AN: I apologize for how long this chapter took for me to finish and upload. Here is the De-aging to the age of 3, chapter. The next chapter he will have the ability to willfully change his gender from male to female and vice versa which I have not started on yet.

Shawn woke up on the floor of the bathroom within the SBPD at around three in the afternoon. He remembered feeling as though he was going to pass out and heading towards the bathroom however; within the bathroom stall darkness overcame him and he had lost consciousness. Groggily Shawn started to stand up putting his hand to his throbbing head.

'Whoa, the door looks a whole lot taller than it was before.' Shawn thought as he carefully got to his feet. Standing on the tips of his toes he clumsily started to unlatch the lock on the stall door and pushed the door open with more difficulty than before. Shawn's eyes widened when he stepped out of the stall.

'The door isn't the only thing that's taller.' Shawn realized and he swallowed thickly. 'Everything is taller than me. I need a mirror.' Shawn figured as he tried to find a way to climb atop the counter in order to look in the mirror. A sturdy pot holding a large fake plant was close enough to the counter for Shawn to be able to use it as a step-stool in order to get up on the counter. He balanced precariously on the lip of the pot and scrambled onto the counter. He lifted his eyes to the mirror and got a big shock. He was a toddler and somehow Shawn knew exactly how old he was.

"I'm thwee." Shawn mumbled frowning at his pronunciation of such a simple word.

'I'm physically three? How in the hell could that happen? One minute I am my normal thirty-five year old self and the next thing I know is I'm three?! I even sound like it!' Shawn thought inwardly beginning to panic. The panic started taking control and Shawn did the only thing his three-year old mind could think of and that was to suck in a big breath and yell for help.

"Wassssssssssie!" Shawn wailed.

-Around Same Time Carlton's Desk-

Carlton Lassiter was at his desk going over crime scene photos from a cold case with his partner Juliet O'Hara when their investigation of said photos was interrupted by Carlton.

"Did you hear that?" He asked when he heard what sounded like a thud.

"Hear what Carlton? I didn't hear anything." Juliet responded distractedly.

"Wassssssssssie!" A child's voice rang out shattering the peaceful quiet of the nearly empty station. Juliet and Carlton's eyes widened.

"I definitely heard that." Juliet said.

"Me too, and it sounded like it came from the men's bathroom." Carlton said swiftly getting to his feet and took off at a run the direction the child's voice came from. When he came to the oak bathroom door he silently closed his other hand around the doorknob and quickly shoved the door to the men's bathroom open only to freeze when he saw a distressed child balanced unsteadily on the bathroom counter. The boy's brown hair was in disarray and his green eyes were wet with unshed tears and hanging from his thin frame was a large shirt, obviously made for a grown man, not a small child, and nothing else, no pants no underwear, nothing. Upon seeing the gangly detective the small child looked immensely relieved.

"Wassie, hewp me. I can't get down." The child said reaching out towards Lassiter. Carlton lifted the boy off of the counter and the kid swiftly put his arms around the detective's neck.

"Do I know you?" Lassiter asked the three-year old.

"Wassie, it's me, Shawn. I may not wook wike it or sownd wike it but I am." Shawn said giving Carlton a shocked look.

"Uh huh sure you are. How much did Spencer pay you to pretend to be him?" Carlton asked looking irritated. Tears filled the toddler's eyes making Carlton uncomfortable.

"But, it weally is me Wassie." The child wailed looking as though he was going to cry any second. Lassiter looked thoughtful for a second then he responded and his answer filled Shawn with hope that Carlton would realize it really was him and not an elaborate joke.

"Prove that you really are Shawn Spencer." The detective said smugly. Shawn smirked as he thought of the most awesome plan to get Lassiter to realize it was truly him.

"How 'bouts a DNA test?" Shawn offered just as smugly knowing that the results would be a one-hundred percent match.

"Fine and I won't leave so I would know if the results are falsified." Carlton snapped irritated that the small toddler thought of that simple solution before him.

-About an Hour Later (having gotten Shawn dressed in clothes that fit and sent O'Hara home): Autopsy-

"Alright Shawn you're going to feel a slight pinch." Woody said positioning the small needle of a syringe above his arm. Since Shawn did not enjoy pointy objects, he turned his head away from the seemingly large needle.

