In Rarity's boutique, Rainbow Dash is building a robot for the first time. Don't worry, she has instructions to help her out. Rarity watches her build it and asked, "Rainbow Dash, do you think that the robot will help us?" "I don't know, Rarity. Once I'm done building it, I'll show it to Twilight so she can look at it and she might send it to Princess Celestia." Rainbow Dash explained.

Once she's done making the robot, she turns it on and the eyes are bright red. The robot stood up shakily as it walked towards Rarity. "Oh my." she muttered. Before the robot could say anything, it suddenly exploded which shocks both of them. "Whoa, that wasn't supposed to happen." said Rainbow Dash. "I don't know how it exploded. Maybe you missed a piece or you made it wrong." said Rarity. "I don't know what happened either. But, I guess it didn't work on helping the other ponies for stuff. If Fluttershy saw this, she'll be scared to death." said Rainbow Dash.

...

While talking, the Book of Disney is calling them. "Did you hear that?" Rarity asked. "Yeah, it's the Book of Disney. Come on." said Rainbow Dash as she grabs Rarity and flies to the castle.

When they got there, they meet up with the others just in time before Twilight opens the book. She uses her magic to open the next chapter. The next story is Big Hero 6. Twilight began to read,

"In a city called San Fransokyo lives a genius boy named Hiro Hamada. He recently graduated high school when he was thirteen and has been getting into trouble by getting into bot fights. Bot fighting is an illegal gambling match in the city. When Hiro won the tournament, the members of the gang try to attack him. But thankfully, he was saved by his older brother Tadashi. Tadashi was mad at him for getting into stuff like this and will get himself arrested. When they try to get out of there, the police arrived and arrested everyone including Hiro and Tadahi. Their Aunt Cass got them out of jail and scolds at them for what they did. Because of this, she starts having eating stress. Hiro's actions worries Tadashi because he wants his little brother to do something better in his life instead of bot fighting. So, he decides to take him to his college. San Fransokyo Institute of Technologies."

When Twilight is done reading, she and her friends got sucked into the book.

...

They find themselves at the San Fransokyo Institute of Technologies.

"Wow, what is this place? It looks so cool." Rainbow Dash asked. "I agree. It looks like a place for people who like to invent stuff." said Applejack. "Of course, this must be the college Tadashi goes to." said Twilight. "It is? Cool! But, where are they?" Pinkie asked. "I don't know. They're probably inside or something." said Rarity. "So, can we go in?" Fluttershy asked. "Of course, let's see what's in there. I'll bet it'll be very interesting." said Twilight.

Before they can go, they saw a motorcycle driving towards them and stops behind them. The people on that motorcycle are Hiro and Tadashi. When Hiro saw them, he asked, "Are you guys robots?" "No, we're made of flesh and blood. Why would you say that we're robots?" Rainbow Dash asked. "I thought I only saw ponies like you on TV or merchandise and people make animatronics that look like you. Sorry about that." Hiro explained. "Well, we talk normal instead of talking like this. I. Am. A. Robot. Beep. Beep. Beep." said Pinkie as she imitates a robot.

Tadashi laughed and said, "That's kinda funny. You know we make robots here, right?" "I think so. I do know you guys invent crazy stuff." said Twilight. "Now that we met and my brother forced me to come here instead of bot fighting, can you tell us your names?" Hiro asked. "Of course, sometimes I forget to do that. I'm Twilight Sparkle and these are my friends. Applejack, Fluttershy, Pinkie Pie, Rarity, and Rainbow Dash. What's your name?" Twilight introduced. "My names Hiro Hamada and this is my brother Tadashi." Hiro introduced. "Nice to meet y'all." said Applejack.

"So, you girls ready to have a nice tour at the university?" Tadahi asked. "Yes!" the girls shouted. "You'll like it, Hiro. Trust me." Tadashi promised. "Ok, I believe you." said Hiro.

So, everyone went inside the university to see what it's like on the inside.

...

When they got in, Tadashi showed them the room where everyone tests out their inventions.

"Wow. I've never seen anything like this, it's amazing." said Rarity. "Everything's made out of metal. They must've worked hard to make stuff like this." said Applejack. "I agree, even I can't make stuff like that. I have to get a book about making stuff out of metal." said Twilight. "Can we look around?" Rainbow Dash asked. "Sure, go ahead. You might see my friends here." said Tadashi. "Alright!" Pinkie shouted as she runs away form the group.

She starts exploring by looking at a woman riding her fast motorcycle. Curious, she takes a peek at the bike until the woman stops her by shouting, "Hey! Who are you?" Pinkie stammered until Tadashi appears to introduce her. "Gogo, this is my new friend Pinkie Pie." he said. Gogo takes off her helmet and said sarcastically, "Welcome to the nerd lab." "Um, that's a cool bike you got there. I'll bet it's really fast, like really fast." said Pinkie. "A faster bike, but not fast enough. Yet." said Gogo as she throws the wheel into the recycle bin. "Sheesh." Pinkie muttered.

Fluttershy was looking at the guy who's making lasers, but he stopped her for her safety. "Whoa whoa whoa, behind the line please." he said. "Sorry." said Fluttershy. "Hey, Wasabi. This is my new friend Fluttershy." Tadashi introduced. "Hello, Fluttershy. Prepar to be amazed." said Wasabi as he throws an apple between two lines and was cut into a million pieces. "Wow. Did you make lasers that are invisible?" Fluttershy asked. "I sure did. I also have a system, where everything is in place." said Wasabi.

