The gang then takes off down the halls. While they were there, they fought a couple of Unversed, but they weren't a huge threat. 

As they were entering the Laugh room, Mike was singing an alternate version of "Put That Thing Back Where It Came From, Or So Help."

Mike: Gotta send her home right now, or so help me... So help me! So help me!

Gray: Why is he singing?

Sulley: It's his thing.

Wendy: Hey, Sulley. What do you do here exactly?

Sulley: Well, I'm the CEO of this place. So, Monsters Incorporated used to rely on scream power from human kids for energy, powering homes and businesses so that we could live a comfortable life.

Lucy: I guess it's good. But it's still bad to scare kids.

Sulley: Yeah, that's what I thought after I met Boo, but then we discovered the power of laughter. Now we collect their laughter instead. It turns out laughter's ten times more powerful.

Natsu: So any loud voice noises from people can make energy? Then this job is perfect for me!

Gray: (sarcastic) Yeah, you'll blow away the monster's eardrums.

Natsu: You want to say that again?

Natsu butted heads with Gray until Erza hit them on the heads, making them stop.

They continued to walk until Boo stop them.

Boo: Kitty!

She was jumping and pointing at the entrance to the laugh floor. She then ran towards the entrance.

Sulley: Glad we have laugh power. And we'd never have figured it out without Boo.

Erza: Yeah, she is a cute little girl.

Sora: Cool.

Goofy: Our ship's powered by laughter, too! Guess we've got that in common.

Donald: Sora's a laughter machine!

Sora: (chuckles in embarrassment) Come on, I am not.

Kat: Everyone laughs at the guild, too! We bring the joy out when life gets tough for someone. It's why I like Fairy Tail.

They then heard some noises coming from the Laugh Floor.

Laxus: I think those monsters are spurring up trouble again.

They entered the Laugh Floor. It was a huge room with windows on the ceiling, desks on the left side of the room, and doors lined up on the right side of room. There are some posters that encourages laughter to boost morale.

What they saw were Unversed using the Laugh Floor for their own purposes. They grabbed some laugh tanks and attached them to a machine that's next to a door. 

The Unversed enter the door and the group can hear children screaming from the door. A red line on the tank went up until it reached the top and that's when the Unversed came out of the door.

Drake: Unversed are back!

Lucy: They're scaring the kids for power!

Wendy: That's so mean!

Natsu: Hey! Those doors don't belong to you!

Erza: Everyone, save the children!

Sulley and Mike watched in horror as the Unversed continue to scare children. Boo ran hid in a nearby area.

Sulley: This is terrible!

Mike: (gasp) Look, there's Boo's door!

He pointed at a white door with flowers as the machine took the door to another room.

Mike: Go get Boo!

Boo looked afraid while she was trying to find a hiding spot. Sulley grabbed her and hid her behind a nearby desk.

Sulley: We'll have to play another time, Boo. You stay here. (ran towards the group)

Sora: Ready to clean the house?

Sulley: Yup!

Before another Unversed could scare another kid when it entered, Natsu went through the door and burt it.

Natsu: What part of this are you not getting?! (shuts the door) 

When Natsu came out, almost all of the Unversed were gone.

Mike sees a Unversed that looks like a snake and flower slivering to a door known as a Flowersnake.

Mike: Another one is going through the door!

Lucy: I got it! (through the door in her Cancer Mode)

When she entered, she sliced the Unversed. She then looked up and saw a teenage boy on his bed, playing a video game. She looked at the screen and saw a woman holding a gun and building things.

Boy: Don't distract me! I'm close to be the last survivor of this round! Oh, come on, why would you destroy the fort, god dammit, man!

Lucy, looking stun and confused, turned around, walked straight towards the door, and shut it. She then saw Sora slashing the last Unversed in the area.

After all of the Unversed were defeated, Mike ran up to one of the machines and swipe a card on it, revealing the numbers 203238. He did with almost every machine in the room. 

After swiping the cards, doors appeared on a crane machine and each one was brought to a machine on the floor. The platforms on the floor rose up and grabbed the doors that were hanging from the ceiling and brought them down onto the floor.

Mike: Ride's here!

Sulley: Nice. (went to get Boo)

Happy: So cool!", said Happy.

Mike: That's how we get the doors into the Laugh Floor when we work. We bring doors here so that we can enter the kid's rooms through their closet. When the light at the top of the door is red, that means that you can enter the room.

