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Description
It was just another quiet evening in the Loud House and while the majority of the family were downstairs enjoying whatever Saturday night entertainment was showing, the family's resident scientist was busy tinkering with something her room. Sparks danced about her worktop as she hunched over whatever it was she was working on before she gasped and leaned back, an atomic green glow illuminating her face as she lifted her goggles.

"...I did it..." She whispered as she looked over the data on her computer and drawing board to confirm and a mad grin of joy spread across her face. "By great
Hawking's ghost, I've done it! I'm brilliant, brilliant, brilliant I tell you! Genius, I say!" She cheered beginning to break dance victoriously about her and Lily's room.

"Lisa! Everything alright up there?" She stopped celebrating when she heard Rita calling.

"Yes, Mother, I'm just happy my latest experiment is a success, nothing to worry about."

"Alright, honey. By the way the final round of Dessert War is about to start if you want to join us. Lincoln made his famous strawberry muffins for the occasion."

"I'll be right down." the little Einstein called back. "I think a celebratory treat is definitely in order after this accomplishment." She added to herself.

"And for tomorrow, your moment shall come my beautiful magnum opus." She beamed at her creation before going to join her family, leaving the mysterious device glowing on her desk.

XXX

The next morning, after breakfast, Lisa gathered her siblings in her room to inform them of her accomplishment.

"So what's this thing you wanted to show us, Lisa?" Lori asked. "Not another set of your gross sample collections I hope."

"Oh pshaw! This is far greater than anything in that field could ever be. We're talking about the discovery of a lifetime! The changing of fiction to fact! Fantasy becoming reality, baby!"

"Can we get to the point already?!" Lola asked impatiently.

"Sorry, got carried away there." Lisa cleared her throat. "Siblings. Have any of you heard of the multiverse theory?" Lincoln raised his hand while a few others wiggled their own.

"The theory that every conceivable reality exists in its own universe including those from works of fiction." Lincoln answered.

"Yes exactly, thank you, Lincoln." Lisa smiled.

"It pays to enjoy scifi." Her brother grinned.

"So what if there were a way to access these universes and explore them in all their splendour?" Lisa continued as she went to her desk and picked up her creation before presenting it to her audience.

It looked like a wrist mounted TV remote with a miniature satellite dish and a pair of antenna at the end along with a large green panel in the centre.

"Behold! My Multiverse Traversing Device, or MTD for short."

"Isn't that the old remote Lily threw in the toilet?" Lola pointed out.

"Poo-poo." Lily giggled while Lisa grimaced.

"Yes, it was. But after excessive sterilisation and recalibration it has been figuratively reborn for a much greater and higher purpose than it's original creator could have ever given it in it's previous quote unquote life." Whilst the twins, Leni, Lucy and Lincoln seemed intrigued the other siblings weren't quite as convinced by Lisa's proclamation.

"Ok, Lisa, I know you've never been one for jokes so don't be upset that this one isn't very funny." Said Luan.

"Yeah, brah, I know technology's come a long way but multiple universes? That's just bogus." Luan doubted.

"If that's all you have to say I literally have better things to do than humour you." Lori said cynically. Lisa sighed irritated but understanding.

"I'm not suprised you find it hard to believe, Elder Sisters. I admit my younger self would have scoffed at the concept as well."

"How younger? Like, still in Mom's womb?" Luan asked earning some rare laughs from her siblings.

"Har, proverbial Har." Lisa rolled her eyes. "I guess I'll just have to prove it." She added before she pressed a button on the device and the room was engulfed by a flash of green light.

When it faded Lisa was still standing there but she wasn't alone. Sitting beside her was what looked a large blue furball with a single antenna on its head, stubby feet and large staring eyes. The other siblings stared at the strange creature before a large set of fangs suddenly split across its face and it snarled at the group and pounced at them.

The kids screamed before the creature was zapped by a ray gun Lisa pulled from her pocket knocking it out before using the MTD to make it disappear.

"Ok, that creature wasn't as harmless as it appeared to be. Dully noted."

"What the heck was that thing?!" Lori demanded.

"Short term: an alien from another world. Apparently it's a pet where it comes from."

"I saw death in its eyes." Lucy murmured fearfully.

"Do you believe me now?" Lisa asked. The siblings nodded slowly.

"Ok, so the multiverse theory is true and you've invented a means to access it. Good for you, another Nobel prize to add to the pile." Lori muttered.

"Oh I don't intend on submitting this invention yet. The public aren't ready for such technology."

