A/N: Hello. :) So, have you watched either Monsters, Inc. and/or Inside Out? If so, were you curious about what would happen if Riley Andersen arrived in Monsters, Inc.? Well, I just recently finished the first 4 chapters for the story so you can find out. :) Now, most of these chapters are relatively the same, apart from the inclusion of the alternate introduction for Sulley and Mike in certain intervals, that is. :) Now, the main cast for this story are as follows below:

John Goodman as James P. Sullivan

Billy Crystal as Michael Wazowski

Kaitlyn Dias as Riley Andersen

Jennifer Tilly as Celia

Steve Buscemi as Randall Boggs

and James Coburn as Henry J. Waternoose III

Good setup, huh? :)

Disney/Pixar's Inside Monster's Inc

Chapter 1: Monster in the Closet/Morning Workout

It all started one night as a child was getting tucked into bed.

"Good night, sweetheart.", the mother spoke.

"Good night, Mom.", the boy responded.

"Sleep tight, kiddo.", the father spoke before the bedroom light clicks off.

Soft moonlight illuminated the room as a little boy snuggled into bed as his parents' footsteps fade away down the hall. All was quiet until the closet door creaked open. The boy looked around the room nervously, eyes growing wide. Suddenly, he noticed a tentacle, emerging from the closet. The boy turned away in fear, but a second look revealed it to be just a shirt sleeve before he relaxed back into bed. Suddenly, a dark shadow cut across the bedspread. From under the bed, a pair of evil red eyes peered out. Rising up behind the boy, preparing to scare his young victim, towered a fearsome monster. The boy snapped awake as a huge, scary monster crept up to his bed and spread its arms wide, preparing to roar. Then, the boy noticed the monster and screamed. The monster, horrified by the child, then let out an even more blood-curdling scream of his own as the boy's scream scared the monster and he staggered back and slipped on a soccer ball, which ricocheted off the wall and hit him squarely on the face, causing him to stumble back onto a skateboard, slip, and land on a pile of jacks. Crazed with pain, the monster ran around the room, screaming and holding his backside, even spinning around.

"Simulation terminated. Simulation terminated. Simulation terminated. Simulation terminated. Simulation terminated.", the computer voice spoke as suddenly, the lights came on and the bedroom wall opened up.

The boy turned out to be just a robot as he winded down and reset and the monster was a trainee. It turned out that the bedroom is a set, a simulator where monsters practice their scare tactics. Behind a control console sat a scare instructor, the dragon-like Ms. Flint, who then spoke with the trainee in question.

"All right, Mr. Bile, is it?", Ms. Flint asked.

"Uh… My friends call me Phlegm.", Bile responded.

Monster Bile was learning to scare children at Monsters, Inc., the largest scream-processing factory in Monstropolis.

"Uh-huh. Mr. Bile, can you tell me what you did wrong?", Ms. Flint asked.

"I fell down?", Bile guessed.

"No, no, before that.", the scare instructor responded exasperatedly before she turned to the class of trainees seated behind her.

"Can anyone tell me Mr. Bile's big mistake Anyone?", Ms. Flint addressed only for the trainees to stare back at her blankly as one of them coughed before Ms. Flint groaned in frustration and rewound the tape before playing it.

"Let's take a look at the tape. Here we go.", Flint spoke.

On the monitor, as he snuck into the bedroom, Mr. Bile had left the closet door open. The image then froze at where Bile made his apparent mistake.

"Uh, right… Puh-puh-puh-puh… Ah! There, see? The door. You left it wide open.", Ms. Flint explained.

"Ooh!", the trainees spoke in understanding.

"And leaving the door open is the worst mistake any employee can make because…?", Ms. Flint began.

"Um… It could let in a draft?", Bile guessed.

"It could let in a child!", the voice shouted as the source stepped in from the shadows.

The trainees spun around to see Mr. Waternoose, a crab-like, five-eyed President of Monsters, Inc, at the back of the room.

"Oh! Mr. Waternoose!", Ms. Flint spoke in surprise.

