My Brave Pony Starfleet Yo Kai Adventure

by PikachuSkitty

Rating: everyone
Tags: My Little Pony: Friendship is Magic, Alternate Universe, Other, Comedy, Adventure, Princess Celestia, Crossover
Length: 4374

Grand Ruler Celesto and Queen Celestia have one alternate adventure they'll never forget

When a potion in Professor Brains' lab falls over, their majesties find themselves in an alternate universe with beings called Y-Kai. With the help of their new friends Nate, Whisper and Jibanyan, these two will go on a journey to find a way home, meeting new Yo-Kai friends along the way.

Crossover with Yo-Kai Watch

Published 2018-11-08 12:20:01 UTC
Last updated 2018-11-14 17:42:24 UTC

Episode 1: New Reality

Their majesties screamed in fear as they moved through the portal until it spit them out in an alleyway. They crashed on the pavement and on each other. Dazed from the trip, the two rubbed their heads. "Are you alright, darling?" Grand Ruler groaned.

"Ugh. I'm alright, darling." Celestia replied. They both got up and brushed themselves off. Looking around the alley, they saw the mouth of the alley led into what looked to be a city. "Where are we?" Celestia asked.

"I don't know, darling."

"Should we look around?" Grand Ruler walked towards the mouth and peeked out of the alley. There was alot of people walking around. "There's too many people here. We'll be too exposed. We should wait until it becomes darker." he suggested. Celestia nodded. "So what do we do until then?"

That's when they heard a voice coming down the alleyway, "I'm telling you guys, this is where that bright flash came from."

"Quick, Hide!" Celesto hissed. The two were forced to hide in the only hiding spot... the dumpster. Openeing the lid and holding their breath, the two leaped into the dumpster just in time.

Four kids came down the alleyway.

Nate Adams: a boy with fair-skin, big black eyes and brown hair worn with three large spikes that resemblance cowlicks. A small amount of hair sticks down at his neck. He wears a special watch called the Yo-kai Watch on his left wrist. The Yo-Kai watch allows him to see Yo-Kai, invisible spirits.

Also, he wears a red short sleeve shirt with a white rim on each sleeve and color. On his arm is a blue and white design. His cargo pants are light grey and worn with a brown belt, while his boots resemble a pair of white shoes accented with blue and red.

Katie: a girl also with fair-skin. She was long brown hair with a ponytail in the back. She wears a white and blue shirt.

Eddy: a boy the same skin tone whom wears headphones on his head all the time He has a green jacket.

And Bear: The big one of the four with short, back, spiky hair and he wears a black and white jacket.

"Are you sure, Eddy?" Nate asked.

"I'm sure of it." Eddy replied.

"Well, I don't see anything." Kaite commented.

Inside, the dumspter, their majesties held their breath, not wanting to give away their location, however that was becoming hard with their lungs beginning to burn and starting to feel a bit light-headed.

"There's nothing here, Eddy." Bear said.

Eddy sighed, "I really thought I saw something."

"Well, why don't we come back tommorrow?" Nate suggested. The three friends nodded and they all exited the alleyway, leaving Nate alone. That's when his Yo-kai friends appeared.

Whisper: a cartoony marshmallow-like white ghost with a curved black mask-like mark connecting his eyes. He has purple lips with the upper one vaguely resembling a mustache, a small swirled ice cream-shaped wisp atop his head and a wispy tail that constantly billows

Jibanyan: red and white coloured cat yo-kai with a chip in his left ear. He has yellow coloured eyes with large pupils, his nose and inner-ears are dull shade of pink. Attached to his collar is an aquamarine coloured bell, matching the flames at the end of his two tails.

"Nate, what's wrong?" Whisper asked.

“Something’s telling me something is in this alleyway.” He replied.

That’s then Jibanyan’s ears perked up. “Huh?” What’s that?”

“Jibanyan, what is it?” Nate asked.

“I hear something.” Jibanyan went over to the dumpster and flipped the lid open seeing their majesties crouched down. Their majesties screamed making Nate, Whisper and Jibanyan scream as well.

When they were done they all just stared at each other for a moment. “Uh... hi?” Nate said.

“Hi.” Celestia said.

