From a guest: "Yo, can you do a best friends one where nod... One where they get on a PRANKING SPREE!"

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Thor yawned as he got up from bed. He stretched and walked off to the bathroom. The moment he went inside, he let out a shriek once he saw a silly doodle of his brother on the mirror.

"LOKI!" he snarled. "WHY?!"

A piece of paper was soon spotted on the sink. He picked it up and opened to read the message.

"Dear Thor,

Guess what today is? It is day of fools! Or what the mortals call as April Fools Day! How did you react to my first prank? It was SO good! Anyway, my best friends and I will be going on a pranking spree, and Jack and I are targetting you and your Avenger friends. Good luck! XP

Love Your brother, Loki"

"Day of... FOOLS?!" Thor's eyes widened then he ran to the calender. "By ODIN'S BEARD, IT IS THE DAY OF FOOLS!"

From outside his room, Loki and Jack laughed before letting the Wind guide them out into the halls.

This day was going to be pretty interesting...

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Tony yawned as he came out of his lab and entered the kitchen. He went to brew his coffee, but when he took a sip, he immediately spat out the liquid.

"What the fuck?!" he set the mug down and groaned. "JARVIS, what happened to the coffee machine?"

"Unknown, sir. It is full and functioning,"

"Then explain WHY THE HELL DID MY COFFEE TURNED TO WATER?!"

"Apologies, sir, but I know nothing of it,"

"Argh," Tony sighed and turned to leave. "I'm just heading back to my lab..."

"Sir, your lab has been locked indefinitely,"

"WHAT?! JARVIS!"

"I did not do anything to it, sir. It had been locked the moment you left,"

"SON OF A-!" Tony face-palmed. "I swear if Pepper locked my lab-"

"Bad morning?" Steve questioned as he entered the kitchen.

"FIRST, my morning coffee turns into water THEN my lab gets locked!" Tony hissed.

"At least you'll be out of the lab for a while," Bruce commented, entering behind Steve.

"NOBODY ASKED FOR YOUR OPINION!" Tony snarled.

"Looks like SOMEBODY doesn't have his morning coffee yet," Clint chuckled as he and Natasha came in.

"WHO RIGGED MY COFFEE MACHINE AND LOCKED MY LAB?!" Tony roared out. "TELL ME!"

"Good morning, friends!" Thor greeted, entering with his usual smile.

"Not-so-good for Tony over here," Steve pointed to the grumpy-looking billionare. "Someone messed with his coffee machine and locked him from the lab,"

"Ah, a Day of Fools trick?" Thor guessed.

"Is it April Fools Day?" Clint laughed. "Guess it makes much more sense,"

"WHO'S TRICK IS THIS?!" Tony let out a roar.

"I have a feeling that this is all my brother's doing," Thor shrugged.

"Your brother, Loki?" Bruce raised an eyebrow. "Isn't he in prison?"

"He and his best friend, a Winter Spirit called Jack Frost, are out on a pranking spree for the whole day," Thor shrugged. "They'll only get you once, do not worry, but they're pranks will always turn for the worse,"

"Son of a-" Tony smacked his head on counter.

Jack and Loki heard him from under the table. Both laughed silently before Jack dropped a snowglobe to disappear.

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Steve entered his room to get dressed for the day. He went into the bathroom to shower then once he was done, he went to his closet to get a new set of clothes. Amongst his clothes, he found his shield leaning against the wall. Confused, he pushed some of the clothes to get it. When he did, he saw a familiar symbol pasted on his shield.

"HYDRA!"

He grabbed his shield and tossed it to the door, breaking it as it went through the halls.

"DAMMIT, LOKI!"

From the other room, Loki and Jack were laughing out loud as before they ran to head up to the vents.

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Natasha sparred through the droids that Tony made. She dashed and slid, avoiding each hit before jumping over to shoot down the droid. As soon as she took out her gun to shoot, a flag with the words 'BOOM!' came out.

"What the?" she stared at her gun and groaned. "LOKI! FROST!"

From outside, Jack and Loki high-fived each other then they ran off to the living room.

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"Time to set up some pranks!" Clint cackled as he poured some glue onto the couches.

As soon as he was finished, he slowly moved backwards towards the TV. He turned and found the remote on the television. He grinned, getting the idea to glue the remote to the table, so he reached out to grab it. When he tried to, however, he found himself suddenly stuck.

"WHAT?!" he pulled on his hand but realized that his hand was glued to the remote. "YOU TWO PRANKSTERS! YOU OUTPRANKED ME!"

Jack and Loki appeared in the middle of the living room and laughed at his predicament before running off.

"Ha-HA! Funny!" Clint growled. "Very, VERY funny..."

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"You do it,"

Bruce came to a stop as he heard whispers from the lab.

"No, YOU!"

"No, no, YOU do it!"

"NO! The Hulk's gonna KILL me!"

"You're already dead, Jack. I'M not,"

Bruce sighed, shaking his head. He then entered the lab to find Loki arguing with a white-haired teen, who Bruce guessed was Jack Frost.

"Uh, excuse me?"

"GAH!" the two jumped and turned to face the doctor. "Oh,"

"What are you two planning this time?" Bruce asked.

"Erm... NOTHING!" they spoke before rushing out as fast as they could.

Bruce watched them leave then he shook his head. He turned the lab, but when he closed the door, a bucket of ice cold water fell on top of his head.

"Ugh..." he hissed, his neck turning green as he gritted his teeth. "Of course..."

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"Ah, so you have ALL been pranked?" Thor laughed.

"Even ME, and I LOVE to prank on April Fools Day," Clint whined.

"Hey, Point Break, can you get them to stop?" Tony frowned. "They're trashing the place!"

"Not to mention irritating the Other Guy," Bruce stated with a growl, trying to suppress the Hulk.

"How long is this again, Thor?" Steve questioned.

"The whole day, as I early stated," Thor shrugged. "They should be finishing the day with an ultimate-"

All of a sudden, millions of water balloons fell from the ceiling. They all gasped and shivered when the ice cold water met their skin.

"-prank," Thor hissed with a shudder.

"UNLIMITED WATER BALLOONS!" Loki and Jack cheered from above them. "BALLOONS, ATTACK!"

"GAH!" With that, the Avengers ran to take cover from the never-ending water balloons being conjured from the sky.