A/N: I just got into Star VS. The Forces of Evil and this idea popped into my head after seeing there's not Sailor Moon crossovers... I have seen up to the end of season 2 (there's no place to watch it online). I do have a unique idea for the Sailor Guardians in this story, which I will get into later. I also plan to barrow ideas from both the manga and anime for this story as well as come up with my own ideas.

Also funny story about how I came to write it. See I was planning to write Ponies One Half yesterday, but I needed to double check the "Next Time" but as you know it was down all day yesterday and I was in the mood to write which thanks to the evil that 2016/2017 those are few and far between... so eventually I threw up my hands and wrote this story as it wouldn't leave my head. So anyways enjoy!

Disclaimer: I don't own Sailor Moon or Start VS. The Forces of Evil, if I did then I would conquer all other magical girl shows! And Madoka Magica would be finally get that sequel out! Mwahahahaha!

(Sees Star points at me)

Emma: But I do any OCs that may pop up... (under breath) I'm not evil! That was a joke...

Sailor Star

By Emma Iveli

Chapter 1: I was Not Expecting This!

One Thousand Years ago on Earth's Moon. Queen Serenity was dying after using the Silver Crystal to seal away a great evil. She had sent away her daughter's soul along with other's to be reborn on Earth. However something went wrong. And she sensed it.

"Oh no…" she thought in realization.

"My queen!" said one of her two advisers, a talking white cat named Artemis.

"What's wrong?" asked her other adviser, a talking black cat named Luna.

"It's nothing…" said Queen Serenity, "It will be very difficult but find my daughter when Queen Metaria awakens again…"

The two cats nodded at the Queen died causing the tow cats to be put into suspended animation.

In the present day, Star Butterfly skipped to school. She was a princess from another dimension called Mewni. Her parents sent her there to learn responsibility after given her family heirloom her family's wand.

Along with her was her best friend on earth, Marco Diaz.

Together they had gone on a couple adventures so far.

They noticed a bunch of kids gathered around something that was moving.

"Stupid black cat!" yelled one of them.

"You're evil!" said another of them.

"Why are we doing this! It's just a cat!" said kid who was participating in it, but looked unsure about it.

"They're attacking a helpless cat!" gasped Star.

"Star wait!" said Marco.

She took out her wand and shouted "Rainbow Hyper Splash!"

A huge water geyser of rainbow water erupted from her wand soaking the kids.

"We're telling!" yelled one of them.

They all ran away.

Star ran over and looked at the cat.

"Oh you poor kitty!" said Star picking it up.

"I'd be careful if I were you." Said Marco.

Star noticed a Band-Aid on its forehead and pulled it off. On the cat's forehead was a yellow upturned crescent moon.

The cat suddenly jumped up onto a nearby car and stared at Star.

"Star we should hurry to school." Pointed out Marco.

"Okay!" said Star and the two headed to school.

Later after school as Marco was hanging out with other friends, Star looked around town when she saw a huge fight going on at a jewelry store.

She entered the store and looked at all of the women fighting.

"I didn't know they had places like that!" she said.

She joined in the fight and punched a random woman and gave a really hard punch to another girl.

"Ow... Star… said the girl.

"Oh hey Sabrina!" said Star, "Sorry… didn't see you there."

"It's okay… I guess you want one of the things so badly." Said Sabrina nursing a black eye.

"What things?" asked Star punching another random person.

"It's a jewelry store." Explained Sabrina, "And it's a big sale! Everything's 90% off!"

"oh… I thought it was a fighting pit!" said Star.

"I must have this Opal Ring!" yelled one woman holding up a ring with an opal in the center with two smaller blue opals on the side with smaller white stone in certain places.

"I've been trying to get at that ring all day!" yelled Sabrina going in for the attack.

"Okay… I think I'm going to go leave then…" said Star.

She left the store getting a bad feeling about it.

She headed home (which was Marco's house where she was staying while being a foreign exchange student).