“What are you two doing in the dumpster and what are you?” Jibanyan asked. Whispered looked them up on his Yokai pad. “They’re not Yo-Kai that’s for sure.... Aha! Here it is. It says here they are alicorns: mythical ponies with am amazing magic and power. They are also considered to be royalty as well. But a golden three horned alicorn with golden wings is extremely rare.”

“Alicorns, huh?” Nate looked at them. “So what are your names, if you don’t mind. My name is Nate Adams and these are my Yo-Kai friends; Jibanyan and Whisper. “

Their majesties looked at the three friends with hesitation. “It’s alright, we won’t hurt you.” Nate promised. Hearing the calmness and kindness in his voice, their majesties decided to introduce themselves. “My name is Queen Celestia and this is my husband Grand Ruler Celesto.”

“Alright. So what are you two doing in here?” Jibanyan asked.

“Indeed. This is not a spot for royalty such as yourselves.” Whisper added.

“Well-.” Before Grand Ruler could explain, they all heard a humming noise. Nate and his friends hid away as their majesties ducked back inside the dumpster. A man wearing an apron came out and moved the dumpster out to the sidewalk. At the same time a garbage truck appeared.

Nate and this friends watched in horror as the garbage trucks forklifts lifted the dumpster and the content spilled into the back of the truck, including their majesties! “Woah, Oof!”

“Oh no!” Nate cried.

“Oh dear!” Whisper whimpered. The garbage truck drove away. Nate and his friends came out onto the sidewalk. “We’ve gotta follow that truck, come on!” Nate snapped. Jibanyan and Whisper agreed and followed Nate to the city dump.

Meanwhile, the majesties were tossed all around as the truck bounced down the road. “Now where are we going? Woah!” Celestia asked.

“I don’t know, dear. Woah! Oof!” Grand Ruler answered. Suddenly, the two felt a jerk that send them flying forwards and landing on each other. “What was that?” Celestia asked.

Their majesties felt themselves being lifted and they fell into a large pile of garbage. They heard the truck move away and they breached the surface, coughing and gagging at the horrid smell. “Ugh, it stinks!”

“Indeed.”

Unfortunately, the two found themselves neck-deep in the garbage. The two of them tried to get themselves free but the garbage was too thick for them to move. “I can’t move.” Celestia said.

“Me either.” Her husband added.

“How are we gonna get out?”

Nate, Jibanyan and Whisper has arrived at the city dump. “I don’t see them anywhere.” Nate said. Jibanyan looked around, “There!”

Nate and Whisper saw their majesties struggling to get free. “Come on, let’s go!”

Nate and Whisper followed the cat into the dump and they climbed the pile of garbage where their majesties were trapped. “Celesto! Celestia!” Nate called.

Their majesties looked and saw Nate and his friends. “Nate, Jibanyan, Whisper, thank the stars.” Grand Ruler said with relief. “We’re stuck.”

“Don’t worry, we’ll get you two out.” Jibanyan stated. “Can you get an arm free?”

Their majesties grunted as they pulled their arms out of the garbage. “Perfect.” Jibanyan grabbed Celestia’s hand while Nate and Whisper grabbed Celesto’s arm.

The three friends pulled and pulled until their majesties were out of the garbage pile. “Thanks for that.” Celestia praised.

Nate smiled at them, “No problem.”

“Nate, I hate to bring up bad news but what are we going to do with them?” Whisper asked.

“Yeah, they can’t stay out here. They’re too exposed and they could easily get into danger again.” Jibanyan added.

Nate thought for a moment. “I know, they can come live at my house.”

“What?!” Whisper cried. “Nate, there’s no way you can pull that off!”

“What makes you say that?” Nate asked.

“How are you going to sneak them into the house. Unlike, Yo-Kai we are invisible to your parents while these two are not.”

“Hmmmm.” Nate looked around the dump and saw two large cardboard boxes. “I have a plan.”

“Can we do that after we get these tow a shower?” Jibanyan said while holding his nose. “Sorry, but these two stink.”

Nate and Whisper were just now smelling the scent of garbage from their majesties and held their noses too. “Indeed.”

Their majesties just looked a little embarrassed.

At Nate’s house, his mom and dad were going on with their business. Nate’s mom was making dinner while his dad was reading the newspaper. Nate quietly opened the door holding two large cardboard boxes. He quietly walked upstairs and into his room. Placing the bows on the floor, their majesties came out of the boxes. “Ugh, you couldn’t find anything more... comfortable?” Celestia asked rubbing her sore muscles.

