I don't own Harry Potter or Code Lyoko Evolution

Mrs Einstein

"A equals times…. Times R… er…" Harry watched Jeremy with a supressed groan. He knew it was a bad idea to let him stay up so late. Jeremy rubbed the board clean.

"No, no, sorry. I forgot the mass. So it makes A equals…."

A blonde girl raised her hand.

"Laura."

She took over from Jeremy. Harry stared at her before shrinking his head.

"So, I'll write out A equals the mass of s times R squared which means when converting with the numerical equivalent of the square root of six point sixty seven times ten raised to the negative eleventh power. Which gives us the result of twenty nine point seven kilometres per second."

Harry raised an eyebrow.

Later

"Come on Einstein, stop sulking. It's not that bad to be humiliated in front of your girlfriend," said Odd as he sat down.

"I don't think Jeremy's in the mood for it Odd," said Harry with a groan before pulling out his laptop and starting to program.

"Odd! Don't listen to him Jeremy. You know, one's neuron number doesn't really matter," said Aelita as she sat down.

"Yeah, I know. Anyway, that calculation was easy. Just had a memory lapse, that's all."

"Yeah, that explains everything," said Odd.

"Wish I could have a memory lapse," said Harry wistfully.

"Stop that." Aelita reached over and slapped Harry's head. "If you did, you wouldn't be the Harry we know and love."

"Odd, I spent the week programming the virtual vehicle that will let you go to the cortex without getting squashed," said Jeremy. "I'm allowed to be a bit tired."

"Hey, what are you talking about?" asked Laura as she walked over.

"Nothing…"

"What's that?" Laura peeked over Harry's shoulder. "That looks really advanced. Can I have a closer look?"

"No, sorry. It's a secret until the game gets released." Harry closed the program down.

"Wait a minute. Your name is Harry Stern, right?" Harry groaned.

"Please, don't fan girl over me. Sure, I'm clever but I've got a girlfriend."

"I've seen your games. I didn't know that you were my age until I read it in the newspaper. Anyway, I heard you were going to program a virtual vehicle in the cortex. Is that a new online game?"

"Yeah. We're planning to make one," said Jeremy quickly.

"I knew it. I love video games. Well, I'm not actually playing them but programming them. That's it. I'm good at computer science. That's why I'm interested in Harry here. For that matter, I love all our science classes. Just like you do actually. Except that I don't fail when solving such easy exercises."

Harry slammed his head against the wall. "Fan girl. Knew it. And Jeremy is just tired. He's been staying up too late."

"Harry." Jeremy nudged him.

"Well, see you in the library."

She walked off.

"I'm getting a bad vibe from her," said Harry as he watched her go. "She's going to cause trouble. I know it."

"Who does she think she is?" asked Odd.

"A female Jeremy. Great. Or worse, a female Harry."

"I doubt she has an artificial intelligence after her intent on taking over her body and using her powers to rule the world," said Sissi.

"You're going to have to get used to it," continued Odd. "Aelita, you're not the only Mrs Einstein anymore."

Later

"Hey." William and Yumi walked over. "What's up Jeremy?"

"There's a new girl in our class," explained Harry. "Her name's Laura Gauthier and she showed up Jeremy as he couldn't answer a question because he's tired."

"Could we please talk about the Cortex?" asked Jeremy.

"You've got news?" asked Yumi.

"Yeah. I managed to get some data last time. You remember that replikas were created by Xana, based on a Lyoko sector?" asked Jeremy. Everyone nodded.

"From the codes my father trusted me with," added Aelita.

"I was thinking the same. Even with the fact that Tyron had created the Cortex, I still thought that Xana had created replikas around himself. Like some sort of matrix and he used Tyron to make it."

"And that's not right?" asked Ulrich.

"No." Harry shook his head. "It's not really Xana's style. The cortex was the place of Xana's rebirth. It's supported by another quantum computer. I saw it when I explored the compound where it's located."

"Another one?" asked William.

"You can't run a program like Lyoko or the Cortex off a normal computer. You'd need several hundred just to have enough memory space to hold them."

"And this Tyron developed it?" asked Yumi.

"Yes. As Franz said, he used to work for him when Franz was working for project carthage. He would know how to do something like this."