Erza: Where do these doors come from?

Mike: That hole on the top right corner leads to a giant room filled with other doors, each one leading to a kid's room. Anyway, grab on to the door when you're ready.

The four Dragon Slayers looked sick upon hearing that.

Natsu: Ride...on...that?

Sora: Oh, yeah. I forgot.

Lucy: There's no way we could get her door without dealing with a Dragon Slayers belly.

Happy: We can carry you guys.

Happy Carla, and Panther Lily came up to them.

Natsu: Thanks buddy.

Juvia: What about Laxus?

Wendy: Troia!

Wendy then cast a spell on Laxus, which relieves him of motion sickness.

Wendy: There. Now he can ride on the doors without getting sick.

Laxus: Thanks, kid.

Natsu: Alright, let's go!

Mike: Alright everyone, grab onto a door!

Sora jumped onto the top of a nearby door and held a firm grip. Laxus also hopped onto the door Sora was on. The others did the same thing with the other doors in the room: Donald and Goofy on one door, Modeus and Kat on another, Lady and Trish on another, Erza and Lucy on another, and Gray and Juvia on another. 

Sulley also grabbed onto a door, with Boo in his arms. Kat also had Drake in her arms. 

Drake: You don't have to do that, you know. 

Kat: (smile) Right, if you were older. (Drake pouts) 

Happy, Carla, and Panther Lily summon their wings and grabbed Natsu, Wendy, and Gajeel respectively.

Sora: Ready!

Mike headed towards the control panel and pressed a key on the panel. The machines that held the door onto the floor began to separate and the door was lifted into the air, making Sora chuckle a little while Laxus smiled. 

After that, Mike did the same thing with the other doors and everyone was lifted into the air. When Sulley, Modeus, and Boo were lifted into the air, Mike grabbed onto Sulley's tail and was pulled into the air as well. Boo was giggling with excitement as Mike climbed onto Sulley's back and held a firm grip.

Sulley: Boo? Hold on. Don't want you to get hurt.

Happy: Aw, you're like a concern parent.

All the doors were hooked onto the rails on the ceiling and they rapidly move forward towards the large hole in the wall, surprising everyone with excitement.

Natsu: Let's go, Happy!

Happy: Aye, sir! 

The Exceeds flew the Dragon Slayers towards the doors.

Mike: Boo's door, here we come!

Unknown to the others, an invisible creature entered the room. 

???: Oh, I just got a great idea.

The creature became visible, revealing to be a purple, lizard-like monster with green eyes, four arms, four legs, a blue tail, and his head consists of three pink protuberances.

When the group enter the Door Vault, it was a very large room filled with doors laying on the ground, hanging on the walls, or being moved around on the rails. Everyone was amazed at all the doors that were everywhere.

Lucy: My god...

Lady: Woah! Look at all the doors!

Natsu: Holy crap! That's a lot of doors!

Erza: So all these doors connect to every children's closet in the world?

Mike: Yup. And they make more!

Happy: Hey, I wonder if we could find Lucy's closet somewhere.

Gray: Now's not the time.

Wendy: Sulley, can you see Boo's door?

Sulley: (looks around) I can't see it. It's gotta be somewhere.

Suddenly, the Vermilion Samba, Marine Rumba, and Gold Beat Heartless appeared in front of them.

The Heartless began firing fire, water, and lightning attacks.

The group: Heartless!

Mike: Not here too?!

Sora: Keep Boo out of harm's way. We'll handle the bad guys! (summons his Keyblade) Laxus, want to give me a hand?

Laxus: Against them? No problem!

Erza: Let us help! (requipped into her Lightning Empress Armor while Lucy summon her whip) Natsu! Wendy! Gajeel! Protect Mike, Sulley, and Boo!

Dragon Slayers: Roger! 

Gray: Water Slicer!

Juvia fired her water slicers at the fire Heartless while Erza and Gray combined their lightning and ice attacks and defeated most of the water Heartless.

A lightning attack was heading straight towards Sora, but Laxus moved in front of him and took a direct hit.

Sora: Laxus!

Laxus: It's fine. It feels nice. Want to finish these guys off?

Sora was surprised, then he smiled.

Sora: You bet!

Laxus: Lightning Dragon Roar!