“Sorry.” Nate apologized. Her husband came out also rubbing his neck. "Thanks for your hospitality."

"No problem. So you two wanna tell me what you're doing here? You didn't really get a chance to explain it back there." Nate said. Their majesties agreed and told Nate, Jibanyan and Whisper everything. When they were done, the trio was amazed.

"Okay, let me get this straight." Jibanyan recalled. "You two come from the Dimensional Universe and are rulers of a planet called United Equestria along with you little sister, but due to a Professor's Alternate Dimensional Potion spilling which created a portal and sucked you both in and you ended up in this world?"

"That's correct." Grand Ruler confirmed.

"Awesome!" Nate said.

"Indeed. But how are you two going to get back home?" Whisper asked.

"Well, that's the problem. We don't know." Celestia replied. The three friends gasped. Just then, Celestia's horn began flickering slowly. "What's with the blinking horn?" Jibanyna asked.

Her horn blasted a beam and it turned into a screen with familar faces on the screen. "Luna? Lightning Dawn?!" Grand Ruler cried. Luna and Lightning sighed in relief. "Master, Queen Celestia, thank goodness you're both alright." Lightning claimed. "Whose the kid, cat and marshmellow?"

"Marshmellow! I'll have you know, I am a Yo-Kai a powerful spirit!" Whisper exasperated.

"Anyway, who are you three?" Luna questioned.

"My name is Nate Adams and Jibanyan and Whisper are my friends. We found these two hiding in an alleyway." Nate explained.

"And he has allowed us to stay with him until we can return home." Celestia added. "Which reminds me. How did you manage to find us?"

"I studied a spell that allows communication through dimensions, sister. Once I've located you both, I used the spell to contact you. I was so worried when you both vanished." Luna explained.

"Sorry sister. So how are we going to get back home?"

"Professor Brain says he can recreate the potion, but it's gonna take a long time." Lightning answered. "About a few months."

"A FEW MONTHS!" Their majesties exclaimed in shock. "That's what he said." Lightning added.

Their majesties groaned. Nate placed a hand on their shoulders, "Don't worry, we'll take care of you until then."

"Yeah, you can count on us." Jibanyan agreed.

"Indeed." Whisper said. Their majesties smiled at their three new friends. "Alright then, Nate Adams, I'm entrusting you with my sister and brother-in-law's safety." Luna claimed.

Nate nodded. "They'll be safe we me Princess Luna." Luna and Lightning nodded, "Please be safe, Master."

"I'll be fine Lightning."

"Right, until then sister and brother-in-law." Luna said. With that the screen vanished.

"Well then, looks like we're gonna be roommates for a while." Jibanyan stated. Their majesties nodded. That's when their stomachs growled loudly, making the two blush. "Hehe. Excuse us." Grand Ruler said.

"Sounds like you two could use some dinner. Jibanyan, can you go sneak something from downstairs?" Nate asked. Jibanyan nodded and he exited the bedroom and walked downstairs. Soon, he came back with two plates with chicken, vegetables and mashed potatoes on it. "Here you go." he handed the plates to their majesties. "Thank you."

"Jibanyan, where'd you get the plates from?" Whisper asked with a raised eyebrow. "Ummm." Jibanyan began whistling innocently.

"Nate? Where did our plates go?" Nate's mom called up. Now it was clear. "You took my mom and dad's dinner plates?!" Nate exclaimed.

"You said 'something' so I grabbed the plates!"

Nate groaned and face-palmed. "Oh brother." Their majesties looked at Whisper. "Trust me, you'll get used to this." he said with a shurg. Their majesties looked at each other and continues eating their plates.

"You can't steal from my mom and dad!"

"Their majesties needed something to eat!"

"You could have gone to the store!"

"I am not your mom!"

Episode 2: Yo Kai Sailornyan and Thornyan

Any attempt to replicate Yo-Kai behavior would be ill advised

Unexplained occurrences happen every day. But if you posses the Yo-Kai Watch, you will have the amazing and rare ability to see the elusive Yo-Kai. Invisible spirit like entities, responsible for life's daily annoyances. But beware... when a Yo-Kai enters your life, things will never be quite the same....

