Hope you enjoy.

(Jim was locking up the gymnasium, after being certain that the facility was empty of any staff and students. He continued to search the rest of the campus until he heard a rustling in the bushes and decided to investigate.)

Jim: "Hey! Get out of the bushes and head to the dorms. There's a flu going around."

(X.A.N.A. quickly extended an arm, grabbed Jim, and knocked him out in the bushes. X.A.N.A. cut out a strain of Jim's hair with a small scythe-like slash and reformed himself into Jim with the hair strains withering into white hairs and dissolving in the process of the transformation. X.A.N.A. then casually arose from the bushes as he scanned his surroundings.)

X.A.N.A.: "(Sounding robotic at first but then slowly sounding exactly like Jim) Testing. Testing. Testing. … Perfect."

(Jeremy was on his computer putting the final lines of code for the Skid 2.0. He pressed 'Enter' on the keyboard to test its functions, coming out with a positive for operation on Lyoko.)

Jeremy: "Finally, it's done. I need to call Aelita."

(Just then he got a call with the caller ID being: 'Honestly_You_Should've_Seen_This_Coming')

Jeremy: "Oh no."

(Einstein was about to answer the call but it automatically answered itself.)

James: "Hello there, Mr. Belphois."

Jeremy: "What do you want, now?"

James: "I have a challenge for your group, Belphois. Care to hear the details?"

Jeremy: "Yes."

James: "I have a … special polymorphic spectre roaming the academy. What makes it special is that it can… well… I wouldn't want to ruin it for you."

Jeremy: "What's the twist?"

James: "I'm getting to that. The twist is that the tower will be guarded by one monster."

Jeremy: "It's that Marabuta from last night isn't it?"

James: "Of course! But by the time this recorded message has ended, all cellphone signals will be neutralized across the city."

Jeremy: "Recorded message?!"

James: "Bye. Hope you got vaccinated."

(The call ended and Jeremy was left to his thoughts.)

Jeremy: "Vaccination? I should've known."

(Jeremy checked his phone.)

Jeremy: "He wasn't bluffing. I need to figure something out."

(Meanwhile, Ulrich and Odd entered their dorm room. Odd pulled out Kiwi from under the bed drawer.)

Odd: "There, there my little diggidy-dog."

Ulrich: "Odd, when was the last time you washed him? It can smell him from my side of the room."

Odd: "Well, I guess I forgot with James constant this week."

Ulrich: "Well, we can't do it now with the teachers monitoring the hallway. We're going to have to wait it out."

Odd: "Um… I actually heard that there was a sanitation crew coming to clean the school."

Ulrich: "Well, you better hope that James gives us another attack."

(A knock was heard on the door. Odd quickly stuffed Kiwi under his shirt. Ulrich crept up to the door.)

Ulrich: "Who is it?"

Jeremy: "It's me, Jeremy."

Odd: "Oh thank goodness."

(Odd released Kiwi from his shirt and Ulrich opened the door.)

Jeremy: "James is attacking. He's taken out all cellphone towers throughout the city. There's also a polymorphic spectre on the loose and it has something a little extra he added."

Ulrich: "So how do we know that you aren't the spectre?"

Jeremy: "Then I wouldn't be going after the only two people who are together."

Odd: "He has a point."

Ulrich: "Alright. I heard that William got sick so he'll have to pass."

(The group cautiously went upstairs to the girls' level and gathered Urma and Aelita.)

Urma: "So there is a type of spectre that can change its form. Interesting."

Jeremy: "We'll take the sewer entrance in the boiler room. It's too risky going through the courtyard."

(They carefully went to the southeast corner of the campus and took the staircase down to the bottom floor unnoticed. But they find the entrance to the boiler room locked.)

Ulrich: "Jim must've locked out the gym."

Urma: "I can try to pick the lock."

(They soon heard footsteps down the hall.)

Aelita: "No time. We'll just have to make a run to the woods."

(They quickly took an exit into the sport's courtyard and quickly dart across the field staying near the gymnasium single-filed with Urma leading the group. They quickly halted to find Jim.)

Jim: "What are you doing out here. There's a flu going around!"

Urma: "Déjà vu."

(Jim noticed Jeremy behind her and the other warriors.)

Jim: "*quickly becoming synthetic* Belphios!"

