AN: So, it has been awhile, but I'm finally ready to get back to writing my crossover fanfic! Thank you to everyone for your patience and I hope you would like the new chapter of this story! It is now time to see what world Molly and Libby would be visiting next!

Chapter 6

Echo Creek

After their adventure in Gravity Falls, Molly and Libby guided their gummi ship through space, in search of their next world.

As Molly took control of Mollibby, she noticed that Libby was deep in thought about something. Curious, Molly decided to ask Libby what she was thinking about.

"Is something on your mind, Libby?"

At that moment, Libby brought her attention to Molly. "Kind of. I'm glad that we managed to save Gravity Falls after defeating Bill, but I just can't stop thinking about that mysterious old man! How do you think he was able to bring back Bill?"

"He must have been using the power of darkness to bring Bill back to life." Molly guessed. "On the bright side, that old man shouldn't cause trouble for Gravity Falls anymore! Let's just hope we won't have to see him again!"

After controlling the gummi ship for awhile, Molly found another world, so she began to land the ship.

As Molly and Libby took a look around at this new world, they realized that it was just a normal looking town that reminded them of Brighton. There was nothing out of the ordinary about this town, so Molly and Libby started to think that this world might actually be peaceful.

They were soon proven wrong when they heard roars in the distance along with a bunch of flashing lights.

"What was that?" Libby asked, trying to figure out what she just saw. "Do you think it was the Heartless?"

"Maybe. It looks like someone needs out help! Let's go, Libby!"

Summoning their keyblades, Molly and Libby rushed over towards where they heard the commotion. They climbed a nearby fence and took a peek, expecting to see the Heartless, but they somehow found something even stranger.

Right behind the fence was an army of monsters. While it wasn't the Heartless, Molly and Libby knew that the monsters were causing trouble as well.

It wasn't long before Molly and Libby realized that the monsters were fighting someone. Right in front of the monster army stood a 14 year old girl with long blond hair and a wand in her hand, along with a Latino-American boy in a red hoodie who looked to be the same age as the girl.

"Uh, Star? More of them are coming!" the boy was fighting back with karate as more monsters started to surround him.

"Don't worry, Marco! I got this!" the girl named Star assured before aiming her wand at the monsters. "Rainbow blast!"

The moment Star said that, a beam of rainbows fired through her wand, knocking out some of the monsters. Seeing this surprised Molly and Libby. It seemed that they weren't the only ones who were able to use magic.

The battle went on until Star and Marco slowly started to get overwhelmed by the monster army. Once Star and Marco were completely surrounded, a tiny bird-like creature stepped forward. The bird wore a dark green cloak and a skull on his head as a crown, so Molly and Libby assumed that he was the leader of the monsters.

"Give it up, Star Butterfly! There is no escape for you or your friend! This time, the wand is mine!" The bird-like creature gloated.

"Yeah right, Ludo! You always say that, and Marco and I end up beating you and your army like we always do!" Star pointed out.

"Not this time! In case you haven't noticed, my army has you completely surrounded!" Ludo laughed.

As much as they didn't want to admit it, Star and Marco knew that Ludo was right. They were both pretty worn out by this point.

Before the monsters could make another move, Molly and Libby jumped in, keyblades in their hands. This caused the monsters to back up in surprise.

"What the?" Ludo was shocked to see two unexpected intruders.

As Molly and Libby raised their keyblades in defense, they turned to Star and Marco to make sure they were okay.

"Are you two okay?" Libby asked.

"Libby and I would be happy to help you out!" Molly said.

"Really? Thanks!" Star thanked, grateful for the help.

"Star and I appreciate the help!" Marco said with a smile.

With a growl, Ludo was ready to attack once more. "It doesn't matter how much help you get! Monster army, get the wand!"

As the monsters closed in, Molly and Libby swung their keyblades at them. This gave Star and Marco the opportunity to fight back as Star blasted the monsters with her magic and Marco beat them up with his karate moves.

More and more monsters were knocked out every passing minute as Ludo started to get more frustrated.

"Why are you idiots letting yourselves get defeated so easily? Beard Deer! Spikeballs! Man Arm! Lobster Claws! Anyone, just grab the wand!" Ludo yelled, losing his patience with his monster army. Seeing that he was running out of options, Ludo decided to send one more monster to get the wand. "Buff Frog! You take the wand!"

"Yes, Master Ludo!" Buff Frog agreed before jumping into battle.

As he got ready to fight the group of friends, Buff Frog sent a couple of punches flying towards Molly and Libby, to which they easily blocked with their keyblades. With Buff Frog momentarily distracted, this gave Star the opportunity to blast him with a narwhal blast.

With the rest of Ludo's army defeated, Ludo knew that he was defeated once again. With a sigh, Ludo opened a portal to another dimension to retreat.

"Alright, morons! You know the drill!" Ludo said as his monster army retreated through the portal.

The last monster to stick around was a reptile-like creature in a business suit named, Toffee. Toffee gazed at the monster army with indifference as they entered the portal one by one.

"Such a shame. It seemed that your army was going to succeed this time." Toffee said in a calm voice.

"Well, welcome to my life, Toffee!" Ludo grumbled. "We probably would have won if those other humans didn't interfere."

It was at that moment when Toffee glanced at Molly and Libby, who were celebrating their victory with Star and Marco. He found himself to be intrigued by the keyblades Molly and Libby held in their hands.

"Perhaps those two humans would make things a little more interesting!" Toffee said to himself before following Ludo into the portal as it disappeared.

Once the monsters were gone, everyone took a moment to catch their breaths.

"Whew! Fighting Ludo's army has been a little tough this time. Thanks for helping us out!" Marco thanked, bringing his attention to Molly and Libby.

"Don't mention it! Those monsters were pretty scary though." Libby commented.