Yo-Kai Thornyan

Sunlight came through the window in Nate's bedroom. The shining light hit their majesties in the eyes, making them groaned and awake. "They yawned and stretched out in their sleeping bags. Nate found them in his closet and let their majesties sleep in them. Now, they saw Nate putting on his shirt. "Oh, good morning." he greeted.

"Morning. What are you doing?" Grand Ruler asked.

"I'm getting ready for school." Nate replied.

Whisper and Jibanyan then came in with two bowls of cereal. "Here you are, your majesties, breakfast is served." Whisper declared. Their majesties took the bowls of cereal. "Thanks." Celestia said. And the two began to eat the cereal.

"Too bad, you two can go to school with me." Nate sighed. Then an idea struck him. "Wait maybe they can?"

"Huh?!" Jibanyan and Whisper said. "Nate, I hate to rain on your parade but I doubt the kids in your school would react nicely to two all powerful alicorns attending Springdale School." Whisper said.

"Maybe they cast a disguise spell on themselves?"

"I doubt the two know such a spell."

"Actually we do." Grand Ruler replied, having finished his bowl of cereal. Whisper cried and faceplanted on the ground. "You do?!" Nate exclaimed.

"Indeed. Ready, darling?" Celestia nodded and their horns glowed and in a quick, bright flash, their majesties looked like two normal kids. They were Nate's height but Celestia had white skin with long hair with rainbow colors like her mane and Celesto was also white but he had a black shimmering hair like his mane. "Woah, awesome!" Nate exclaimed.

"So cool!" Jibanyan added. Whisper recovered and stared at their majesties. "Right now we have to sneak them out of the house again."

Their majesties sweat-dropped and groaned, knowing what was coming.

Springdale School

"Alright class, today we have two new students with us today. Meet Celestia and Celesto." Mr. Johnson introduced. Once Nate sneaked them out of the house, using the same cardboard boxes from before he took them to his school. Luckily, they were placed in the same class as him.

"Hello Celestia and Celesto." the entire class said in unison.

Celestia and Celesto waved back to the class. "Alright, you both can sit on either side of Nate." Mr. Johnson said. Celestia and Celesto took their seats by Nate. Celestia sat on the right. Celesto sat on the left. "Alright class, today we'll discuss.. Ah- Ah- Ahchoo!"

Just then, thorns shot out and all over the class room, freaking the children out. "What the-?" Nate said.

"Sorry class, don't know what Ah-choo!" More thorns came out this time. The children freaked and ll left, leaving Nate, Celestia and Celesto alone, except for Mr Johnson. "No normal sneeze caused thorn to shoot out. This has got to be the work of a Yo-Kai." Celestia said.

Whisper and Jibanyan showed up then. "Here." Whisper handed their majesties two more Yo-Kai watches like Nate's "Point them at Mr. Johnson and you'll see the Yo-Kai." Their majesties complied and pointed the light at Mr. Johnson and sure enough a Yo-Kai appeared on his head.

"Got'cha!" Nate said.

"It that a catus cat?" Celestia asked. The Yo-Kai was similar to Jibanyan except it was ivy-green cat with dull pink nose. His inner-ear is dark yellow, while his muzzle, paw tips, and chest fur are white. He wears a white collar with a dark orange sphere, and around his stomach is a dull orange band. On his head are nine long spikes with white and emerald coloring nearing the tips. His tail flames are orange, yellow, and white and are also spiked.

"Whose that yo-kai?" Grand Ruler asked. Whisper scrambled through his Yo-Kai pad. "Haha! That's the Yo-Kai Thornyan."

Thornyan Tribe: Charming

"Thornyan?" Nate asked.

"Yes, it's a Yo-kai who makes the inspirited shot thorns whenever they sneeze. He is responsible for the well-known expression ' Say it don't spray it'!"

"We have to get him away from Mr. Johnson." Nate claimed.

Thornyan spotted the trio and freaked. "Oh nyo!" he leaped off of Mr. Johnson and ran into the hallway. "After him!" Grand Ruler cried. The three friends stood up and followed the thorny cat outside. They found him on the side of the school, hiding in the bush, shivering in fear. "Poor thing, he looks completely frightened." Jibanyan cooed.

