'd that cat-girl go?" he asked.
Unikitty turned her head back around and said, "April Fools, I'm right here!" Both her and the citizen laughed before Master Frown walked up to them.
"What are you doing on the sidewalk!?" he shouted at her, causing her to fly away.
Unikitty could be seen running a lemonade stand on a street corner. Master Plague walked up to her, "Gimme on lemonade, couple ice cubes." he demanded.
"Sure thing." Unikitty said before making the glass with an ice cube and handing it to him, "There you go!" Master Plague started drinking the glass, until Unikitty giggled, causing him to stare at her suspiciously. He began drinking again, only for Unikitty to giggle again, resulting in him giving her the same stare. The Doom Lord then finished his drink with a satisfied sigh before Unikitty burst out laughing.
"April Fools!" she said.
Master Plague grabbed her by the collar, "What did you do to my drink!?" he shouted.
"I-I-" Unikitty tried to say while holding back laughter.
"YOU WHAT!?" Master Plague asked.
"You asked for a couple ice cubes in your drink, but I only put in one!" Unikitty said before laughing.
Master Plague stared in bewilderment for a moment, "I guess that is pretty funny." he said before walking away while chuckling.
Unikitty was still laughing while rolling around on the ground, while Master Frown was nearby, trying to spray paint a random wall. Annoyed by her laughing, he stuffed some rags in his ears before starting again. Unikitty continued to laugh, which somehow made her tongue detach from inside her mouth, it had a mouth, eyes, and a horn like hers. They stared at each other for a while before they both started laughing, "Hey, your shoe's untied!" Unikitty said, causing her tongue to look at it's tip, "April Fools! You're not wearing shoes!" she said before hugging her tongue while laughing. She then pulled out a megaphone, which made their laughter even louder, "APRIL FOOLS!"
Master Frown threw down his paint can and tore out the rags in frustration, "That's it! I'm gonna show Unikitty what a real April Fool looks like!" he said.
In the town square, Master Frown was busy putting a cupcake on a panel. He then walked up to Unikitty, who was nearby feeding the pigeons. He got her attention before pointing to the cupcake, "Yay! A tasty treat just for me!" she said excitedly before flying onto the panel and eating the cupcake. Master Frown then went behind a tree, where he produced a remote from his cloak. Above the panel was a line with hook, which led to multiple traps around the square. Unikitty eventually finished the cupcake and was wiping her face with a napkin.
"April Fools!" Master Frown shouted before pressing a button above the remote, causing the panel Unikitty was on to spring up. She was then hooked to the line by her tail, which proceeded to throw her into a bag of flour. Master Frown laughed hard at her expense as she was sent spinning around a lamp post before running through a bucket of glue and some feathers. Master Frown laughter turned almost maniacal as Unikitty was sent through a few more flips and spins before she was slammed into the side of building, causing onlookers to wince. Unikitty eventually slipped off the building and screamed as she began to fall, "I got you Princess!" Master Frown said as he seemingly ran to her rescue. He reached the spot where she was going to land and held out his arms, right before he suddenly pushed a dumpster into the exact same spot, causing her to fall in.
"Whoops." Master Frown said before opened the side door of the dumpster, causing Unikitty to fall out. She was covered in trash and had a sad look on her face, "April Fools! You little freak!" Master Frown said before laughing. While he was, Unikitty turned blue and started to whine before breaking into tears while flying away. "Unikitty, I was just kidding!" Master Frown said before noting the onlookers were all glaring at him, "Come on, you people know I was just kidding right?" he asked.
"Man, even for a Doom Lord that was cruel." a male citizen said.
"I honestly don't know why we let that guy in." a random Doom Lord said. The crowd then began to disperse.
A random citizen walked up to Master Frown and said, "April Fools, jerk." before walking away.
"Oh, come on!" Master Frown said.
"Boo! You stink!" an unseen citizen said before Master Frown was left completely alone.
"Come on, it was just a joke!" he said before sighing and sitting on a bench, "Why is it that whenever I'm having fun, it's wrong. I didn't mean to make her cry... OK, maybe a little." He groans in frustration before standing up, "I guess this means I'm gonna have to tell her that I'm sor-eaach." he tried to say while making a face, "Huh? I guess this means that I need to aplolo-" his sentence was cut off by his throat seemingly malfunctioning, "This is gonna be harder than I thought."
