I don't own Harry potter or Code Lyoko.

How to fool Xana

"Watch where you're going Della Robbia! You just trod on my foot," complained Herb as Odd passed him.

"Sorry, I forgot you had big feet!"

"You idiot!" Herb stomped off.

"Well, he's as lousy as ever," commented Odd.

"We are supposed to be friends with him now," pointed out Jeremy.

"And at least he isn't being annoying," said Sissi with a shrug.

"Xana's child play compared to him!"

"So, what's the subject of today's conference?" asked William as they sat down.

"You're going to like it. It's 'How to fool Xana'," said Jeremy. "You know that Xana tries his best to get back his source codes that he implanted in you."

"Difficult to forget that," said Ulrich as he folded his arms.

"What would happen if Xana got fake codes?" asked Jeremy.

"I really wouldn't talk about that where Xana could potentially be listening in," said Harry as he looked at a camera.

"You're going to implant some codes that would be useless if Xana stole them?" asked Ulrich.

"Exactly. Xana wouldn't gain any power if he got them," said Jeremy. "He could even lose some."

"Something tells me that would be a bad idea," said Sissi with a frown.

"What would be the effects on us?" asked Yumi.

"I don't know. That's the problem."

"Probably not very nice effects," said Harry with a sigh.

"Any volunteers to risk their lives?"

"It sounds quite appealing," said Ulrich. "Said like that."

"I could do it," offered Aelita.

"No, I need you in the lab. Unless you'd rather I'd ask Laura."

Harry winced. "I still don't trust that girl."

"Sorry, I'll pass this time," said Odd.

"Xana isn't after me," said Luna. "He would be suspicious if I had them."

"I could do it," said Yumi before getting interrupted by Ulrich.

"I'll do it!"

"Sure?" asked Jeremy.

"Sure. You can count on me."

"Here we go again," said Sissi to herself. "Another hare-brained scheme."

Lyoko

Yumi and Ulrich appeared in the desert sector. The Overbike materialised.

"The way tower is to the north. Be careful," warned Jeremy.

"Got it Jeremy."

"It looks quiet," commented Yumi.

"Too quiet for my tastes."

They climbed on the Overbike and rode away.

"You know, you didn't have to offer to do this," said Yumi.

"I don't like the idea of a spectre touching you."

"I don't like this," said Harry.

"As you've said before."

"Here we are," said Ulrich as he approached the way tower before hearing a screeching noise. "Two Krabes."

"They're just scouts. They won't attack," reassured Yumi.

"I'll take care of them!" Ulrich gripped his swords.

"Wait! The mission is the priority! We didn't come here to fight!"

"The girl has a point," said Harry.

"If the Krabes shoot at us, the mission is a failure!"

"And if you don't be quiet, they will definitely shoot at you," pointed out Harry.

"Yumi's right Ulrich," said Jeremy.

"Alright. I'll just enter the tower then."

"He's going to be in a mood," said Harry with a sigh.

"You sure about that?" asked William. Harry sent him a look as Ulrich walked to the screen.

"Jeremy? I'm ready. You can send it."

Aelita connected her laptop.

"Ok Aelita?"

"Just one second…. It's alright."

"Imagine if he turns into a dark Ulrich?" asked Odd.

"Odd, you're not funny," said William.

"And I don't think you should say that sort of stuff when William is near," said Harry. "Or me."

"Bad memories, right?" asked Sissi.

"Ready Ulrich?" asked Jeremy as his fingers hovered over the keyboard.

"Yep."

"Injection."

Lines travelled over Ulrich's body as the codes settled within him. He started to glow with a bright light. Errors started to pop up.

"What's wrong?" asked Aelita.

"There's a bug!"

"There's always a bug," muttered Harry.

"I think that you should have checked it Harry," said Sissi as she nudged the boy.

The tower's segments popped in and out randomly.

"Jeremy?" asked Yumi worriedly.

"You were given a 128, 432 and 506!"

"Wait, not so fast. 432 and what?" asked Aelita.

"Uh, I think Jeremy has enough reason to be going so fast," said Harry as he stretched his arms.

"506. We need to reconfigure the random components." Jeremy hurriedly pressed buttons. "It's not working."