(His right arm became solid black as it extended for Jeremy but Urma pulled him away in time before it penetrated the wall.)

Aelita: "What kind of spectre is that?"

(X.A.N.A. slowly revealed his body for what it really was. It retracted the arm and reformed it into a solid Zwiehandler as it revealed his face.)

Ulrich: "What the-"

Aelita: "No. I-it can't be. That mask."

Jeremy: "X.A.N.A.?"

Odd: "No way. It's probably another trick."

Urma: "I don't know. But it seems very angry to see Jeremy."

(X.A.N.A. swung his sword at the warriors and quickly got out of the way.)

Urma: "What's the plan?"

Jeremy: "James said there would only be a Marabunta guarding the tower. We will only need a few people."

Ulrich: "I'll fight X.A.N.A."

Urma: "Me too he doesn't have anything against me.

(X.A.N.A. extended his left arm, grabbing Jeremy by the leg, and tossed-slammed him over himself.)

Aelita: "Jeremy!"

Jeremy: "Just run!"

(Aelita and Odd darted for the woods as Ulrich and Urma became ready for combat. X.A.N.A. ignored the two and moved towards Jeremy. Urma threw a fast punch but sunk into the goo. She tried to pull out but her fist got stuck.)

Urma: "What the- Come on get- ow."

(Her fist was released to see a small bleeding cut on her finger. X.A.N.A. turned into Urma and kicked Urma back several feet. The A.I. quickly found the 'special' program and activated it.)

Searching digital code…

0 out of 1 codes match form…

(As Ulrich attacked him, he quickly checked the file containing the digital code. The only item in the file was labeled 'Dunbar'. He let out a grin as he dodged and countered a kick from Ulrich, striking him in the stomach. Jeremy got up and attempted to flee, but X.A.N.A. extended his arm, grabbing him by the ankle again, causing X.A.N.A. to revert to his actual form.)

X.A.N.A.: "Where's Dunbar?"

Urma: "Hey!"

(X.A.N.A was immediately kicked in the face by Urma as soon as he turned around. He dropped Jeremy and released a sharp screech and covered his cracked mask. The cry was heard all the way to the surrounding buildings, including the infirmary.)

Yolanda: "What was that?"

(She looked out the window to see X.A.N.A. forming a hammer and trying to crush Urma. But she dodged and took Jeremy out of the way. As Yolanda quickly went to call the authorities, other patients quickly got out of bed to see what was up.)

"What is that?"

"What are those three doing out there? Run!"

(William slowly got up to see what the deal was. He couldn't tell what his friends were fighting until he saw the mask that was patched up by his solidified mixture. Flashbacks of his possession sprung out as he went into a panic attack.)

William: "No. No. Th-this can't be happening."

"William, what's up with you?"

Yolanda: "William, I need you to calm down."

(As his peers tried to help him, William inched away, only seeing them as Schiphizoas. He backed long the side of Yolanda's desk and found his hand on the lamp.)

William: "Stay back!"

(He threw the lamp as hard as he could. The students ducked and the lamp smashed the window. The three warriors and X.A.N.A. heard the broken glass.)

William: "(faintly in the distance) No! Let go of me! Stop!"

Ulrich: "Oh no."

(The students were pinning down William when the light from the window vanished, dimming the room. They turned around to see X.A.N.A.'s body covering the entire pane. He went through the hole and widened it, crushing the window frames. With the students' grip loosened by fear, William quickly got up and tried to run, but the illness caught up and he began to cough uncontrollably. X.A.N.A. reached out and scraped the mucus off the ground. He retracted the limb as the sample began to boil and evaporate. X.A.N.A's structure morphed into William crouching on the windowsill. All the students and Yolanda were shocked with what had happened in front of them, leaving them speechless.)

Phone: "Ma'am I need an answer. What is going on?"

(He let out a grin as he back-flipped outside and turned towards the warriors. He activated the 'special' procedure again and his body began to vibrate like a spectre. He laughed as he stabilized into William's Lyoko form and refitted it into the possessed version.)

X.A.N.A.: "*in possessed William's voice* Hahaha. Good to be back with this fine suit."

Ulrich: "Did it-"

Jeremy: "It… replicated his Lyoko form."

I apologize for this long-awaited chapter. The next one will also take some time.

But for now, have a good day!