"With creatures like that man eating dust bunny out there I agree." Lola whimpered.

"However," Lisa continued. "That doesn't mean we can't partake in the fruits of my invention."

"What are you suggesting?" Lincoln inquired.

"I'm saying, dear Brother, that we go on a expedition to one of these other universes. Preferably one without 'man eating dust bunnies' as Lola put it."

"You want us to join you on some crazy journey literally into the unknown?!" Lori said aghast.

"Well I certainly can't go alone; Not without raising suspicion. Plus, I'm certain the experience would be a lot more fulfilling with your 'creative input' shall we say."

The siblings thought about Lisa's proposition. While the vastness of the multiverse was intimidating it was also equally inviting.

"This would only be a temporary trip right?" Asked Lori.

"If we're doing this we want you to be sure we can come back without any mix ups." Lynn added.

"Was my previous demonstration not good enough?" Lisa piped up, her siblings realising she would have had to make a journey to another world and back again.

"Well...I suppose it couldn't hurt to try. It certainly seems like one of your better put together inventions." Lori tentatively agreed. "Are the rest of you guys up for this?" The remaining Louds nodded.

"Excellent." Lisa smiled. "Before we begin however, you should know that traversing to a different universe may likely bring about some...alterations in our chemical makeup throughout the duration of our occupation of said universe."

"English?" Lynn asked on behalf of the others.

Lisa groaned. "Depending on the universe we visit our bodies may undergo transformations." Her siblings looked amongst each other curious but slightly concerned as well.

"What kind of transformations are we talking about here?" Lincoln asked.

"For example," Lisa began. "If we were to travel to a world where every occupant's form were made up from vegetation, we too would assume the same form as the dominant species."

"You mean if we went to a world where everyone was a plant we'd become plants as well?" Lincoln simplified.

"Only for as long as we were there, yes." Lisa confirmed. The Louds were now more curious than ever as they started to imagine.

"So...if we went to a world run by animals we'd turn into animals?" Lana suggested.

"Or vampires if we went to the world of Melancholia?" Lucy asked hopefully.

"Or we'd gain superpowers in a world full of metahumans?" Lincoln grinned ecstatically.

"In other words, the possibilities are literally endless." Lori tested.

"...Yes. That's, exactly right." Lisa verified, surprised by the simple yet logically solid statement.

"Then I say let's go for it!" Lynn said eagerly.

"Hold on!" Lori realised something. "Say something goes wrong and we get held up in one of these other worlds. Mom and Dad will freak out wondering where we are or if we got kidnapped or worse."

"Fear not, Eldest Sister, I have taken that factor into account as well." Lisa reassured. "You see prior to this meeting I had, without your knowledge, tagged you with a special kind of chip connected to the Warper-" Immediately her siblings started ranting about the tagging.

"Calm down, it's for safety, let me explain! Some time ago I accepted an invitation from some of the most brilliant minds of the scientific community to come and live in their organisation in order to get some 'peace and quiet' as you say."

"But, we don't remember you leaving home for something like that. Or is that just me?" Leni wondered.

"No you're right, Leni, I don't recount that happening either." Lori added.

"You wouldn't. Because while it was enjoyable at first to have so much time to focus on my studies without any disruption, I soon realised I just wasn't happy there without my family. That and their idea of dessert is an ice cream injection."

"Awwwww, Lisa~!" Her siblings gushed as they pulled her into a group hug making her blush furiously.

"Yes-yes-yes-yes, I love you all!" She said frantically squirming away to straighten her ruffled hair. "But while I wanted to come home I didn't want to go back on the community's offer for fear they'd lose respect for me. So...I discovered the equation for time travel."

"You...you what?" Lincoln gaped along with his sisters.

"I learned how to time travel." Lisa repeated. "I found the equation, built a time machine and sent my conscience back to my body before I accepted the invitation and politely declined, thus keeping my respect with the scientists intact and my place where I belong with all of you." Now while the concept of time travel sounded ridiculous, both the revelation of the Warper and the fact that this was coming from Lisa had the siblings somewhat conflicted.

"Can you prove this?" Lori asked.

"Why do you think there hasn't been any explosions lately?" Lisa questioned. "I've been going back before every mistake in my experiments in order to prevent them. I once blew the entire side of the house off before going back to correct my error. It's thanks to that I've been able to produce this device at all without any permanent collateral damage."

"Great Scott!" Luan gasped. "This is heavy."