She laid on her bed.

"Hello there Star!" said a voice.

Star looked up and saw the cat she saved earlier that day sitting on the balcony.

"Hi there kitty!" said Star.

The cat blinked.

"What…" said the cat.

"I didn't know cats can talk on earth! This is so amazing!" said Star running over to the cat.

"I'm not a normal cat." Said the cat, "You see…"

That was when the cat heard barking on one of the laser puppies entered the room.

"Oh are you scared of dogs?" asked Star.

"No of course not… that's…" said the cat

That was the laser shot from the puppy's eyes and the cat launch to catch the laser.

Luna blushed when she did that.

"I had no idea what came over me…" said the cat.

"Someone's instincts are showing." Teased Star.

The laser puppy's eyes once again host a beam and Luna tried to catch it.

"Okay Vanna! Now's not the time for this, the kitty wants to talk." Said Star putting the laser puppy outside the room.

"Thank you." Said Luna who was very embarrassed by what happened.

Star closed the door making sure that none of them were to enter again.

"Now as I was saying." Said the cat, "My name is Luna. And I'm here to explain something very important."

"Okay!" said Star.

"First there's something I'd like to give you!" said Luna.

She did a back flip and a golden brooch appeared, on the brooch was a crescent moon with a pink stone with four stones on the outside, one blue, one red, one green and one orange.

"Oh it's pretty but is it really me?" asked Star.

"I need you to say Moon Prism Power! Make-up!"

"Moon Prism Power! Make-up?" asked Star.

Suddenly there was a flash of light. When it cleared Star found herself where a leotard with a blue Sailor collar, a matching blue skirt, a pinkish-red ribbon on her chest where the brooch was in the center of, a match bow on her lower back, boots that matched the ribbon, long white gloves on her hand that had pinkish-red piping, a golden tiara was on her forehead, her hair was now done in a style with buns and pigtails and on her burns were pinkish-red gems.

She went over to the mirror and squeed.

"Oh my gosh!" said Star.

"Yes it is quite a lot of take it." Said Luna.

"I have the same hair style as Mina Loveberry like this." Said Star.

Luna cleared her throat, "I don't know who that is, but this your Sailor Moon form. There is an enemy you must fight and…"

However there was a light and screams coming out of one of the jewels.

"Help us please!" cried one of the voices.

"Looks like the enemy is attacking." Said Luna.

"Okay! Let's go!" yelled Star… well Sailor Moon.

"But we don't know where they are." Said Luna.

"Oh no... the jewelry store owner is turning into a monster!" cried one of the voices.

"I know where they are. Said Sailor Moon.

She grabbed Luna.

"Let's go!" yelled Sailor Moon.

She immediately jumped out the window and ran towards the jewelry Store. She noticed a horrible monster floating above them who looked like they were in some sort of coma.

She kicked open the door.

"Hey you bad guy! I'm…" said Sailor Moon then realized something and whispered to Luna, "What's my name again?"

"Sailor Moon." Sighed Luna.

"Sailor Moon! And in the name of the Moon! I'm going to kick your monster butt!" said Sailor Moon.

"I'd like to see you try!" the monster.

Sailor Moon immediately uppercutted her and then literally kicked her out of the store.

"Okay… I was no expecting that…" said the monster.

"You want to surrender?" asked Sailor Moon.

"I am not going to surrender!" said the monster, "You have given energy to the great ruler now arise my slaves!"

"What did that do?" asked Sailor Moon.

"Give it a second… you did kicked me out of the store." Said the monster.

That was when all of the women were once again up however their eyes were glowing a solid yellow.

"That can't be good." Said Sailor Moon.

All of the women started to swarm her.

"Okay… can some one help me!" called out Sailor Moon, "I'd rather not fight a bunch of brainwashed women…"

"Seriously…" said Luna face pawing.

That was when a mysterious person swooped in and rescued Sailor Moon from the swarm of brainwashed women.