The bugs cleared.

"What did you do?"

"What you told me to do," said Aelita with a shrug.

"Heh, looks like you don't always need my help," said Harry with a grin.

"Sometimes only one head is needed when two might be better," said Luna.

"What? Where do you get this stuff?" asked Harry.

"Ulrich? Ulrich? Are you ok?" asked Jeremy.

Ulrich jumped out of the tower.

"Ulrich?" asked Yumi.

The boy pulled his swords out. Yumi pulled out her fans.

"Jeremy, I think we have a small problem."

"Stop clowning around Ulrich," said Harry with a sigh of exasperation.

"Boo!" Ulrich started to laugh. "If you could see your face!"

"You're so stupid!"

They started to disappear as Jeremy brought them in.

"So far, everything is in order," said Jeremy as the two walked into the lab. "The fake codes have been implanted."

"How do you feel?" asked Aelita.

"As usual." Ulrich shrugged.

"And that wasn't a very nice prank Ulrich," said Harry with a groan. "If it wasn't for the fact that I knew you…"

"Now all we have to do is wait for an attack," said Jeremy as a finisher to what he was talking about. "If Xana sends a spectre, he'll have a big surprise."

"Assuming that he goes after Ulrich," added Harry.

Kadic

"That reminds me, did you ever find any Nargles?" asked Harry as they walked past the columns.

"No but we did have a good time," said Luna as she took Odd's hand. The boy blushed as the girl dragged him away.

"Well, someone's got it bad," said Harry with a smile as they sat on a bench. A boy pushed past Herb.

"Hey, watch where you're going!" Herb met the boy's eyes. "I… I…"

The boy moved away, leaving Herb staring at nothing. Harry stared at the boy in interest.

Lab

William read a magazine as the computer beeped.

"Activated tower. Desert sector," said Jeremy. "I'll launch the visual scan. And call the others."

Aelita did just that.

Kadic

Ulrich picked up his mobile. "Yeah? Ok, got it. See you later."

"What? Xana launched an attack?" asked Harry as he cocked his head.

"Here we go. Harry, are you going to Lyoko or what?"

Harry shrugged. "Might as well. It's not like you need me here."

"Did you see Ms Hertz?" asked Ulrich as he saw the teacher. "Has she got a new haircut?"

"No." Yumi shook her head as Harry left.

"What about him? Is he looking at us?" Ulrich pointed towards the boy he meant.

"He's always looked strange." Jim came out. "Jim."

Yumi grabbed Ulrich's hand.

"Ah. I was looking for you. Don't forget the training session. 7 pm this evening. Ok?"

Yumi and Ulrich exchanged a look.

"Sorry, I'm disturbing."

"Not at all Jim," Yumi said quickly. Jim quickly left. Odd knocked into Herb.

"Again? Are you blind?"

"Sorry."

"Are you alright Herb?"

The boy didn't answer as he left. Odd called Jeremy.

"Jeremy? Spectre spotted. It's Herb."

"Are you sure?" asked Jeremy.

"He didn't insult me when I knocked into him. Isn't that proof? Follow her? I was just going to meet back up with Luna." Odd sighed in sadness. "Ok. What a nightmare."

The boy started to trail Herb before pausing when he saw Luna.

"Jeremy must have told Ulrich after all." He sat down next to Luna. "Hello Luna."

Ulrich and Yumi spotted Herb.

"I'll go." Ulrich ran over to the boy. "Herb?"

The spectre watched them before meeting Yumi's eyes. Ulrich noticed as Sissi frowned.

"Yumi? Yumi!" The girl didn't respond. Ulrich ran over and shook her. "You hear me?"

The eye of Xana flashed in the spectre's eyes. Ulrich saw it and froze. The spectre then followed Yumi.

"Ulrich?" Herb touched him. Ulrich jerked at the contact.

"Where's Yumi?"

"She left with that weird guy. Why?"

"Later!" Ulrich shot after them. "Jeremy, you know that spectre? He's doing something strange with his eyes. You get confused when you look at him. No, I couldn't touch him. He's suspicious. I think he knows about the codes.

"Not good. Ulrich, you've got to pass him your fake codes, ok? If possible, before he touches Yumi."