Master Frown eventually made it to Unikingdom, right to front door of the castle. He knocks on the door, "Uh, Unikitty? Can you come out? I have something to tell you. Unikitty?" he calls out. A dirt clod hits him in the back of the head, causing him to turn around and see what appears to be Unikitty's horn poking out of a hole being dug, dirt flinging out of it. Master Frown walks up to her, "Uh, Unikitty, I was thinking about what happened and... Well, I think I sort of owe you... This isn't something I normally do, so pay attention Unikitty. I just wanted to tell you that-" he starts to say before he notices that who he thought was Unikitty, was actually Puppycorn wearing a blue horn like Unikitty's, "Puppycorn, what are you doing?" Master Frown asks.
"Digging." Puppycorn simply said.
"Why is your horn that color?" Master Frown asked while pointing at his horn.
"Huh, I don't know." Puppycorn said while wiping his horn, causing some blue paint to wipe off, revealing his horn's natural color.
"Ugh, where's Unikitty?" Master Frown asked.
"She's in the castle. She's depressed." Puppycorn answered.
"With what?" Master Frown asked.
"I don't know, but it must've been pretty bad to make her cry like that." Puppycorn said.
Master Frown immediately ran back to the front door of the castle, "Unikitty, let me in!" Master Frown shouts. Unikitty's paw appears in through a crack in the doors and puts a 'Do Not Disturb' sign on the handle. Master Frown then pulls out a boombox, "You don't want to make me do this Unikitty! ...OK, you asked for it!" he said before turning it on, causing it to play loud rock music while he held it up.
Unikitty eventually opened the door just a little, "What do you want?" she asked with a sad voice.
"Unikitty, I just wanted to say that I'm-" Master Frown tried to say 'sorry,' but he had his tongue out, causing it to be intelligible.
"What?"
"I just wanted to say that I'm-" this time, the word was blocked out by the sound of a donkey coming from his mouth.
"What?" Unikitty asked again, now opening the door fully.
"I just want to say that..." Master Frown began, putting a lot of strain on himself to finish before his head exploded, leaving only his body, "There's gotta be an easier way to do this." his disembodied voice said.
Master Frown wrote on a piece of paper before rolling it up and putting it in a glass bottle. He closed the bottle with a cork before rolling it to Unikitty. She picked it up and looked at it, "Well, aren't you gonna open it?" Master Frown asked.
"I can't. I don't have a bottle opener." Unikitty said, causing Master Frown to groan in annoyance.
Master Frown and Unikitty now held two ends of a basic tin can communication device. He pointed at each of them before giving a thumbs up and running off with his end. Once he was far enough, Master Frown spoke into his end, "Unikitty, I'm-" he said before whispering the rest and putting his ear to his end. He then heard a grinding sound, causing him to look towards Unikitty with a pair of binoculars. She had her ear to her end of the device, but the noise was coming from Puppycorn using the string to floss his teeth. Master Frown throws his binoculars on the ground in frustration before walking up to Unikitty, "Unikitty, all I'm trying to say is that I'm..." He stops mid-sentence to enclose his face within the hood on his cloak before letting out a muffled "...sorry." before opening his hood back up.
"But I couldn't-" Unikitty started to say before the castle doors were slammed in her face by Master Frown.
"I said it already! My conscience is clear!" he said before walking away.
While he did so, an apparition of Puppycorn appeared in front of him, "It must've been pretty bad to make her cry like that." it said before disappearing.
Master Frown continued to walk away before another apparition appeared, this time of the male citizen from Frown Town, "April Fools, jerk." it said before vanishing as well.
Master Frown sprinted away this time before another apparition appeared, this time of an elderly female-looking version of Master Frown, "You stink!" it said in the random voice from earlier.
"Mother!?" Master Frown said before running back to the front doors of the castle and falling on his knees, "All right, all right! I'm sorry, I'm sorry, I admit it, I'm sorry! I didn't mean to hurt you, in fact, I like you! I think of you as my only motivation to make my evil deeds have more impact! Your unrelenting happiness acts as target for me to practice on! I also appreciate the way you smile at at me whenever I insult you, and the way you laugh whenever I try to ruin your day! I also appreciate Puppycorn, Dr. Fox, Hawkodile, Richard, and all the other people that I openly despise!" Master Frown admitted, panting afterwards.
Unikitty opened the door, "Master Frown, is that true?" she asked.
"Yes Unikitty, it's true. It's all true." he said.
"Even the part about the lima beans and car chase?" she asked.
Master Frown looked at her with a confused expression, "What the...? Yeah, OK. Just promise me you won't tell anyone about this."
"I promise." Unikitty said.
"Really?"
Unikitty then opened the door all the way, revealing every Unikingdom citizen standing behind her, "April Fools!" they all said.
Master Frown just stood there, his eye twitching before he started chuckling, "Yeah! That's right! April Fools! I just told you all!" he shouted before running away.
"What would we do without Master Frown?" Unikitty said.