"J- just get it over with." Shawn said shakily as if Woody was holding a gun instead of a relatively tiny needle.

"Oh, stop with the dramatics. It's not like that little needle is going to kill you. Besides, you're the one who suggested we do a DNA test.' Lassiter said heatedly.

"But, when I said to do a DNA test I thought Woody was gonna schwab my mouf." Shawn whined sounding like he was going to cry.

"Swab him." Lassiter ordered in annoyance just wanting Shawn to shut up.

-Two Hours and a Chocolate Bar Later (supplied by Carlton's desk)-

Shawn and Lassiter were sitting at the detective's desk, well, Carlton was sitting Shawn was spinning around lazily in a computer chair. The sound of footsteps reached Carlton's ears and he jumped off the chair and spun around just in time to see Woody rushing towards them with an excited gleam in his eyes.

"Detective!" He called as he came to a stop in front of the desk.

"Well Woody, stop just standing there. Do you have the results?" Lassiter snapped impatiently looking irritated.

"Oh, the results, that's why I came up here. The DNA test results are a perfect match for Shawn Spencer." Woody reported enthusiastically.

"Wha- what?" Lassiter spluttered in shock.

"I towd you so Wassie." Shawn said trying to stifle a yawn.

"Someone looks tired." Woody observed. "Well, good luck with little Shawn." He said to the detective as he started to walk back to the Morgue. Lassiter turned around and saw Shawn curled up fast asleep in the chair with his thumb in his mouth. Thinking no one else was in the station, Carlton let a rare smile grace his face as he took in the site of Shawn sleeping. A voice sounded behind the detective catching him off-guard.

"I didn't know you had a son detective. He's adorable." Buzz McNab said with a smile.

"I don't have a son McNab. This is Spencer." Lassiter hissed confusing Buzz.

"Oh, then is he your nephew or something?" Buzz asked in confusion causing Carlton to let out a groan.

"No he is not my nephew. This is Shawn Spencer. You know, irritating man who claims to be psychic." The detective said pinching the bridge of his nose, starting to lose his patience.

"Oh, do you think that Black woman caused this? Shawn did look a little pale earlier when he headed for the bathroom." Buzz asked.

"Wait, what time did you see him go into the bathroom?" Carlton asked. "Knowing that information, we might be able to tell how long it took for Shawn to de-age." Buzz mumbled thoughtfully too quiet for the detective to hear. He closed his eyes thinking back to when he saw Shawn go into the bathroom.

"I saw him head towards the bathroom at around two. That's when you asked me to get you coffee from the Café," Buzz replied. They both turned around towards a sharp squeak and saw Shawn shift uncomfortably, thankfully still asleep, in the chair.

"We should look into this in the morning McNab. I'm taking Spencer home. Hopefully he sleeps throughout the night." Carlton stated as he scooped the psychic into his arms.

-9:00 pm Lassiter's Residence-

Carlton woke with a start and groggily looked around trying to figure out what had caused him to awaken and heard faint screaming coming from the guest bedroom he had placed Shawn in two hours ago. Fearing the worst, Carlton slid his hand under his pillow and swiftly drew out his gun he had hidden there. He crept towards the guest bedroom gun drawn and ready for whatever he should meet. However, he wasn't ready to see Shawn twisting and turning on the bed whimpering and screaming in his sleep. Carlton placed his gun on the side table before heading to Shawn's side. He placed his hands on Shawn's shoulders and gently started to shake the whimpering psychic awake. Shawn awoke with a start eyes frantically darting everywhere before his terrified expression melted away to recognition, embarrassment, and guilt. 'Wait, guilt? Why is he feeling guilty?' Carlton wondered.

I'm sowwy." Shawn mumbled averting his gaze missing the detective frown in confusion.

"Sorry? You were having a nightmare. You don't need to be sorry Spencer" Lassiter said.

"I'm usoly not that woud." Shawn wailed green eyes filling with tears.

"Usually not that loud?" Carlton reiterated with a sigh. "How long have you been having these nightmares Spencer?" Carlton asked worried. Shawn said nothing for a long while which caused the detective's concern to increase. Finally he spoke but it was not something the detective expected.