"Harry's on his way over to you."

"Yeah, he's already here." Jeremy glanced at Harry as he cut the call. "Xana knows about the fake codes."

"How could he?" asked William in surprise.

"I don't know. He may have spied on us. Or…."

"The bug when you entered the codes," finished Aelita.

"I should have guessed."

"Xana always does like to be tricky," said Harry with a shrug.

"Alright, let's change our plans. You go to Lyoko. I prefer to watch my back."

The three turned towards the elevator.

Lyoko

The three landed as the Overwing appeared.

"The activated tower is to the north west. Get closer but don't take any action for now. We're waiting for Ulrich to catch the spectre. Got it?"

"Got it," said William. "Hope you don't mind the smoke."

"I'll see you there," said Aelita as William turned to smoke.

"Race ya," called Harry as he also turned to smoke.

Kadic

The spectre walked past the tree Yumi was hiding behind. The girl ran into an empty classroom and hid behind the desk. She jumped as her phone rang.

"Come on Yumi, pick up," muttered Ulrich as he tried to find her. The spectre heard the noise and entered the classroom. She picked up the rubber.

Lyoko

"Jeremy, here we are," said Aelita as the three peered out at the tower. They ran forward.

"Xana's sent a welcoming committee. Two Krabes."

"Seriously?" asked Harry with a raised eyebrow. "Two Krabes?"

"Can you see them?"

The monsters walked past the rock they were hiding behind.

"Yes, we can see them. Any news from the others?" asked Aelita.

"No, not yet. But be ready to engage."

"Of course, Xana was expecting us," muttered William as he shifted against the rock. "We should get rid of the Krabes, no?"

"It would reveal our location to Xana and he'll send more," pointed out Aelita.

"The girl has a point," commented Harry. "And I'm surprised that I haven't seen a certain monster. I mean, we all know Xana wants me so…."

"We'd better split then," suggested William. "As soon as Jeremy gives the green light, I'll take care of the Krabes as you try to reach the tower."

"Ok."

William turned to smoke again and sped away. Aelita watched the Krabes pass their hiding place.

"Not very bright, are they?" asked Harry.

Kadic

Yumi threw the rubber and the spectre followed the noise. She ran out the door.

Lyoko

Aelita ran out in front of a Blok, paused and threw an energy field at it.

"Ok, they know we're here now," muttered Harry.

"Jeremy, there's a problem," said Aelita worriedly as three more advanced on the two.

"Problem? What problem?" asked Harry as he stabbed the last Blok.

"Ok William, no time for discretion anymore. Just rush in."

"Got it Jeremy." The two Krabes turned to face him. He shot towards them and turned to smoke in order to regroup.

"Hey William. Come to join the destruction fest?" asked Harry as he sliced a hornet.

"Easy there Bloks. I have a present for you!" Aelita sent two energy fields into one of the Bloks surrounding her and destroyed it. William jumped on top of another and stabbed it as the third hit Aelita and devirtualised her. William caught her disappearing body before sending both the Blok and his sword into a rock.

"Oh, here come the Krabes," commented Harry as he finished the last of the hornets.

Kadic

"Jeremy? The spectre is chasing me." Yumi listened for a second. "No, I don't know where Ulrich is."

"The mission is cancelled. Try to hide in the gym," suggested Jeremy. "We'll take care of the tower."

Odd listened to Luna speak as his phone rang.

"Hold on a second. Yes Einstein? You can't do this to me!"

"Sorry Odd. It's a complete failure. Yumi's in danger and Harry and William are on Lyoko."

"Why can't they handle it?"

Jeremy growled slightly. "It's good to have back up. Besides, I think Xana has something up his sleeve for Harry. He hasn't sent any spectres after him. I really don't want Harry alone on Lyoko."

"Alright. I'm coming." Odd ended the call. "I have to go to Lyoko."

"That's fine. Saving the world is more important than what I like to do in my spare time. I'll stay at school."

"Jeremy? No, I didn't manage to touch him. Me and Sissi split up to find Yumi. What? The gym? Alright."

Ulrich ran towards the room.