Laxus unleashed his lightning breathe attack while Sora casted Thundara. The two lightning attacks combined into one and destroyed all of the lightning Heartless.

Laxus: Not bad, kid

Sora: Yeah, you too!

Some Heartless appeared in front of Mike and Sulley, but Natsu and Gajeel began attacking them.

Natsu: Fire Dragon Iron Fist!

Gajeel: Iron Dragon Sword!

Natsu destroyed some of them with one fire punch while Gajeel destroyed the rest by slicing them.

More Heartless appeared near Mike and Sulley, but this time they were wind Heartless known as Malachite Bolero. 

They moved past Natsu and Gajeel and headed towards the two monsters. Before they could reach the two monsters, Wendy appeared in front of them with air in her mouth.

Wendy: Sky Dragon Roar!

A blast of air came out of her mouth and destroyed all of the wind Heartless. With the monsters gone, Boo looked at Wendy and giggled with excitement.

Boo: Dragon!

Wendy: Are you alright?

Boo nodded with a smile.

Mike: Here's our stop!

Mike pointed at a nearby platform with station lights and doors on it. They all jumped off from their doors and landed on the platform. 

When they landed Mike, Sora, and Wendy went to a door leaning against the wall. Mike open it and it revealed to be the wall.

Mike: It's offline! We have to power it up!

Juvia: How do we do that?

Mike: We enough laugh power to get it back online.

Suddenly, more Heartless and demons appeared behind them, making the group prepare for battle. These demons are consider of Cacodemons and Prowlers.

Lady: Demons!

Sulley: (holding Boo) Don't worry. I'll watch Boo.

Mike: Guys, we gotta make Boo laugh to open the door!

Happy: Let's defeat them in funny ways!

Drake: I got an idea. (grabs Mike like a ball) 

Mike: Hey, what are we doing?!

Drake threw him at the Heartless and the demons like a bowling ball. Mike yelled as he knocked all the Heartless and demons away and became dizzy when he stopped. 

Mike: (put his hands on his head) Whoa, am I dizzy.

Drake: Strike!

After seeing that, Boo was laughing really hard.

Carla: Did it work?

Sulley looked at the door and saw a red light glowing at the top of the door. Sulley opened the door, revealing to be another platform.

Sulley: The door's open! (passed through it)

Everyone ran after him, leaving with Sora shutting the door when he was the last one to pass through it. When they entered through the door, Sulley looked up and saw a white door with pink flowers on it.

Sulley: Boo's door!

Mike: (faced the group) Ready? It's time to hitch another ride.

Gajeel: Hell yeah!

Everyone grouped with the same partners from before and grabbed onto a random door. Everyone searched the area for a white door with pink flowers. While searching, Mike then saw a white door. He squinted and saw some pink flowers on it.

Mike: There's Boo's door!

Erza: Everyone, jump onto another door!

Erza let go of the door and grabbed onto another door.

Lucy: What?! 

Natsu: Let's go, Lucy!

Lucy: Ugh, fine! (jumped onto the door Erza was on)

Everyone that was holding onto a door did what Erza said and they all jumped onto a new door. The white door then headed towards inside a tall building along with other doors.

Ur: It's going into that building!

Mike: There's a door that connects to that building! (points on a nearby platform that was near the building) We can land on that platform to get to the door.

Laxus: Everyone time to get off!

They all let go of the door and landed on the platform. Seeing the door, that Mike mention, leaning against the wall, they all entered the door. After passing through it, they were in a construction like room with large crates, metal polls, and doors handing on the wall behind them.

Mike: Boo's door should be right around here somewhere.

Everyone then searched the room for the door. Happy, Charle, and Lily checked the top area on the doors while the rest were on the floor looking. When Sulley went around a corner, he saw the door leaning against the wall. Everyone then followed Sulley.

Sulley: There it is!

Drake: But how did it end up here?

Modeus: Somebody must've taken it off the rail.

Sulley immediately open the door and entered it. Everyone then entered the door until Wendy stopped in front of the door. She looked around the area before she went through the door.

Carla: Wendy, come on!

Wendy: Coming! (thoughts) That's weird... I can smell someone else's scent here.

When she went through the door, she shut it behind here. When there was no one in the room, the flowers on Boo's door began to move. 

They curved towards the right and they disappeared, revealing to be the purple monster from before. He smiled menacingly before he hurried through it and slammed it shut. 