"Oh thank you." Said Sailor Moon.

She saw it was a boy around her age wearing a suit, some kind of hat as well as a skull mask. She began to blush with her eyes sparkling.

"Who are you?" she asked.

"I am Skull Mask." Said the mysterious boy.

"So cool!" said Sailor Moon.

"How dare you!" yelled the monster.

The monster elongated her arm and try tried to scratch them. However Skull Mask grabbed her arm and tossed her over his shoulder.

"So cool!" said Sailor Moon in a love struck daze.

"Sailor Moon!" scolded Luna.

"What?" asked Sailor Moon.

"You have to finish the monster off." Said Luna.

"Oh right.." said Sailor Moon, "oh man! I don't have my wand though!"

"Use your tiara, throw it and say "Moon Tiara Action!"" said Luna.

Sailor Moon grabbed her tiara, which began to glow. She then shouted "Moon Tiara action!"

The tiara glowed bright yellow and aimed or the monster, turning her to into dust.

"All right! That was awesome! Wasn't it Skull Mask?" asked Sailor Moon.

She realized he was gone.

"Oh…" she pouted.

Luna just sighed.

Thankfully the women were also snapped out of their brainwashing.

"What happened?" asked one woman.

"Why am I in them idle of the street." Said another.

"all right! A job well done!" cheered Sailor Moon.

Luna jumped on her shoulder.

"We really should get out of here." She whispered.

"Why?" asked Sailor Moon.

Then she noticed that a lot of people were gathering, several taking pictures with their phones.

"Is that a bad thing?" asked Sailor Moon .

"Just leave." sighed Luna.

They got back to the Diaz house.

"All right focus back." Said Luna.

"Okay!" said Sailor Moon who turned back to being Star, "That was so awesome! Oh man! I can't wait to tell everyone!"

"You can't." said Luna.

"What? Why?" asked Star.

"What we're doing is really dangerous. If our enemy finds out who you are it could put every you care about in danger." Said Luna.

Before Star could respond, Marco entered the room.

"Hey! I was wondering if you heard anything about a mysterious blond girl fighting a monster?" asked Marco giving her a suspicious look.

"No… of course not…" said Star who was clearly lying.

"Seriously?" asked Marco.

Star looked at Luna.

"I have to talk to you in the hallway." Said Star.

She closed the door.

"What's going on Star?" asked Marco.

"Okay, remember that cat we found today? Well it turns she can talk and she game me this brooch that whenever I said "Moon Prism Power! Make-Up!"…" said Star accidentally transforming into Sailor Moon, "I turn into a super hero! Like this! But you can let her know I told you! I don't know her well but she's almost as bad a my mom."

Marco's eye twitched, "Okay… is this a Mewni thing?" he asked.

She de=-transformed once again.

"Nope… seems to just be an earth thing…" said Star.

"Seriously Star?" asked Luna who had managed to open the door, "You couldn't even wait a minute?"

"Hey! Marco already helps me fight monsters!" said Star.

"What…" said Luna.

That was when they heard Star's nemesis Ludo call out "Star Butterfly! You better hand over the wand right now!"

"You ready to fight monsters?" asked Marco.

"You know it!" said Star twirling her wand.

They ran to fight the smothers, Luna watched from Star's windows with her eye twitching.

"What have I gotten myself into." Muttered Luna.

Little did Luna know that it was going to be become more complicated… after all she didn't know where Star was from or who she was.

All she knew was that the fight was just begging… and it was going to be an interesting fight with the enemy.

Next Time: Marco realizes that Star might also have to tell her mom about the whole Sailor Moon thing with the whole Saint O's thing looming over her head. . But will Luna relent on this one? Find out next time!

A/N: A few things I have to bring up now. Yes Skull Mask is Marco... and much like the anime he has no idea he's doing it. Also Sabrina is going to be an energy target every chapter during the Jadeite arc and of the first during the Nephrite arc.