Takes place between "Mixed Signals" and "A Family Holiday". Though of course it didn't actually happen...and though the device is explained, if you know Kim Possible, try to remember the episode "Emotion Sickness". It's a classic.

"César!"

The scientist looked up from his current project. Pieces of metal and circuit boards were strewn across his desk, along with a large, unfolded instruction blueprint sheet and a odd-looking remote control.

"Rex! What's up, Little Brother?" he responded, lifting his goggles from his eyes.

Rex walked over to the work desk casually, hands behind his back. "Oh...nothing much. I just heard that you got mail today! What'd you get?" Rex looked over the desk to see if anything letter-like was there.

César smirked at his brother's less-than-subtlety. "Nothing you'd care about. I was shipped the blueprints for a small project an old college friend of mine is working on. He told me about the design, but that he didn't have the resources to actually create it...so I offered!" He smiled down at the project. "It's actually a pretty simple design, I should be done after just a few..." He put the goggles back on and went back to work, Rex watching curiously.

"...more..."

"...seconds..."

Another spark and César closed the lid of the small device, holding it up for Rex to see. "And it's done! Or at least it should be. I just need to test it."

Rex went to grab it out of his brother's hands, but César yanked it away. Rex shrugged. "So what is it?"

The older Salazar examined both sides of the device, barely paying attention to his own answer. "Dr. Bortel called it a "moodulator". Not the most creative name...but it fits."

Rex raised an eyebrow. Sounded weird to him. "But what does it do...?"

Grabbing the remote off his desk, César turned back to Rex and pressed what Rex assumed was the power button. A small, colorful, smiley face appeared on the remote's screen and Rex smirked. "This is the remote to the moodulator. It has five different mood options...happy, sad, angry, confused, and enamored."

Rex's eyebrow went up further at that last one. "Wait so...what? It's a remote for emotions?"

César shrugged. "Basically. You place this device," He held up the piece he'd just finished. "...somewhere on your person, and using the controller, you become completely dominated by whichever emotion is currently displayed."

Rex nodded, genuinely interested. This thing sounded weird, but kind of cool. Though... "So what's the point of it? Like...I can't imagine why someone would want that."

César shrugged. "I suppose if you put them on soldiers in the "anger" setting, it could lead to more aggressive battles...hm..." He put the items back on his desk and held his chin in his hand. "Actually, before sending this to him, I should probably call Bortel and find out why he wants them...don't want to aid in anything sinister by accident!" He almost added "especially not after last time!", but somehow held it in. Rex wouldn't take it too well.

Rex watched César leave, mumbling a quick "I won't be long!" before exiting the room. He glanced back over at the devices on César's desk.

He reached over and picked them up, glancing at each object individually before a smirk appeared on his face.

"So he needs to test it on someone, huh?"

Six lifted his head from the ridiculous amount of paperwork he was doing as he felt a presense enter the room.

He glared at the wall in his line of sight as he felt said presence get closer.

Just as it was about to reach his personal space bubble, he growled and turned around. "Rex, what are you doing?"

Rex jumped back. "I was just...um..." He rubbed the back of his head. "I was just testing your ninja skills! You pass! Later!" He ran out of the room.

Six stared at where Rex once was and let out a long sigh. Rex was up to something...probably something awful and he was going to be at the receiving end of it, he just knew it.

Doctor Holiday pulled away from the microscope, grabbing her current clipboard and jotting down a few notes about the organism she was studying.

She was so focused on her research that, not only did she not notice Rex enter the room, but she didn't realize he was there until he had an arm around her shoulders. She jumped and quickly sent him a frothy glare, picking his arm up and off of her.

"Rex! Don't scare me like that!"

Rex held his hands up innocently. "Sorry, Doc! I thought you knew I was there, I swear!"

She rolled her eyes. "Did you need something?"

Rex did his best to hide the evil smirk he wanted to let loose. Holiday hadn't even noticed the small device that had attached itself to the back of her neck. "Mm...nah, I think I'm good."

She was prepared to give him a small speech about wasting her time, but the doctor held it in and turned back to her work.

As she did, Rex pulled the controller out of his pocket. Time for the "moodulator"'s official testrun. He clicked it on and waited for the face to come up. It was yellow and looked awfully happ-

His thoughts were cut off by Holiday's loud laughter and smiling face. She turned back to him and gave him a huge hug. Rex blushed with a smile on his face. He couldn't wait to see what happened in that..."enamored" setting.