"There is nothing more toxic or deadly than a human child. A single touch could kill you!", Mr. Waternoose shouted before Bile shuffled nervously away from the animatronic kid.

"Leave a door open and a child could walk right into this factory! Right into the monster world!", Mr. Waternoose continued before one of the recruits lost it, leaping into the lap of the monster next to him.

"I won't go in a kid's room! You can't make me!", the recruit panicked.

"You're going in there because we need this.", Mr. Waternoose retorted as he grabbed a nearby yellow scream can before he uncorked the can, causing the sound of children's screams to leak out.

The lights surged while the monitors crackled with the recruits covering their ears, even Bile, before Waternoose corked the can back in and put it down as he explained further.

"Let me remind you kids are dangerous, unstable sources of energy. If a kid ever got through one of our doors, the results would be catastrophic.", Mr. Waternoose explained.

"If I let in a kid, I bet I could catch it.", the recuperating recruit whispered.

"You can't touch a child, they're toxic! Use your heads! Contact with any child is deadly!", Mr. Waternoose warned before the recruits understood as they "oh'd".

"Now, we're in the middle of an energy crisis. I need to know that I can count on you to do the job with all you've got. I need Scarers who are confident, tenacious, tough, intimidating. I need Scarers like… Like… James P. Sullivan.", Mr. Waternoose continued.

Meanwhile, the company's best scared, an intimidatingly large, hairy, blue-spotted monster with horns, sharp teeth, and sharp claws named James P. Sullivan, or Sulley for short, was snoring loudly, fast asleep next to a radio as it clicked on at 6:05 AM.

"Hey, good morning, Monstropolis. It's now five after the hour of 6:00 A.M. in the big monster city.", the Radio DJ spoke before it turned out that the DJ was actually his friend, Mike Wazowski.

Mike was a little green ball of a monster with green frog-like skin and one enormous eye standing casually next to Sulley's bed.

"Temperature's a balmy 65 degrees, which is good news for you reptiles and, it looks like it's going to be a perfect day to maybe, hey, just lie in bed, sleep in or simply... Work out that flab that's hanging over the bed! Get up, Sulley!", Mike shouted before he put a bull horn to Sulley's ear and set it off, shocking him awake as he screamed.

Later, Sulley then landed on his feet, cracked his knuckles, growled, and flared before he roared with his hands raised and his fangs and claws bared.

"Let's hit it!", Sulley spoke before he dropped to the floor for push-ups as Mike stood in front of him, barking orders like a coach.

"That's it, buddy. Work it, work it, work it, work it! You are number one, 'cause you get the job done!", Mike barked.

"I don't believe I ordered a wake-up call, Mikey.", Sulley commented.

"Hey! Less talk, more pain, marshmallow boy!", Mike retorted before, between push-ups, Sulley sprang into the air, striking a fearsome pose and roaring, with the roar getting louder with each spring.

"Feel the burn! You call yourself a monster?", Mike barked as Sulley roared before he was later jogging in place.

"Scary feet, scary feet, scary feet! Oop! The kid's awake!", Mike spoke before Sulley dropped to the ground and laid motionless.

"Okay, scary feet, scary feet, scary feet, scary feet...", Mike spoke as Sulley popped back up into a jog.

"Kid's asleep!", Mike spoke before Sulley roared.

"Twins! In a bunk bed!", Mike shouted before Sulley went up and down, roaring on two levels.

"Ooh, I thought I had you there.", Mike responded before later, he was carrying a broom with a crude drawing of a child's face taped to the end.

"Okay, Sulley, here we go. You ready? Follow it. Oh! It's over here! Oh, look over there! Don't let the kid touch you! Don't let it touch you!", Mike urged as he swung the broom with Sulley lunging after it and growling at the paper kid while dodging it before later, he was straining to push a pile of heavy furniture across the living room like a quarterback rushing a tackle dummy as Mike stood atop said pile near him.