"Are you ready to go back to the compound Harry?" asked Jeremy. "I suggest you take someone with you."

Later

"Harry! Jeremy!" Laura ran over to the two. "I was looking for you. Are you going to be working on your game?"

"We can't hide anything from you," said Jeremy after a glance at Harry. "It's not ready yet though. It needs a lot more work."

"Like I was saying earlier. If you need any help, I'm really good. In computer science."

"I think I'm enough," said Harry with a frown. "I have several games out there that sell well. I know how to program. Besides, we've only just met. I think it's a bit early for you to come round our dorm."

"And it's really kind of you Laura but it's top secret," added Aelita. "We don't want anyone to steal our idea."

"Ok." Laura walked off.

"She's clingy," said Harry with a frown. "And charming."

"Don't be getting any ideas Harry." Smiling, Harry kissed Sissi before she could say anything else.

"Incredible," said Odd. "This is the second time she's spoken to you in one day. I think she's in love," said Odd.

"It does seem that way," said William in agreement.

"Or she's just showing off," said Aelita.

Lyoko

"So, what are you going to do?" asked William to Harry as they walked to the Garage.

"I'm going to vest the compound," explained Harry. "I added a second seat to the Lightening. The Skid is a bit too big to be able to navigate the Cortex properly so if someone wants to come, they'll have to come with me."

"I'll come," offered William.

"If you want to."

Kadic

"Hey, you're part of Jeremy Belpois' group, right?" asked Laura as she walked over to Luna.

"They're very nice and brave."

"Do you know about their project?"

"Project?" Luna looked slightly confused.

"They told me they were working on an online game. Something secret. I saw them walking towards the park in a hurry."

"Really?"

"Do you think if you told them about me, I could be in?"

"Harry is better at programming. It's top secret anyway." Luna walked off quickly. Laura followed her.

Cortex

"Are you ready?" asked Jeremy as Harry docked to a tower.

"Yep."

"Sure am."

"Alright."

The two disappeared.

"And I'm sending the rest of you your new vehicle."

"Yeah, awesome," said Odd as the four wheeled vehicle appeared.

"I present you the Cortexian Rolling Articulating Spheroid Techto-compatible Mega-Multipod Vehicle."

"Weren't you able to come up with a more pronounceable name?" asked Odd as they walked over to it.

"Isn't that pronounceable?"

"And how do we get inside?" asked Sissi.

"And who's going to drive it?" asked Aelita.

"Me!" Ulrich and Odd glared at each other as Yumi shook her head.

"It will be Yumi."

"Well, sorry guys." Yumi walked over to the Vehicle

"Why does she get to do it?" moaned Odd.

"She didn't ask. Come on, let's go."

"Why are the girls always driving the nice things?" muttered Odd.

Earth

"Nice place here." William walked out before Harry pulled him behind the wall as a couple of guards passed. "With not very smart guards."

"There's the supercomputer." Harry pointed at it. "I'll hack into it while you keep an eye out."

"Why can't I hack into it?"

"No offence William but I'm much better at hacking than you are."

William grumbled as the two ran quietly into the room. Harry started to type at the keyboard.

"Put a virus to keep a log of any passwords, something to find Xana…."

"Harry…."

"What? Oh, hello Tyron."

"What are you doing here?" the short man demanded.

"Oh, you know, the usual. Fighting a psychopathic computer program."

William nudged him.

"What? It's not like he's going to remember this. Obliviate."

The man looked dazed. Harry quickly wrote down a message before the two ran out the door.

"Jeremy…"

"Bringing you in."

They disappeared.

Cortex

"So, what have we missed?" asked Harry.

"An argument about who will drive the Cortexian Rolling Articulating Spheroid Techto-compatible Mega-Multipod Vehicle."

"That's a long name," muttered William.

"Go meet up with them. We're waiting for you."

The two shrugged as they sped away as smoke.

"You took so long," moaned Odd as they reformed next to him. The Lightning parked itself next to the Skid. "And that's creepy."

"Aren't you coming Odd?" asked Aelita as they stood next to the vehicle. A blue light surrounded them as they moved into the vehicle.

"You'll find it easy to drive Yumi," said Jeremy. "It's just like the vehicles from Galactic Destructor."

