I don't own Harry Potter or Code Lyoko.

A/n. there isn't a limit to the powers Harry can copy but they're slightly weaker than the original powers though there isn't any noticeable difference.

Logbook

"What are you looking for?" asked Odd. "I'm hungry."

"You go on ahead. I have to find something."

Ulrich opened his wardrobe and his draw. "I don't believe this!"

Cafeteria

"Eight slices of toast and three bananas. Not bad," said Odd.

"That has to be one of the most disgusting things I have ever seen," said Harry as he worked on his homework.

"Oh, yeah. Your brother was looking for something. He seemed really worried. Are you skipping gym class again, Jeremy."

"Yep. It gives me time to work on Aelita's materialisation program. Talking of programs, what did you do for that competition you entered?"

"Oh, nothing big," said Harry. "Just a small game."

"That's still a lot of programming though."

"I know."

Ulrich's and Odd's Dorm

"Oh. What are you doing here? Got something you want to tell me? Or, are you afraid that the wall's going to crumble?" Ulrich asked Sissi as he came out of his room.

"Very funny. Can I talk to you for a minute?" Sissi replied.

Later

"Hi, Yumi," said Harry as she walked by.

"Oh, hello. Huh? Look over there, its Ulrich… and Sissi!"

"What the…" harry muttered as he saw Ulrich and Sissi sitting together. "Oh… Odd, earlier, did you say that Ulrich was looking for something and seemed worried about it?"

"Yes. What about it?"

"I might know what's going on. Ulrich would never go out with Sissi of his own free will. Trust me on that."

Sissi started to drag Ulrich away.

History Class

Ulrich was sitting next to Sissi, Harry was next to Jeremy and Odd was behind him.

"What do you think happening with those two?" asked Odd.

"As I said, I have an idea but it's going to have to wait for later," said Harry.

"Why?"

"Because I'm not certain. Did Ulrich say what he was looking for?"

"Err, no."

"Now, I'm almost certain."

"On the bright side, look at Herb."

Herb was glaring at Ulrich.

"Odd, are you listening?" asked the teacher.

End of class

"We have some important things to talk about," Odd said to Sissi as he dragged her away from Ulrich.

"Mind explaining?" asked Jeremy.

"Why were you sitting with Sissi? Was it because she took your dairy?" asked Harry.

"Yes, she said that if I didn't go out with her, she'd give my diary to the press!"

"You wrote about Lyoko in it, didn't you?"

"Yes," Ulrich said sheepishly. "But if she thinks she can win me over that way, she's wrong."

"That's not the point."

"Don't worry. Me, Yumi and Harry will have a look around while you're at the pool. By the way, is there a reason why Harry doesn't do sports?"

Ulrich smiled. "It's because he doesn't like sports and he does other things."

"For the last time Odd, I did not have a nose job!" yelled Sissi. "And stop asking about it!"

"Leave her alone, Odd," said Ulrich as he walked over and led Sissi away who smirked at Odd.

"I'll explain later," said Jeremy to Odd.

Bus

"Have a look at this Odd," said Jim as people climbed on the bus. "This bus runs on nothing but electricity. That means that it's powerful but non-polluting."

"Electric, huh? I bet that it goes as fast as a snail."

No one noticed the smoke that crept over to the bus and slipped inside.

Odd waved to the bus driver as he climbed on. Suddenly the steering wheel started to crackle with electricity.

"What the?!"

"Now, now everyone on-board," said Jim as the last stragglers climbed on. "What's the problem?"

"I don't know," said the driver as he tapped the dashboard. A shadow went over the windscreen.

"What was that?" asked Jim.

"No idea," the driver said as he tapped the dashboard again. Nothing happened.

"Alright, everyone back in their seats," ordered Jim as the door shut and they drove off.

Harry's and Jeremy's room

Yumi punched the picture of Einstein on the wall.

"Sissi's blackmailing him?!"

"Yep. I was right about my theory. I knew that Ulrich kept a diary but I'd never thought that Sissi would steal it or I would have mentioned it before now to make sure that Sissi didn't get her hands on it," said Harry.

"What matters now is to find Ulrich's diary before Sissi can do any more damage," said Jeremy.

"I'll go through Sissi's room and call you if I need any help."

"We'll be at the factory."

"I'll be working on Aelita's materialisation program. I can't help feeling that I'm missing something," said Harry.

"Good luck."

Lab

Jeremy sat at the main computer while Harry pulled out his ever present laptop.