"I'm not si-kik." Shawn stated voice hoarse from screaming so much.

"That doesn't answer my question at all." Lassiter huffed interrupting the child.

"You wood undewstand if you actowly wisten to me Wassie." Shawn complained with a pout. The detective sighed. 'Spencer might be right about that.' Lassiter sat down on the edge of the bed letting out another soft sigh.

"Okay, Okay. Say what you were about to say Spencer." The older man ordered. Shawn gulped and calmed himself before starting his explanation.

"I'm not si-kik. I just have an ediec memwy. I member evwything that has ever happed to me. Sometimes I replay the bad things that have happed to me." Shawn said softly.

"So it's not nightmares it's memories." The detective said quietly, too quiet for Shawn to hear.

-Two days later SBPD-

Finally Lassie and Shawn convinced everyone that Shawn was indeed Shawn Spencer and the kid was still as annoying as hell. Well, in Lassiter's eyes at least. Lassiter pinched the bridge of his nose in irritation.

"No, Spencer" Lassiter snapped, "You can't have a pineapple smoothie. You will ruin your appetite. Just wait five minutes for me to finish my paperwork and we can leave for lunch."

"But Wassie" Shawn started to whine but stopped when he saw lassiter's face, "Fine." Shawn sighed before going off to bug other people. Shawn's eyes lit up when he saw the station's biggest sucker, Buzz McNab. Shawn ran up to Buzz and started tugging on the other man's pant leg.

"Oh hey Shawn" Buzz said with a smile. "Is everything okay?" He asked looking down at the kid.

"I'm weally firsty Buzz can I has a Pine-pole smoofie?" Shawn asked with an innocent look on his face.

"Sure. I always have some around just in case you want one." Buzz said taking his leave only to return about a minute later with the heavenly refreshment. Shawn's eyes went wide with delight and grabbed the offered drink.

"Tank you shweet God of Pine-poles!" Shawn squealed running off with the pineapple smoothie taking a large gulp along the way.

Lassiter frowned as he saw the three year old psychic running down the hall with some sort of drink in hand.

Shawn came to a stumbling stop in the middle of the room close enough for Lassiter to see Shawn's ashen face. Lassiter caught he toddler as he let out a moan and started to fall forward. The Pineapple smoothie was now forgotten as it slid from Shawn's hand and spilled over splattering the floor and Lassiter's pants.

"Spencer . . . Spencer, what happened?" Lassiter asked the kid panting in his arms. Shawn groaned again.

"Huwts, evwything huwts." Shawn rasped with a moan.

'What the hell was in that cup?' The detective thought worriedly.

The sound of footsteps approaching swiftly brought the detective back from his thoughts. He glanced up to see Buzz rushing towards them.

"What's wrong?" Buzz asked worriedly. Lassiter sighed and opened his mouth to respond but was silenced by the sound of Shawn moaning louder in pain accompanied by the sound of ripping.

"W- what the," Buzz started staring at the scene before him eyes almost bulging out of his head.

"Hell." Lassiter breathed just as shocked because the psychic was now back to normal and butt naked.

"L- Lassie," Shawn murmured. "Pineapples are the cure for everything."

Shaking himself out of his stupor Lassiter took off his suit jacket to cover the bare psychic who was shaking slightly not noticing that Buzz had already fled after the awkward scene of Shawn changing back.

"Wait a minute. Pineapples?" Lassiter muttered. Realization dawned on the older man. "God damn it. If I gave you that smoothie the first time you whined for one you would have changed back the first day." Lassiter growled in annoyance. Shawn just grinned in response before asking Lassiter a question of the upmost importance.

"So Lassie, are we still getting lunch? I'm starving." Shawn asked. Lassiter rolled his eyes.

"Fine Spencer but you are going to put clothes on first." Lassiter said walking away leaving the younger man in the middle of the station with only a jacket to cover himself with.

AN: Next Chapter is the only gender-bending chapter. And the chapter after is the final chapter of The Transformation of Shawn Spencer. In that one Shawn will become a werewolf. Have not started on this yet but have some ideas.