Grand Ruler walked towards him, "Careful, my love." Celestia cautioned. Grand Ruler kneeled down, "Excuse me, Thornyan."

Thornyan stopped shivering and looked at him with fear in his eyes. "W-What d-do you... sniffle.. want?"

"I just want to talk to you. That's all." Thornynan tilted his head. "What do you wanna talk about?"

"Why are you inspiriting people?"

Thornyan sighed and explained, "When I became a Yo-Kai everybody ran away from me because I shot thorn whenever I sneezed so I thought if I inspirited people and make them shoot thorns then I would have a friend. But no one can see me so I still felt alone." The three felt bad for Thornyan. Because of his thorns and everybody being afraid of him, he felt alone in the world. "I'm sorry for causing trouble. I'll just go when I can't do any harm and be alone."

The cactus cat came out of the bush and began walking away.

"... Wait! Thornyan!" Grand Ruler cried. Thornyan stopped and turned to hm, "Yes?"

Grand Ruler walked to the thorny cat, "If you want to, you can come and live with me."

Thornyan gasped while the others stared in shock. "Really?!" Thornyan asked.

"Yeah. I know what's it's like to feel alone and I want to help you." Thornyan never thought someone would want to be friends with him. He smiled with tears and leaped into Grand Ruler's arms. "Thank you." he sobbed with joy. Celestia, Nate, Whisper and Jibanyan all smiled at the scene.

Thornyan glowed and his metal floated towards Grand Ruler.

"Your medal?"

Thornyan sniffled and looked at him. "I want you to have. Now we're friends forever." Grand Ruler couldn't help but smile at the little thorny cat. "I'm so happy for you darling." Celestia said, coming up at him, "You have your first Yo-Kai friend."

Whisper and Jibanyan came up then. "Indeed." Whisper said. "And you'll make even more throughout your time here." Grand Ruler and Thornayn just smiled at each other.

Yo-Kai Sailornyan

Celestia, Celesto and Nate were entering the classroom when they noticed all the girls screaming happily and jumping around in joy with little hearts around their heads. "What's going on here?" Celestia asked. Nate sae Bear and Eddy and asked, "Hey guys, what's going on with the girls?"

"We have no idea." Bear replied.

"One minute they were fine and the next they started screaming happily." Eddy added.

"Hmmm... this has got to be a Yo-Kai making them act like that." Celestia said. She pointed her watch light at the girls and sure enough a Yo-Kai appeared. It was a pink cat that has the same white part of the head as most of the cats. Her nose is peach, as well as the small circular blush underneath her eyes, which are blue with three highlights inside the darker blue area. She has one eyelash on each eye. The tips of her paws are white. She had two tails with blue flames shaped like water droplets at the ends. She wears a sailor uniform with a red ribbon attached to her thin yellow collar with a big blue sphere in the center. A sailor cap with the same dark blue and white colours of the uniform and a yellow fire-like symbol in the middle rests on her head.

"Hello there." she said.

"Oh she's so cute." Grand Ruler said.

"Adorable." Nate added. Whisper looked it up on his Yo-Kai Pad. "Aha! This is the Yo-Kai known as Sailornyan."

Sailornyan Tribe: Charming

"She is the Yo-Kai responsible for girls screaming in excitement and acting super happy even when there's nothing going on. She responsible for the 'Why are you so happy?' phenomenon."

"Being happy is everything!" Sailonryan cheered.

"Okay... so how so we deal with her?" Nate asked.

"Time to make other people happy!" Sailornyan cried and she leaped away from the girls and dashed over to Celestia and inspirited her. "I'm so happy all of a sudden and it feels nice."

The boys all screamed in horror. "No! Now Sailornyan inspirited my wife." Celesto cried.

"Happiness is everything!" Sailornyan and Celestia cried.

"Grand Ruler I think time for your friend Thornyan to talk some sense into this cheery cat!" Whisper exclaimed.

"Come on out my friend!" He shouted as he tossed the medal into the air.

"Calling, Thornyan!" He caught the medal and inserted it into the watch.

"Yo-kai medal, do your thing!" He shouted as a voice called. "Summoning, Charming!" and a pink cyclone appeared as a familiar silluette danced.

"Alarming! Boom boom walla walla dance dance Charming!" an upbeat tuned played as Thornyan danced to it and finished by striking a pose. "Thornyan!"