"It's Harry and Jeremy, Aelita. Do you hear us?" asked Jeremy.

"Hey Jeremy. I was waiting for you. While I was waiting, I was researching your world. There's so many strange things to discover."

"Hey Odd," said Jeremy as his number appeared on the screen. "Huh? Something strange is happening? What bus?"

"Is it Xana?" called out Harry. "Aelita, can you check?"

"Of course Harry."

Bus

"The bus is moving at two miles per hour," said Odd.

"Isn't this romantic?" asked Sissi.

"I don't know what's happening. I'm flooring the pedal but the bus is refusing to move any faster," said the driver, slightly confused.

Lab

"Ok, we're checking it out," said Jeremy as Harry put his laptop in its bag. "We'll call if we find anything. Huh, where are you going?" he asked Harry as Harry walked over to the lift.

"The scanners. I presume you want me on Lyoko?"

"Not just yet. We don't even know if it's a Xana attack or just something with the bus that's causing a problem."

Sissi's room

Yumi opened the door after she picked the lock with a hairpin. She looked through the full wardrobe, on top of the wardrobe and under the bed.

She then lay down on the bed to think when she felt something hard in the pillow. She unzipped it, pulled out the book inside and opened it.

"This isn't Ulrich's handwriting," she muttered as she read it. "It's Sissi's."

She gasped as she saw the page with Ulrich's picture and his name all over.

'I'm tired of how Ulrich acts as if I don't exist,' she read. 'He pays more attention to Yumi. So I went into his dorm after he'd left and found his diary. Now, he can't ignore me. I know this isn't very nice but this is the only way he'd notice me.' Of all the nasty tricks."

Lab

"Yumi, did you find Ulrich's diary?" asked Jeremy when she called.

"No but I did find Sissi's," she answered. "She knows about Lyoko, again. She doesn't fully understand what it is at the moment but she will tell everyone what she knows."

"Rats. Look, you have to find Ulrich's diary before they come back."

"I do have an idea."

Bus

"Hey, what if I ask my father if we can see a movie tonight, wouldn't that be cool?" Ulrich grunted. "I'm being nice to you. The least you can do is to stop ignoring me. If you do, everyone at school will read your diary."

"Alright, alright. You don't have to keep reminding me," said Ulrich exasperatedly. She didn't have to keep going on about it.

Her phone went off.

"Hello. Oh, Yumi. What do you want?"

"Well, I was just reading your diary and it was a very interesting thing. It has a few secrets that I'm sure you don't want spread around."

"Alright, what do you want?"

"Tell me where Ulrich's diary is."

"It's on top of the water tank in the third toilet in the girl's bathroom."

Yumi looked up and saw the book.

"I'll go check."

"Wait, what about my diary?" Sissi asked quickly but Yumi had already cut off the call.

"Thanks a lot Yumi," said Ulrich, grinning. "Now, I'm going to sit with my real friend."

He stood up and sat next to Odd.

Lab

"Aelita? Any sign?" asked Jeremy.

"Odd and Ulrich were right," said Aelita. "Xana's at it again. The pulsations are getting stronger."

"Now, I'm definitely going," said Harry.

"The tower's in the desert. Harry, get over to the scanners. You're going solo for now."

"It's strange how many times I go over solo when you said it was too dangerous."

"I know you're capable of handling it now. Besides you do have the most powers so I'm not really that worried anymore. Now, to the scanners."

"Aright, I'm going."

"Transfer Harry. Scanner. Virtualisation."

Lyoko

"Hey Aelita. Which way is the tower?" HArry asked as he met up with the girl.

"It's this way. And please, don't carry me on your back. I don't want to get dizzy again."

"We really need to program you a weapon."

Bus

"What the?" asked Jim as the bus started to speed up rapidly.

"This is weird," said the bus driver as the steering wheel started to crackle again.

Everyone screamed when the bus started to go even faster. Ulrich and Odd started to walk to the front of the bus.

"Get back to your seats," ordered Jim. "You're not allowed to get up."

"What's happening to the bus?" asked Ulrich, ignoring Jim.

"I wish I knew."

"Was it working alright before you last charged it?" asked Odd.

"It was fine."

Ulrich called Jeremy.

"Jeremy, Xana's taken complete control of the bus."

"Hang on a second," said Jeremy as he brought up a map. "I wonder what Xana is trying to do… Where are you?"