" I don't know, but it's been said, I love scaring kids in bed! ", Mike sang like a drill sergeant before in the bathroom, he was even coaching Sulley in brushing his teeth as he stood on Sulley's arm.

"Come on, fight that plaque! Fight that plaque! Scary monsters don't have plaque!", Mike coached before Sulley was now hanging upside-down from a beam, doing some "gravity" sit-ups.

"118... Do you have 119? Do I see 120? Oh, I don't believe it!", Mike exclaimed as suddenly, a sound from the TV blared out.

"I'm not even breaking a sweat.", Sulley responded.

"Not you. Look! The new commercial's on!", Mike responded as he ran to the TV while Sulley looked at where he was headed only to slip and fall.

On the TV, a bank of lights illuminated and flared brightly before introducing the factory.

"The future is bright at Monsters, Inc.", the announcer spoke before Sulley and Mike scrambled into their chairs to watch the commercial.

"I'm in this one. I'm in this one!", Mike spoke excitedly before the TV then showed beautiful shots of monsters happily living their lives, especially the sun going down with the building's lights turning on before an M.I. worker named Betty turned to the camera as Sulley watched from his easy chair, pointing at the screen.

"We're part of your life. We power your car. We warm your home. We light your city.", the announcer spoke.

"I'm Monsters Incorporated.", Betty spoke.

"Hey, look! Betty!", Sulley spoke excitedly before the TV then showed a bored child watching as various monsters cycle past until it settles on one which causes the child to scream the most before that scream gets converted into a sort of energy into a canister, which then gets transferred into every appliance and electrical output available, whether it's lights or even a vacuum.

"Carefully matching every child to their ideal monster, to produce superior scream refined into clean, dependable energy. Every time you turn something on Monsters, Incorporated is there.", the announcer continued before it showed the floor manager named Jerry turning around to face the camera.

"I'm Monsters Incorporated!", Jerry grinned before showing a child vacantly staring at a television set with sounds of machine gun fire, explosions, screams, sirens and the like heard emerging from the set before the said child then laid his tired head onto the cereal bowl as the text "SIMULATION-NOT ACTUAL CHILD" appeared on the screen, illustrating that monsters capture the screams of children and use them to power their world, but kids weren't as easy to scare as they used to be, before showing Mr. Waternoose in the commercial with the blue hat on as the text "CEO HENRY J. WATERNOOSE, C.E.O." appearing on the screen, and Sulley opening the door, leaning through it, and roaring like a lion to scare the kid.

"We know the challenge, the window of innocence is shrinking. Human kids are harder to scare.", the announcer spoke.

"Of course, M.I. is prepared for the future with the top scarers...,", Mr. Waternoose began.

"Woo hoo-hoo!", Mike cheered with proud laughter.

"...the best refineries, and research into new energy techniques.", Waternoose continued as a monster with virtual reality glasses roared, causing a computer child on a monitor behind him to scream.

"Okay, here I come.", Mike spoke excitedly before on the TV, Sulley and Mike stood in front of a crowd of MI workers.

As they turned to the camera, the MONSTERS INC. logo appears over Mike, blocking him entirely with Mike staring at the television, shocked.

"We're working for a better tomorrow... today!", Sulley spoke.

"We're Monsters Incorporated!", the workers spoke as the screen faded to black, leaving only the logo as it zoomed in and zoomed out before the words, "Monsters, Inc. We scare because we care." appeared below the logo.

"We're M.I.- Monsters Incorporated. We scare because we care.", Mr. Waternoose spoke before Sulley turned off the TV.

"I can't believe it.", Mike spoke in shock.

"Oh, Mike...", Sulley consoled.

"I was on TV! Did you see me? I'm a natural!", Mike shouted excitedly before the phone rang with Mike grabbing the phone.

"Hello. I know! Hey, wasn't I great? Did the whole family see it?", Mike asked over the phone before he turned to Sulley.

"It's your mom.", Mike spoke to Sulley before turning back to the phone.

"What can I say? The camera loves me.", Mike grinned.