Lyoko

"Ok, shall we try to get to the tower or what?" asked Harry as William ran forward and turned to smoke. He reformed and deflected two of the monster's shots before getting hit. Harry shot the last one. Odd appeared. "Hello Odd."

"What have we got?"

"A Krabe and a couple of Bloks wandering around," explained William.

"Ok. Let's take care of them."

"What's going on? You look upset," commented William as he picked up his sword.

"Girl trouble?" asked Harry.

"I'd rather not talk about it if you don't mind." Odd turned away slightly before narrowly dodging a shot and shooting towards the monsters. Harry and William followed. Off jumped on top of a Blok, shooting it before jumping onto the Krabe and shooting it. William stabbed a Blok while Harry took on a squadron of hornets.

"Odd! Watch out!"

Odd jumped off the Krabe as it imploded before getting the Blok.

"You've never done such a thing before," commented William as Harry took out the last hornet. Odd sent him a smile.

"I suggest that you be careful Odd," said Jeremy.

"Yes Einstein." Odd shook his head.

"Did you leave Luna?" asked William. Harry looked between the two.

"No comment."

"Watch out guys. Some more monsters are turning up on my screen," warned Jeremy.

"Oh joy," said Harry as he stared at the monsters. They backed away before running behind a rock.

"Bo way. I thought I could finish this and see Luna again," moaned Odd.

"Someone's got a crush," snickered Harry.

"I suggest that you don't give up. Look at me, I never gave up with Yumi."

"Uh, didn't you give up with Yumi?" asked Harry.

"You weren't especially successful either," added Odd.

"No, I'm waiting to see how Yumi and Ulrich get along. If they break up, I'll be there to snatch Yumi away. I think nothing is impossible. Listen Odd, as long as there's hope, you have to hang on."

William shot over the rock as smoke before stabbing a Blok and being devirtualised by another.

"And he's meant to be setting an example," muttered Odd.

"Hey, he tried," said Harry with a shrug. "Even if what he just did was a bit impulsive."

Gym

Yumi pulled out her phone. "Yes Jeremy? I'm in the gym. I…"

She cut the call as the spectre entered the room.

"Yumi? Yumi?"

Yumi watched the spectre before slipping around the mats and out the door, the spectre on her heels.

Lyoko

"Odd? Harry? Do whatever you want but do something!"

Odd glanced at the Overboard. "Ok Jeremy. You just needed to ask."

Harry hopped over the rock and flicked a kunai at a Block, hitting it in the weak spot then jumped back as Odd flew ahead.

"What are you doing Odd?"

"Attacking. As long as there's hope, you have to hang on!" He jumped over a Blok.

"That's too dangerous!"

"Woohoo!" Harry started to run in-between the shots.

"You asked for it," reminded Odd as he halted the Overboard using the ground and jumped into the tower, landing awkwardly. "You're not going to believe this Jeremy but I passed through."

He started to rise upwards.

Kadic

Yumi ran into a room as the spectre followed close behind her. It started to hypnotise her as Ulrich caught up. He touched the spectre.

"Ulrich? It's working! We're stuffing him with fake codes!"

The spectre exploded as Ulrich fell to the floor. Yumi started as she recovered.

Lyoko

"It's ok Odd. The spectre's been destroyed. I'll bring you back."

"What? Oh no. I did all this for nothing?"

Harry burst out laughing.

Kadic

"Ulrich!" Yumi ran over to him and pulled him into her arms. "Ulrich?!"

She pulled out her phone. "Jeremy? It's Ulrich…."

Lurch started to wake up. "If you could see your face…"

"You're so stupid."

"Uh, I think I should leave," muttered Sissi as she backed out the door she had just entered.

Later

"Enough with the fake codes. It's not worth it," decided Jeremy.

"But Xana lost some power as expected, right?" asked William.

"Yes but it comes with a price. Ask Ulrich." Jeremy gestured towards the boy.

"I'll be fine," insisted Ulrich.

"Sure you will be while Yumi is holding you," commented Sissi. The two glared at her.

"It's still too risky. And Xana was suspicious. He could have taken Yumi's codes instead we'll find another way to counter Xana."

"I had a feeling that it would cause some nasty side effects," said Harry.

"No one was hurt," pointed out Luna. "Permanently."