"I'm not entirely sure. I can't read the street names because the bus is going too fast. I think we just went past a church."

"I'll try to localise you."

"We're in for a rough ride," he said to Odd.

"We've gotta go help Aelita and/or Harry," said Odd. "Whichever one decides to deactivate the activated tower."

"You go. I'll stay here and keep an eye on things."

"Make sure you don't die or Harry will revive you and kill you himself."

Jim and the driver were struggling with the steering wheel when Odd opened the door and jumped out. He rolled a bit and the door closed.

"Take off your backpacks and use them as airbags," Ulrich advised as the bus got even faster. Everyone screamed as they went past a cross roads when they weren't allowed to cross.

"Now everyone get their seatbelts fastened," ordered Jim.

"Come on, calm down," the driver said to Herb. "Does the little girl need any help?"

"The little girl is fine."

"We just went passed the constellation intersection," Ulrich told Jeremy.

"I've got you now. I still don't know what Xana's trying to do though."

Kadic

"Yumi, come straight to the factory after class. Things are getting tough here," said Jeremy when Yumi answered her phone.

"Right," she said as she broke into a run.

Lyoko

"We've found the tower," said Harry.

"Well done. Now stay there and wait for Yumi."

"And Keep an eye out for any monster. It's too quiet over here since there hasn't been any monster attacks. Xana's up to something."

"Isn't he always up to something?"

"Who's always up to something?" asked Yumi as she entered the lab.

"Get to the scanners before the situation gets any worse," said Jeremy.

"Transfer Yumi. Scanner. Virtualisation."

"Hey Yumi," said Harry as she landed on her feet.

Bus

"Ulrich, Xana is sending the bus to the petrochemical plant," Jeremy said.

"What?!"

"There we are," said Jim as he cut a wire but the bus didn't stop. "There's no way we can stop this thing!"

"We have to jump," said the driver as he tried to open the doors. "Now look what you've done, you imbecile! That was the cable for the door!"

"Jim," Ulrich interrupted. "Jeremy thinks we're headed to the petrochemical plant."

"How does he know that?!"

"We'll tell you later. For now, trust us. He can help us."

"Yeah, okay. It's not like we've got anything else to do… except jumping off the bus."

"Err, Ulrich," said Sissi. "I'm sorry about your diary as it was wrong to take it. Is there anything I can do to help?"

"Be the go between Jeremy and me."

Lyoko

"The tower's real close now, you three," said Jeremy.

"Thanks for being Captain Obvious, Jeremy. We can see it," said Harry as they descended a slope. Aelita tried to walk forward but Yumi stopped her.

"This is too easy. Where are the monsters?"

"I was saying that earlier," piped up Harry. "Xana is definitely up to something. He's probably trying to get rid of me and Aelita so there's no one to deactivate the tower by lulling us into a false sense of security."

They heard wind blowing behind them.

"Tornado. Run!" yelled Harry and they started to sprint. "And knowing Xana, there's a monster in there!"

"There's a monster behind you," cried Jeremy.

"I thought so."

"What kind of monster?"

"Probably a Megatank. It's the only monster that could withstand the winds."

Harry quickly visualised a shuriken that could home in and go through the shell of a Megatank and threw it. They heard a bang and the tornado dispersed.

Bus

The bus sped past a police car that started after them. The officers also called other cars in the area to help them stop the runaway bus.

"The bus is going to turn left in ten seconds," said Jeremy over the phone.

"We're going to turn left," said Sissi.

"Everyone over here," said Ulrich as the Bus turned and everyone feel against the seats.

"Maybe we should jump off now," suggested Jim. "This way, it would be just the bus going into the petrochemical plant."

"We won't survive at this speed," said Sissi.

"Give me the phone," said Ulrich as he put out his hand. Sissi gave it to him.

"Jeremy how is it going on Lyoko?" he asked.

"Harry, Aelita and Yumi are almost at the tower but they're getting chased by Krabes!"

"We'll hold on a little longer then."

"You're going to reach the plant in ten minutes and you're going to turn left again," Jeremy warned.

"Everybody to the right," ordered Sissi as they reached the turn with several police cars chasing them.

Lyoko

"I hate Krabes!" shouted Harry as he took out another two. "At this rate, I'm going to run out of ammo!"

"Harry, remember that you still have the weapons of the others," Jeremy reminded him. "And you still have one hundred and fifty shuriken left, along with ten laser arrows."

"Can you program in more laser arrows, please?"