(Like this)

Thornyan landed in front of Grand Ruler. "Thornyan, can you go talk to Sailornyan?"

"Okay, buddy." Thornyan walked over to the sailor cat. "Sailornyan, can you please stop inspiriting girls, please."

"But why?" Sailornyan asked. "Seeing everyone happy make me so happy."

'Yes, but people can't be happy all the time."

"They can't?" Thornyan shook his head, "People have other emotions than being happy. The other emotions are important, if they're just happy all the time then they really don't express the other emotions they have and that could lead to trouble."

Sailornyan thought about what Thornyan said. "Alright, so it's okay for people to be anything but happy?"

Thornyan nodded. "Alright. I understand." Sailornyan stopped inspiriting Celestia. "Huh? What the-?"

Sailornyan bowed her head, "I'm sorry for inspiriting you, please forgive me." Celestia couldn't be mad as such an adorable Yo-Kai. "I forgive you, Sailornyan. Just next time, try to see how other emotions besides happiness affect people alright?"

"I will." Sailornyan handed over her medal to Celestia.

"Really, you're giving me your medal?" Celestia asked.

Sailornyan nodded. "Great job darling." Celesto praised, coming up to her. "You have your own Yo-Kai friend now."

"I'm so happy for you." Thornyan added. Celestia smiled.

Now she has a new Yo-Kai friend of her own.

It's Recap Time!

"Hey Celestia and Celesto! Who'd you meet today?" Whisper asked.

Their majesties pondered for a second. "Thornyan and Sailornyan!"

Their majesties were caring for Thornyan who had a cold.

"Easy, buddy, you'll be just fine." Celesto said.

Thornyan showed signs of a sneeze. "Hit the floor!" Celesto cried. Their majesties fell to the floor, just as Thornyan sneezed and the thorns are snt flying. Whisper comes in, "Hey, you maje-" he paused when two thorns hit him in the eyes.

"AAAAAAAAAAAAHHHHHHHHHHHHH!"

Prologue: Potion Gone Wrong

One day in Professor Brain's lab, Grand Ruler Celesto and Queen Celestia, the co-rulers of United Equestria along with Princess Luna were helped Professor Brain clean up him lab. Celestia was sweeping the floor while Celesto wiping the walls and floor. "I can't thank you enough for your help, your majesties." he praised.

"No problem at all, Professor." Celestia said.

"Indeed, we're more than happy to aid you in your lab." her husband added. Celestia came to a shelf and gently bumped into it. One of the beakers with a glowing sparkling liquid was about to fall over when Professor Brain caught it with his magic. "Careful, your majesty. This is a very dangerous potion." he warned.

"Dangerous?" Celesto asked.

"Yes, this is an Alternate Dimension Potion. It's meant to send anyone to another dimension that could have stars knows what." Brain explained. Their majesties seemed a little impressed with the potion. Brain placed it back on the shelf. "Now be careful with this. Meanwhile, I have to check on how the lab boys are doing in the briefing room." Brain walked out of the lab, leaving their majesties alone.

"Wonder what kinds of dimensions are out there?" Celestia asked.

"We'll find out one day, darling. For now, let's finish cleaning." Grand Ruler suggested. Celestia nodded and the two got back to cleaning.

They were unaware of the potion rocking back and forth on the shelf. It fell to the ground and the glass shattered, spilling the glowing liquid on the floor. Celestia whipped around, "What in the universe?"

Celesto saw the spilled liquid as well. "Did you bump into it again?"

"No." Just then, the liquid began to glow brightly. "What's happening?"

The liquid rose from the ground and spun in a circle, faster and faster until it turned into a sparkling, white portal! "Woah."

Next, Celestia felt herself being pulled towards the portal. She tried to resist but the force of the pull was too much, she couldn't even teleport away because of it. "Celesto, help!" Celesto grabbed his wife, "I've got you darling." He tried to pull her away but it was too much and he found himself being pulled towards it as well.

"Hold on darling!" he cried as the two were finally sucked into the portal! The portal closed behind them leaving nothing behind, not even the shattered beaker.

"Your majesties, I've returned!" Brain called but when he entered his lab, he was greeted by an eerie silence "Umm... your majesties?"