Lincoln directed the conversation back to the original question. "So how does this account for leaving home without worrying our parents?"

"You see, Brother, by analysing my equation and...the fictional possibilities of the Professor How series you and Luna enjoy, I found a way to not only go back in time but freeze our time here." Lincoln and Luna's eyes widened at the mention of their favourite British scifi show.

"You mean...the MTD is quantum locked?" Lincoln asked in disbelief to which Lisa nodded with a grin.

"You're a mad genius, Lis." Luna exclaimed.

"Hello, the rest of us don't speak nerd." Lynn reminded the three.

"To translate the fictional term our brother spoke, the MTD is capable of preventing the flow of time around itself as long at it remains absent. The chips I've implanted us with are connected to it and function the same way. As long as we're not in our own reality we cannot age within it. So even if we were to stay in one of the worlds we traveled to until we were as old as Pop Pop, as soon as we returned home our time would be set back to when it was originally frozen from when we left."

The other sisters tried to process the information as best they could until Leni spoke up.

"Ooh, ooh Lori, it's like in that story Mom used to read to us about the magic closet and the Tiger Queen."

"Hey that's right." Lori realised. "The kids in that story stayed in the world until they were grown up but when they returned home they were kids again."

"Another apt comparison." Lisa agreed. "It seems works of fiction have more place in science than I originally thought."

"Oh, I get it. You were only gone for a second when you went to get that alien but to you it could have been days or weeks." Lynn realised.

"Four days to be precise." Lisa confirmed the athlete's wager. "However, don't think this makes us indestructible. If we were to die outside our universe we wouldn't be able to return. We would simply vanish so we must be still be careful."

"So when we choose to come back, no time will have passed here and we'll be the same age we were when we left." Lori double checked.

"Precisely." Lisa replied.

"Well what're we waiting for, dudes?! Let's go have an adventure!" Luna grinned.

"YEAH!" The others cheered together.

"Fire it up, Lis!" Said Lincoln. Lisa nodded before pressing a button on the MTD causing the panel to glow and bolts of green lighting to leap out from the antenna engulfing each of the children as they began to dematerialise.

"This is gonna be out of this world! Hahaha!" Luan quipped. "Get it~ get it~ get it~?" her voice echoed out as they disappeared completely. They were off.

The Journey Begins...

Description
It was just another quiet evening in the Loud House and while the majority of the family were downstairs enjoying whatever Saturday night entertainment was showing, the family's resident scientist was busy tinkering with something her room. Sparks danced about her worktop as she hunched over whatever it was she was working on before she gasped and leaned back, an atomic green glow illuminating her face as she lifted her goggles.

"...I did it..." She whispered as she looked over the data on her computer and drawing board to confirm and a mad grin of joy spread across her face. "By great
Hawking's ghost, I've done it! I'm brilliant, brilliant, brilliant I tell you! Genius, I say!" She cheered beginning to break dance victoriously about her and Lily's room.

"Lisa! Everything alright up there?" She stopped celebrating when she heard Rita calling.

"Yes, Mother, I'm just happy my latest experiment is a success, nothing to worry about."

"Alright, honey. By the way the final round of Dessert War is about to start if you want to join us. Lincoln made his famous strawberry muffins for the occasion."

"I'll be right down." the little Einstein called back. "I think a celebratory treat is definitely in order after this accomplishment." She added to herself.

"And for tomorrow, your moment shall come my beautiful magnum opus." She beamed at her creation before going to join her family, leaving the mysterious device glowing on her desk.

XXX

The next morning, after breakfast, Lisa gathered her siblings in her room to inform them of her accomplishment.

"So what's this thing you wanted to show us, Lisa?" Lori asked. "Not another set of your gross sample collections I hope."

"Oh pshaw! This is far greater than anything in that field could ever be. We're talking about the discovery of a lifetime! The changing of fiction to fact! Fantasy becoming reality, baby!"

"Can we get to the point already?!" Lola asked impatiently.

"Sorry, got carried away there." Lisa cleared her throat. "Siblings. Have any of you heard of the multiverse theory?" Lincoln raised his hand while a few others wiggled their own.

"The theory that every conceivable reality exists in its own universe including those from works of fiction." Lincoln answered.

"Yes exactly, thank you, Lincoln." Lisa smiled.

"It pays to enjoy scifi." Her brother grinned.

"So what if there were a way to access these universes and explore them in all their splendour?" Lisa continued as she went to her desk and picked up her creation before presenting it to her audience.