"Haha, oh Rex...I'm so happy you came to visit me!" Holiday smiled brightly and pinched his cheek. "Not that I don't love my work - it's just always fun to have company!"

Rex smirked and clicked the controller again, quickly checking to see that it was red and looked angry. He frowned and quickly noticed that the fingers pinching his cheek were squeezing a little harder.

Scratch that, a lot harder.

"Ow! Holiday, what are you-"

She roughly pulled her hand off of him. Mimicking his voice, she repeated his last few words in a whiny tone. "Oh, please, you just had to come over and waste my precious working time! I don't have a lot of time to spend on my own research with you around, y'know! All my focus is stuck on you. Rex. Providence's Not-So-Secret Weapon. Bah!"

She obviously would've continued ranting and raving, but Rex hated hearing that tone from her, so he clicked the controller again. It was blue, and sad.

He shut his eyes in pain at the sudden loud sobbing next to him. Opening them again, he saw fresh tears falling consistently down Holiday's face, and suddenly he felt like a horrible, horrible person.

She sobbed again, holding her face in her hands. "Oh, Rex...I'm-I'm so-" Sniff. "-sorry that I yelled at you! I'm such a horrible doctor...I just can't believe I would ever do that..."

As she went back to crying, Rex looked down at the controller. This device was insane. He'd never seen Holiday so crazy-emotional before. It was...scary.

He had two emotional states left. Hoping for the lovey one, Rex clicked again, only to see a purple face covered in question marks. Well, that answered that.

Holiday's sobs suddenly stopped, so Rex turned back to her. She stared at him and tilted her head to the side.

"...Rex?"

He looked left and right awkwardly, before nodding slowly. "Uh...yeah, Doc, right here. Do you know where we are?"

She already had a hand on the side of her head; face looking completely confused. "Wait...what do you mean by..."where we are"?" She scratched her head and kept going back until she hit her bun. Her eyes widened at reaching the hairtie, and she quickly pulled it out, letting her hair flow down.

Rex stared, wide-eyed. She hadn't let her hair down in front of him since they first met. Man, did it make her look double pretty.

He chuckled at her; she was starting at the hairtie and repeatedly stretching and unstretching it.

But no, he'd had enough of laughing at her. Now it was time for the real fun to begin.

He clicked it once again, checking that it was indeed, pink and covered in hearts - it was. He smiled brightly and turned back towards the doctor, eyebrow raised seductively.

Her eyes were sparkling and she was looking off into the distance. Rex tried to move in front of her, but her focus never faltered. She wasn't looking at him! What up?

As soon as she let out a dreamy sigh, Rex figured something must be wrong with this setting. Nothing my nanites can't fix... he figured. Putting a hand over the control, Rex let his little computers do their work.

And as the blue lines covered the small controller, Rex quickly noticed that something was wrong. The controller suddenly made an unfortunate-sounding noise and one of the buttons burst from the front of it.

Uh-oh.

He tried to click the controller into another setting, and it wouldn't budge. Holiday was stuck being completely love-struck.

But this begged the worst question: who was it over if not him?

He frowned, knowing this wouldn't be good. "Um, Doc...?"

She giggled and held a hand cutely to her lips. "Yeah, Rex?"

Screw subtlety. That wasn't his style. "Who are you thinking about?"

A pause, and then her smile got ridiculously big and she blushed deeply. "Oh...I was just wondering what Six is up to...maybe I should go find him..."

His jaw hit the floor. Six? DID SHE JUST SAY SIX? She was in love with Six oh God oh God this was not good this was no...wait.

Waitwaitwait a second! This...this could be gold.

He looked up at Holiday, who, after contemplating for a bit, pressed on her com. "Hey Six?"

A muffled voice on the line answered, "Doctor?"

She smiled slightly and blushed again. Wow, just his voice could do that much when she was like this. "What are you doing...?"

There was a pause before an answer. "Paperwork. Why, do you need something?"

She giggled, accidentally forgetting to turn off the comm beforehand. Six was probably very disturbed. "Just wondering if you were busy...mind if I visit?"

The pause was much longer this time. Rex desperately wished he could see Six's face. "Um...I suppose not."

Holiday smiled brightly. "Okay! See you in a minute!" She removed her hand from the com and headed out the door. "See you later, Rex!"

The young EVO was glad he hadn't turned away - he caught a lovely glimpse of Holiday twirling out the door.

Oh, he was following her. There was no passing this up.

This'll probably be a two-shot. Just uh fyi. Lots of Holix in the next chapter ahahha