"But I've never played gal tic destructor," pointed out Yumi.

"Don't worry. It's instinctive. And I programmed it to automatically adapt to the moving field."

"If you say so," said Yumi as she looked at the rather complicated looking display.

"If you want, we could change," offered Odd as he leaned over. "I'm the best at Galactic Destructor."

"Yeah, right," said William as he cuffed the cat. "You keep crashing."

"Brace yourselves." They started to move off in a wonky line.

"That's it. I'm going to be sick," moaned Odd.

"I hope you planned some vomiting bags Jeremy," joked Ulrich.

"Or airbags," added Sissi. "I for one don't plan on getting devirtualised by hitting the back of a chair."

"Here we go!" the landscape started to move. They jumped over the widening gap.

"This is like a rollercoaster," commented Harry. One of the wheels went over the edge.

"Watch out Yumi," warned Jeremy. Harry's clone popped over to watch.

"You said that the Megapod thingy would automatically adapt," pointed out Yumi as she tried to get back up.

"It needs a minimal anticipation!"

"We could change driver if you want," offered Odd.

"We would throw up with your driving," said Sissi. They knocked into a wall and skidded back into a wider area before stopping as everyone recovered. Yumi started to drive again.

Factory

Laura watched as Luna walked to the elevator.

"Homenum Revelio," Luna raised an eyebrow as she received the results before stepping into the elevator and going down to the lab. Laura inspected the control panel.

Lab

Jeremy jumped as Luna entered the lab. "You could have warned me Luna. You freaked me out."

"Well, you could use my help on Lyoko," said Luna. "You know I won't tell anyone. You know that new girl, Laura? She followed me here. You might want to do a return to the past."

"Thanks Luna."

Luna smiled. "You're not as tough as you look."

She returned to the factory.

Factory

Laura hid as she heard the elevator come back up. Luna walked out and towards the exit. Laura returned to the panel and continued to study it before removing the cover.

Cortex

"Is there something wrong?" asked Yumi as she noticed Aelita's face.

"I'm just wondering how Xana found this place."

"Luck, I think," said Harry. "This place is pretty far out, even on the network."

"Oh, great. I miscalculated my position," said Yumi as she read the display. "We'll have to go around the core before reaching the door."

One of the wheels got caught and the Megapod flipped over. Yumi tried to move but the wheel just sparked.

"There's no way out. We're stuck."

"Jeremy could try to reload it," suggested Harry.

"Ah, now if I was the one in charge," started Odd.

"Not now Odd!"

"Never make her mad when she's driving," said Ulrich wisely.

"Shut up!" everyone stared at the pink haired girl.

"Guys, Luna said that Laura followed her to the factory," said Jeremy.

The Megapod started to shake.

"What's happening?"

"You've got visitors."

Krabes fried on it.

"You know what your Megapod is missing?" asked Odd. "A cannon!"

"It's not Megapod, it's…. Never mind. Next time, I'll put a cannon in your shoe. For now, everyone except Yumi is to fight the normal way."

"Finally, a bit of action!" they launched into battle.

"Krabe sandwich!" everyone stared at Harry. "What?"

"That's something Odd would say!" said Ulrich.

Yumi pressed buttons and the displays disappeared. "What did I do?"

"You made the program lag. Hang on. Harry, tell your clones to help out."

"Done it."

"Everything's stuck," moaned Jeremy as he pressed buttons. The door opened to reveal Laura. "Laura, I don't have time to deal with you."

Aelita landed on one of the Krabes and held on as it tried to knock her off. She hit it with an energy field before flying off.

"Where are you going?" asked Ulrich as she watched her go.

"There's something I need to check. You're in charge."

A Krabe used Ulrich's distraction to kick him. Harry hit a hornet before stabbing a Megatank. The Cortex began to shake as the gap the wheel was stuck in widened. The Megatank fell. Harry tried to catch it with telekinesis but had to let it fall.

"Yumi!"

The Megatank landed on some ledges.

They all jumped down as the monsters advanced.

"You're back?" asked Ulrich as Aelita landed.

"Yeah. I saw that you couldn't handle it without me."

She hit a Krabe as Harry fought off two creepers.

"Jeremy, tell me you're managing something!"