It looked like a wrist mounted TV remote with a miniature satellite dish and a pair of antenna at the end along with a large green panel in the centre.

"Behold! My Multiverse Traversing Device, or MTD for short."

"Isn't that the old remote Lily threw in the toilet?" Lola pointed out.

"Poo-poo." Lily giggled while Lisa grimaced.

"Yes, it was. But after excessive sterilisation and recalibration it has been figuratively reborn for a much greater and higher purpose than it's original creator could have ever given it in it's previous quote unquote life." Whilst the twins, Leni, Lucy and Lincoln seemed intrigued the other siblings weren't quite as convinced by Lisa's proclamation.

"Ok, Lisa, I know you've never been one for jokes so don't be upset that this one isn't very funny." Said Luan.

"Yeah, brah, I know technology's come a long way but multiple universes? That's just bogus." Luan doubted.

"If that's all you have to say I literally have better things to do than humour you." Lori said cynically. Lisa sighed irritated but understanding.

"I'm not suprised you find it hard to believe, Elder Sisters. I admit my younger self would have scoffed at the concept as well."

"How younger? Like, still in Mom's womb?" Luan asked earning some rare laughs from her siblings.

"Har, proverbial Har." Lisa rolled her eyes. "I guess I'll just have to prove it." She added before she pressed a button on the device and the room was engulfed by a flash of green light.

When it faded Lisa was still standing there but she wasn't alone. Sitting beside her was what looked a large blue furball with a single antenna on its head, stubby feet and large staring eyes. The other siblings stared at the strange creature before a large set of fangs suddenly split across its face and it snarled at the group and pounced at them.

The kids screamed before the creature was zapped by a ray gun Lisa pulled from her pocket knocking it out before using the MTD to make it disappear.

"Ok, that creature wasn't as harmless as it appeared to be. Dully noted."

"What the heck was that thing?!" Lori demanded.

"Short term: an alien from another world. Apparently it's a pet where it comes from."

"I saw death in its eyes." Lucy murmured fearfully.

"Do you believe me now?" Lisa asked. The siblings nodded slowly.

"Ok, so the multiverse theory is true and you've invented a means to access it. Good for you, another Nobel prize to add to the pile." Lori muttered.

"Oh I don't intend on submitting this invention yet. The public aren't ready for such technology."

"With creatures like that man eating dust bunny out there I agree." Lola whimpered.

"However," Lisa continued. "That doesn't mean we can't partake in the fruits of my invention."

"What are you suggesting?" Lincoln inquired.

"I'm saying, dear Brother, that we go on a expedition to one of these other universes. Preferably one without 'man eating dust bunnies' as Lola put it."

"You want us to join you on some crazy journey literally into the unknown?!" Lori said aghast.

"Well I certainly can't go alone; Not without raising suspicion. Plus, I'm certain the experience would be a lot more fulfilling with your 'creative input' shall we say."

The siblings thought about Lisa's proposition. While the vastness of the multiverse was intimidating it was also equally inviting.

"This would only be a temporary trip right?" Asked Lori.

"If we're doing this we want you to be sure we can come back without any mix ups." Lynn added.

"Was my previous demonstration not good enough?" Lisa piped up, her siblings realising she would have had to make a journey to another world and back again.

"Well...I suppose it couldn't hurt to try. It certainly seems like one of your better put together inventions." Lori tentatively agreed. "Are the rest of you guys up for this?" The remaining Louds nodded.

"Excellent." Lisa smiled. "Before we begin however, you should know that traversing to a different universe may likely bring about some...alterations in our chemical makeup throughout the duration of our occupation of said universe."

"English?" Lynn asked on behalf of the others.

Lisa groaned. "Depending on the universe we visit our bodies may undergo transformations." Her siblings looked amongst each other curious but slightly concerned as well.

"What kind of transformations are we talking about here?" Lincoln asked.

"For example," Lisa began. "If we were to travel to a world where every occupant's form were made up from vegetation, we too would assume the same form as the dominant species."

"You mean if we went to a world where everyone was a plant we'd become plants as well?" Lincoln simplified.

"Only for as long as we were there, yes." Lisa confirmed. The Louds were now more curious than ever as they started to imagine.

"So...if we went to a world run by animals we'd turn into animals?" Lana suggested.

"Or vampires if we went to the world of Melancholia?" Lucy asked hopefully.

"Or we'd gain superpowers in a world full of metahumans?" Lincoln grinned ecstatically.

"In other words, the possibilities are literally endless." Lori tested.