"You were amazing with that wand! Where did you get it?" Molly asked Star.

"Oh, this wand is a family heirloom that has been passed down for generations! I am Star Butterfly, a magical princess from another dimension!" Star introduced.

Hearing this surprised Molly and Libby. They never would have guessed that they would meet a real life princess.

"Wait, you are a princess?" Libby asked, surprised.

"And you came from another world?" Molly jumped in.

Star nodded. "Yes! I am the princess of Mewni, and this is my best friend, Marco Diaz!" Star introduced Marco.

"It's nice to meet you two! I am Molly McGee, and this is my best friend, Libby Stein-Torres!" Molly introduced as she wrapped an arm around Libby's back, causing Libby to give a shy smile.

"So, where did those monsters come from?" Libby asked. "You must have been so scared to fight a whole army of them."

"Nah! They come here all the time!" Star explained. "Marco and I are kind of used to it!"

"So, neither of you have seen any shadow like creatures around here?" Molly asked.

"Not that we know of." Marco replied.

Soon, Molly and Libby sighed in relief. It seems that the Heartless hadn't come to this world yet.

"So, it has been a long day, would you two like to come inside?" Marco asked.

"Sure! After that fight with those monsters, Libby and I can really get some rest!" Molly explained.

As Molly and Libby followed Star and Marco in the house, they ended up meeting Marco's parents, Rafael and Angie. The moment Molly and Libby were invited in the house, Marco's parents have been very hospitable to them. Marco's parents provided them with snacks, and Molly and Libby soon learned that they were in a town called, Echo Creek.

"It's so good to know that Marco is making new friends!" Rafael smiled. "Where are you two from?"

Molly and Libby soon glanced at one another as they didn't know how to answer.

"Um, let's just say that Libby and I are from somewhere really far away from here!" Molly explained.

"Oh no. You two must be really exhausted. Why don't you stay here for awhile?" said Angie.

Surprised by this, Libby replied, "Wait, you two are really fine with inviting two strangers you just met into your house?"

"Of course! We already have one person from far away living with us! What's two more?" said Rafael.

"Well, thank you, Mr. and Mrs. Diaz! I think I can get used to staying here for awhile! These laser puppies are just so adorable!" Molly exclaimed as she started to pet the puppies that were created by Star. She didn't even mind that lasers were being fired from their eyes.

Later that night, Molly and Libby decided that it was time to get some rest. After using the bathroom and getting changed into her pajamas, Molly decided to go to bed. She walked through the hallway before taking notice of Star.

"Hi, Star!" Molly gave a friendly wave to Star.

Star then took notice of Molly and smiled back. "Hi, Molly! How are you and Libby liking the Diaz household?"

"We love it! We can't thank you and the Diazs enough for letting us stay here!" Molly answered with a grateful smile.

"It's the least we could do! You and Libby did help me and Marco out with fighting those monsters. So, you once told me that you and Libby are dating, right?" Star asked.

Molly nodded. "Yes. Libby and I have been together for several months and we enjoyed every second of being together!"

"Aww! That's so cute!" Star was happy for Molly.

"So, do you have someone special in your life, Star?" Molly asked. "Are you and Marco together?"

At that moment, Star began to blush from being asked that question.

"No! No! No! Marco and I are just friends!" Star replied with a nervous smile.

Molly could tell from Star's nervous expression that she was lying, or at the very least had some feelings towards her best friend, but Molly decided not to pry into Star's personal life.

"Okay! I believe you! Anyway, Libby and I had better get some sleep! We'll see you in the morning!" Molly waved goodbye.

"Okay! Goodnight, Molly!" Star said before going back to her room.

At that moment, Molly walked further down the hall. There, she found Libby speaking to Rafael and Angie before Libby noticed her girlfriend.

"Hi, Molly! Mr. and Mrs. Diaz said that this is where we would be sleeping tonight!" Libby explained as she gestured towards a nearby door.

As they opened the door, Molly and Libby were surprised to see that there was a single bed in the room. The girls blushed slightly, knowing that they would both have to sleep in the same bed together.

"Uh, is this the only bed in the room?" Libby asked.

Rafael nodded. "We unfortunately could only afford one bed for this room."

"Sorry." Angie apologized. "With Star living here too, this is the last guest bedroom we have."

"No, it's alright!" Molly assured, not wanting to seem ungrateful. "Libby and I really appreciate you letting us stay here!"

"Just let us know if you need anything else!" Rafael said before he and Angie returned to their room.

As Molly and Libby laid down on the bed next to each other, they turned off the lights, leaving the moonlight from outside the only source of light in the room. Once Molly took a look at Libby, she couldn't help but think of how beautiful Libby looked under the moonlight. Libby felt the same way about Molly as they both began to blush.

"So, do you think we would find the keyhole in this town, Libby?" Molly asked as she was getting desperate for a conversation topic.

"I'm not sure, Molly. There are no Heartless here, so I think Echo Creek is safe. Maybe tomorrow, we can visit Star's home world, Mewni!" Libby suggested.

"That sounds like a good idea!" Molly agreed. "Let's just get some sleep for now."

Libby nodded. "You're right! I love you, Molly!"

"I love you too, Libby!" Molly smiled.

Soon, Molly and Libby kissed each other on the lips as they wished each other a good night. They both then drifted off to sleep as they got ready for their new adventure tomorrow.

AN: So, for those who are wondering, since season 1 of Star vs the Forces of Evil is my favorite season of the show, these next couple of chapters would take place during the events of the first season. Also, fun fact, Star vs the Forces of Evil is the show that got me interested in shipping since I always liked the idea of Star and Marco as a couple. I plan to include both Mollibby moments and Starco moments for the next couple of chapters, so I think it would be pretty interesting to be writing about one of my first OTPs, along with my current OTP!