*Outside the other door*

Everyone made it through, only for them to notice they are in the factory's basement area.

Mike: (confused) Wait! How'd we take a wrong turn?

Happy: Maybe it's a rift of dimensions.

Carla: I don't think that's it.

???: Who cares?

Everyone turned and saw eyes and a mouth on the door. Then, its entire body appeared on the door, it was the purple monster. This is Randall.

Randall: (smirks) All that matters...is that it's the last turn that you losers are ever gonna take.

Natsu: What you'd say?!

Erza: Easy. 

Sulley: (shocked) Randall?!

Sora: Who's he?

Sulley: A creep we banished for trying to collect screams by force. 

Lucy: What?!

Wendy: That's awful!

Sulley: Yeah. And he use to be Boo's scarer.

Boo: Rawr!

Lady: With that ability to blend in anything, that's creepy.

Mike: How did you even get back here? The door we sent you through is saw dust!

Randall: Yeah, and I almost got turned into somebody's wallet. Lucky for me, a real nice guy came along and fixed the door, so here I am.

Mike: (growls in anger)

Gajeel: Someone fixed the door? 

Randall: (smile) Yeah. (walks up to Mike) And starting today, I'm numero uno! Top of the leaderboard, baby.

Mike: Ha! (lightly punched Randall's stomach) You, a top laugh collector? In your dreams, Randall. My laugh totals are off the charts.

Happy: And you don't look like a funny guy.

Randall: Who said anything about collecting laughs?

Erza: What do you mean by that?

Randall: I'm after negative emotions.

Everyone had a shock look on their faces.

Sora: Negative emotions?

Wendy: (came up to Randall) Why do you want negative emotions?

Randall: Aw. The little dragon girl is asking why? Well, ( pinched Wendy's cheek) it's because they are the most powerful source than laughter. It worked well before when the company was collecting screams.

She responded by moving away from him while Natsu and Gray were about to attack him, but were stop by Erza. 

Randall: And my new friends have kindly invaded the factory to get 'em for me.

Ur: Your new friends? 

Modeus: The Unversed.

Donald: (to Goofy) He's gotta know.

Goofy: Yeah, Organization XIII must be helpin' him.

Laxus: I bet he knows who we are too. 

Randall: Laughter's just not sustainable. Once junior charts his last chortle, you've gotta start over. But negative energy? Especially sadness? Give 'em something at really breaks their little hearts, and they'll stay sad forever. We'll never have to worry about energy again.

Kat: I tolerate someone making adults sad, but little children?! We're not gonna let you hurt any one of them like that!

Drake: She's right! Not you, or your little Unversed helpers you, lizard-freak!

Wendy: That's right! We'll stop you!

Randall: Just try and stop me. You'll see soon enough. I am gonna be a legend around this place.

Natsu went up to him and punched his face, knocking him against the wall.

Randall: What the?!

Natsu: This guy is scum!

Randall: You're gonna be sorry when you deal with my friends!

Natsu: Why don't you just be a man and fight, you stupid big mouth!

Randall: How dare you insult me! 

Randall then took a deep breath and calm down before he then smirked.

Randall: Now, consider your careers officially over.

Mike: What?!

Randall: And that goes for the rest of you, too. (disappears) 

Sora: Hey!

Natsu sniffed the air but he then looked annoyed. 

Natsu: Big mouth got away.

Drake: Where'd he go?

The speakers in the factory were turned on and Randall's voice can be heard.

Randall: (over speakers) We're in control of this factory now. And I suggested a few improvements—some real doozies I just know you're gonna love. In fact, you're not getting out of here alive.

Natsu: Oh yeah? I like to see you try. Bring it on, big mouth!

Mike: That weasel means business! He'll never quit.

Sulley: We have got to get Boo to safety first. Then, we can take care of Randall.

Juvia: But how do we do that?

Happy: We can split up.

Gray: But we don't know this place. How will we know if one area we find is safe?

Panther Lily: Plus, this place is teaming with traps. This place will never be safe if that Randall is running.

Erza: That's right, we need to stick together.

Sulley: Wendy, can you protect Boo? These guys are going to need help.

Wendy: Of course! (Sulley handed Boo to her)

Drake: Alright. Time to find a way out!

Everyone nodded and proceeded through the factory.

Randall: (over speakers) Enjoy what's left of your miserable lives.

Chapter 61 ended.