"...Yes. That's, exactly right." Lisa verified, surprised by the simple yet logically solid statement.

"Then I say let's go for it!" Lynn said eagerly.

"Hold on!" Lori realised something. "Say something goes wrong and we get held up in one of these other worlds. Mom and Dad will freak out wondering where we are or if we got kidnapped or worse."

"Fear not, Eldest Sister, I have taken that factor into account as well." Lisa reassured. "You see prior to this meeting I had, without your knowledge, tagged you with a special kind of chip connected to the Warper-" Immediately her siblings started ranting about the tagging.

"Calm down, it's for safety, let me explain! Some time ago I accepted an invitation from some of the most brilliant minds of the scientific community to come and live in their organisation in order to get some 'peace and quiet' as you say."

"But, we don't remember you leaving home for something like that. Or is that just me?" Leni wondered.

"No you're right, Leni, I don't recount that happening either." Lori added.

"You wouldn't. Because while it was enjoyable at first to have so much time to focus on my studies without any disruption, I soon realised I just wasn't happy there without my family. That and their idea of dessert is an ice cream injection."

"Awwwww, Lisa~!" Her siblings gushed as they pulled her into a group hug making her blush furiously.

"Yes-yes-yes-yes, I love you all!" She said frantically squirming away to straighten her ruffled hair. "But while I wanted to come home I didn't want to go back on the community's offer for fear they'd lose respect for me. So...I discovered the equation for time travel."

"You...you what?" Lincoln gaped along with his sisters.

"I learned how to time travel." Lisa repeated. "I found the equation, built a time machine and sent my conscience back to my body before I accepted the invitation and politely declined, thus keeping my respect with the scientists intact and my place where I belong with all of you." Now while the concept of time travel sounded ridiculous, both the revelation of the Warper and the fact that this was coming from Lisa had the siblings somewhat conflicted.

"Can you prove this?" Lori asked.

"Why do you think there hasn't been any explosions lately?" Lisa questioned. "I've been going back before every mistake in my experiments in order to prevent them. I once blew the entire side of the house off before going back to correct my error. It's thanks to that I've been able to produce this device at all without any permanent collateral damage."

"Great Scott!" Luan gasped. "This is heavy."

Lincoln directed the conversation back to the original question. "So how does this account for leaving home without worrying our parents?"

"You see, Brother, by analysing my equation and...the fictional possibilities of the Professor How series you and Luna enjoy, I found a way to not only go back in time but freeze our time here." Lincoln and Luna's eyes widened at the mention of their favourite British scifi show.

"You mean...the MTD is quantum locked?" Lincoln asked in disbelief to which Lisa nodded with a grin.

"You're a mad genius, Lis." Luna exclaimed.

"Hello, the rest of us don't speak nerd." Lynn reminded the three.

"To translate the fictional term our brother spoke, the MTD is capable of preventing the flow of time around itself as long at it remains absent. The chips I've implanted us with are connected to it and function the same way. As long as we're not in our own reality we cannot age within it. So even if we were to stay in one of the worlds we traveled to until we were as old as Pop Pop, as soon as we returned home our time would be set back to when it was originally frozen from when we left."

The other sisters tried to process the information as best they could until Leni spoke up.

"Ooh, ooh Lori, it's like in that story Mom used to read to us about the magic closet and the Tiger Queen."

"Hey that's right." Lori realised. "The kids in that story stayed in the world until they were grown up but when they returned home they were kids again."

"Another apt comparison." Lisa agreed. "It seems works of fiction have more place in science than I originally thought."

"Oh, I get it. You were only gone for a second when you went to get that alien but to you it could have been days or weeks." Lynn realised.

"Four days to be precise." Lisa confirmed the athlete's wager. "However, don't think this makes us indestructible. If we were to die outside our universe we wouldn't be able to return. We would simply vanish so we must be still be careful."

"So when we choose to come back, no time will have passed here and we'll be the same age we were when we left." Lori double checked.

"Precisely." Lisa replied.

"Well what're we waiting for, dudes?! Let's go have an adventure!" Luna grinned.

"YEAH!" The others cheered together.

"Fire it up, Lis!" Said Lincoln. Lisa nodded before pressing a button on the MTD causing the panel to glow and bolts of green lighting to leap out from the antenna engulfing each of the children as they began to dematerialise.

"This is gonna be out of this world! Hahaha!" Luan quipped. "Get it~ get it~ get it~?" her voice echoed out as they disappeared completely. They were off.

The Journey Begins...