"I'm trying Yumi. Laura's arrived. Harry, you have to stop the Monsters from destroying the Megapod otherwise it's a one way trip for Yumi into the digital sea."

"I'm trying. It's a pity you have my clones. I could use them here."

Laura glanced at the clones and shivered. "How is he doing that?"

"None of your business. If you really want to know, ask Harry. I can't guarantee that he'll say anything though."

"And that's not really a videogame, right?"

"We can't hide anything from you."

"Are your friends inside?"

"More or less."

"Is it a quantum computer?"

"Kinda."

One of Harry's clones flipped a few switches.

"Jeremy, I'm starting to feel a bit lonely here," said Yumi as she listened to some creaks.

"Yeah, I know Yumi. We're working on it."

Harry's clones continued to flip switches and connect wires.

"Look, your friend is in danger and if you need help, well…"

"I think we have enough people working on it thanks Laura."

"Jeremy, it's getting tough here," said Ulrich. Sissi shot down a hornet that got too close. William sliced another Krabe.

"Jermyn? What the hell is he doing?" asked Aelita. She flew on top of the Megapod and created a shield to deflect the shots. Odd knocked a Krabe off the wall and landed on a ledge. The unfortunate Krabe fell into the digital sea.

"Well, maybe he's off to flirt either his girlfriend. You know, the other Mrs Einstein," said Odd. Aelita growled and devirtualised. She walked up to the lab and stared at Laura.

"What are you doing here Laura?"

"Being an annoyance," called one of the clones. "She keeps asking how I'm in three places at once. We don't tell her and she gets all huffy."

Odd ran back up the wall and fired on the Krabe.

"Would you still like to be in Yumi's shoes?" asked Ulrich as more monsters advanced.

"Well, let's forget about what I said. This thing's a trap," said Odd as Sissi took the shots and devirtualised. "Harry, your girlfriend just got devirtualised."

He devirtualised as well.

"Harry, I suggest you go faster," called Ulrich. Several Krabes blew up. Ulrich went and tried to defend the Megapod and also devirtualised.

"Now it's just us," said William as he and Harry stood back to back.

"Well, you always seemed to want to be on the same team as me when you were under Xana's control. Now we are though I don't think this was what you meant."

The Megapod fell off. Jeremy devirtualised Yumi as it fell into the digital sea.

Lab

"And did you really manage to keep it a secret until now?" asked Laura.

"Let's say that some people are more curious than others," said Jeremy.

"So, was the mission a success?" asked Laura.

"We didn't manage to reach the core," said Aelita as she glared at Laura. "And I don't think Jeremy can reprogram the Megapod quickly."

"It's not as complicated as the Skid," said Jeremy. "I'll have to install some weapons and make the system better. I'll leave that to Harry. He's a better programmer than me."

And Yumi almost disappeared today. Think about the others Aelita," added Laura.

"I don't think you should aggravate her," said Harry as he glanced at Aelita. "She already doesn't like you."

"Well, let's decide what we're going to do with Laura, shall we?" asked Ulrich.

"She could be a help when Harry and Aelita are virtualised but Harry can just leave his clones on Earth," said Jeremy as he rubbed his head. "We can either allow you into the team, push a button and go back in time or Harry could erase your memories of you being here."

"Everything?" asked Laura.

"Everything. You'd never remember what happened here."

"Let's vote," said Yumi. Everyone looked at each other. Aelita walked over to the computer and ran the return to the past. Laura glared at her as the white light covered her.

Earlier

Jeremy looked at Aelita before shaking his head.

"I don't trust that girl," whispered Aelita. "Harry doesn't either."

"He's just following the law," Jeremy whispered back. "They're not supposed to know about magic."

"Who can give me the speed of the inertia centre of the Earth?" asked the teacher. Laura raised her hand.

"Why don't you raise your hand?" whispered Aelita.

"I already know the answer."

"This isn't the time to play it fair." Jeremy sighed and raised his hand.

"Yes Jeremy?"

Laura looked disappointed as Jeremy walked to the front.

"This wasn't very fair when I was sure you were nice," whispered Odd.

"Nice? There can only be one Mrs Einstein," Amelia whispered back.

"The result is twenty seven kilometres per second," said Jeremy. Harry rolled his eyes at Laura.