"You can do it when you get out of Lyoko. You can also work on that weapons program you were thinking of for Aelita."

"That's the last of those Krabes. Oh no, earthquake."

"Xana set a trap for us," said Yumi. "While Harry and I were distracted by the Krabes, he separated us from the tower. How many life points do we have?"

"Harry, as always, is still on full and Yumi has twenty."

"How do you dodge the lasers?" Yumi asked Harry.

"I don't know. The same reason as I always land on my feet, I think."

"Can you two stop talking and get to the tower?"

Aelita knelt down and started using creativity to make a bridge.

"Nice idea, Aelita. Now I won't have to jump over there with you on my back."

"That's a good thing. With the speed you would likely use, we'd get dizzy."

They ran over the bridge to the tower.

"Oh, Odd. Get to the scanners!"

Another Krabe was virtualised and it shot at Yumi, devirtualising her.

"Oh, no. Yumi! Now I'm angry!" Harry threw another shuriken to destroy it.

"You two, hide until Odd gets there. Transfer Odd. Scanner. Virtualisation."

"Aelita! Harry! Where are you?" Odd shouted, despite them being right in front of him.

Harry waved his hand in front of Odd's face. He didn't react.

"He can't see us. Are you doing Aelita?"

"No. I don't have the power to make people invisible."

"Aw man, now I can turn people invisible! Are all these powers part of being a ninja?"

"Where did you come from?" asked Odd.

"Apparently I can turn people invisible."

"You get all the awesome powers," complained Odd.

"Awesome but they paint a huge bull's-eye on my back, even bigger than the one I've got. I'm surprised Xana hasn't tried to kill me off yet. It's like he's waiting for something. Hey, Yumi! You're Japanese. What can you tell me about ninja?" Harry asked as they started off towards the tower again, keeping an eye out for any more earthquakes or other indicators of Xana.

"Why do you want to know about Ninja?"

"Because I want to know if my powers are normal for ninja."

"Well, ninja were historically mercenaries or covert agents centuries ago. They had a range of tasks including assassination, espionage and infiltration. Folklore now say that they could turn invisible, walk on water and used the natural elements."

"Ok, I should keep an eye out for walking on water and element manipulation. I just found out that I could turn myself and others invisible. But what about the copying of others powers?"

"That could be because you could be trying to gain proof that you were there when we were devirtualised."

"We've only got four minutes left," said Ulrich anxiously over the phone. "How are things on Lyoko?"

"Harry, Odd and Aelita are handling it," answered Jeremy as Yumi gave her explanation. "Careful. There's a ridge!"

"Huh? I have an idea. Harry can you throw us over the ridge?" asked Odd as another Megatank appeared.

"Yes, I van." With that, Harry grabbed their hands ran up to the ridge and used the momentum to throw them over. He then went back a few paces and ran forward again, jumping over the ridge just as the Megatank rolled up and fell into the digital sea.

"Megatanks sure have a glaring weakness. Aelita, can you deactivate the tower?"

"I can." Aelita ran to the tower, entered and rode the virtual elevator to the next platform. She walked up to the screen and pressed her hand to it.

Aelita

Code

Lyoko

The files flew down the tower.

Bus

"Oh, no we're going to crash," cried Sissi.

"It's all over for us."

Sissi and Ulrich screamed just before the bus started to slow down, just before it crashed.

Lab

"Well, it was close but we did it," said Jeremy in relief. "And Harry doesn't lose his brother. Ready to go back in time?"

Yumi nodded.

"Return to the past, now!"

The white light quickly engulfed everything.

Kadic

"Here's your diary," said Yumi, coming out of the toilets. "I didn't read it."

"I'll tell you about it one day. I'd better go. I don't want to miss Sissi."

Ulrich walked off.

Ulrich's and Odd's dorm

"Sissi, where you waiting for me?" asked Ulrich, diary under his arm. "Looking for something?"

"Uh, no. I was just passing by." She quickly ran off.

Harry's and Jeremy's Dorm

"How is the modification to your weapons going?" Jeremy asked.

"Oh, fine. The strange thing is, some of the powers I have look like they've been added later than when my avatar was first created," said Harry.

"You mean, someone added to your avatar?"

"Yes. And I bet it was the creator of Lyoko."

"That's weird. Why would someone add to a baby's avatar? Hey, maybe you're related to them!"

"I guess we'll never know for certain. Aelita, what kind of weapon do you want?"