Twilight saw a woman dragging a huge black ball into her lab. "Hey there Honey Lemon. I would like you to meet Twilight Sparkle." Tadashi introduced. Honey Lemon squealed and hugged her. "Hi, it's so nice to meet you!" she squealed. "Nice to meet you too. What have you got here?" Twilight asked. "Four hundred pounds of this stuff will blow you away! Come here come here! You're gonna love this." said Honey Lemon as she makes her experiment and spray paints it on the ball. "You made a pink ball." said Twilight. "And here's the best part." said Honey Lemon as she touches the ball and it exploded, causing pink to go everywhere. "Whoa." Twilight muttered. "I know, right." said Honey Lemon as she cleans her glasses. "Not bad, Honey Lemon." said Tadashi.

Hiro looks around too as he watches the mane six having fun with this place. "What do you think, Hiro? This place is amazing!" said Rainbow Dash. "It's pretty cool." Hiro replied. "Wait till you guys meet Fred." said Tadashi. "Who's Fred?" Rarity asked.

"This guy right here!" Fred shouted right behind them. Rarity turned around and screamed. "Uh uh, it's just a suit. The names Fred. School mascot by day and by night, I'm also a school mascot." he introduced. "So, what's your major?" Hiro asked. "I'm not a student, but I'm a great science expert." said Fred. "Uh, ok. But, your costume is decent." said Rainbow Dash. "Why, thank you. The university made me wear this." said Fred.

"Girls, come here! I want to show you something." Tadashi shouted. Hiro and the mane six followed him to his office where he shows them what he invented. "So, what did you invent Tadashi?" Rarity asked. "I don't see anything." said Applejack. "You'll see." said Tadashi as he pulls out duck tape and puts it on Rainbow Dash. "What's with the tape?" she asked. Tadashi pulls the tape off of her as she screamed in pain. "OWW! Geez, what was that for!?" she cried.

Her cry signals Tadashi's inventions and out came a plushy robot. He walked towards Rainbow Dash and said, "Hello, I am Baymax. Your personal healthcare companion." "A robot? You built a robot? Cool." said Rainbow Dash. "He's not just any robot, Rainbow Dash. He's a nursing robot. I built him so he can help so many people. I want to show him to all of you. Isn't he cool? And this chip right here will make Baymax, Baymax." Tadashi explained.

Pinkie was pressing onto him and loves the way he feels squishy. "He he he. How did you manage to make him feel and look like a marshmallow?" "I am not a marshmallow. I am a robot." said Baymax. "He's also very good at hugging." said Tadashi. Pinkie immediatley hugs him, Baymax hugs her back but tighter. "Woo, he's quite a hugger." she said as she got off of his grip.

"What does he do?" Twilight asked. "He helps out the person who gets sick or hurt. For example, Rainbow Dash." said Tadashi as he brings Rainbow Dash towards Baymax. "On a scale of one to ten, how would you rate your pain?" Baymax asked. "Um, six." Rainbow Dash guessed. Baymax has her hoof and sprays some medicine on her skin to make the redness go away. "Whoa, did you just heal me?" Rainbow Dash asked. "It is my duty to help you when you get sick or hurt. Here, have a lollipop." Baymax said as he gives her a lollipop.

"When you're done and Baymax makes you feel all better. You say this. I am satisfied with my care." said Tadashi. Baymax suddenly deflats and went into his red box. "Wow, you're right. Baymax will help a lot of people and he's a good hugger." said Twilight.

While talking, they here someone coming into the office. "Tadashi, what brings you here and who are your friends?" the man asked. "Ah, professor. I would like you to meet my younger Hiro and the mane six. Everyone, this is my mentor Professor Callaghan." Tadashi introduced. "Nice to meet you, professor." said Twilight. "We're here to let Hiro take a look at this place so he can come here or not instead of bot fighting." said Rarity. "Bot fighting, huh? Well, good luck with that. My daughter dreamed of making robots when she was your age." said Callaghan.

"So, is there a way for me to get in the university?" Hiro asked. "Yes, there is. I'm attending a science fair for those who want to be at the university. Whoever impresses me with his or her inventions gets to join the university." Callaghan explained. "Alright! Let's do it!" Pinkie shouted.

"Don't worry, Callaghan. Hiro Hamada here will make the best thing he has ever invented in his entire life." Rainbow Dash promised.

...

When they were about to leave, Hiro couldn't stop looking at the university.

"I always knew you would like it. I was the same way when I first got attended." said Tadashi. "So, what did you think, Hiro?" Twilight asked. "I do. At least I know how to get in by impressing Professor Callaghan." Hiro answered. "Yeah, if you want impress him, you gotta make something good." said Applejack.

When they got home, Hiro immediatley got a journal to write on and a pencil to write with and. He didn't get any ideas after trying for a few days. "No ideas! Nothing! Stupid, useless brain!" he cried. "Come on, Hiro. We tried to give you ideas, but you deny them." said Rarity. "Why don't you use my party cannon?" Pinkie asked.

"No, Pinkie. I have to make it by myself. But, I cant. I've got nothing." said Hiro. Tadashi walked to his brother and said, "Hey, I'm not giving up on you." Then he picked him up by his feet and shakes him. "Tadashi, what are you doing?" Hiro asked. "Use that big brain of yours." said Tadashi.

While Hiro was upside down, he realizes something from the robot he made. That clicked his mind and knows what he's going to make. "What do you see, Hiro?" Fluttershy asked. "Girls, I know what to make for the science fair." Hiro replied. "What?" Twilight asked. Hiro smiled at them like he knows what to do.

Over the next few weeks, the mane six helped Hiro make his invention for the science fair. Tadashi and his friends helped too.

...

Once the invention is done, they finished it just in time on the day of the science fair.

When they got there, it was filled with other cool inventions who are attending. The mane six, Tadashi, and Hiro are dragging the invention to the stage so he can present. "Ok, Hiro. This is your big moment. You nervous?" Tadashi asked. "Well, just a little bit. I mean, do I have to be on stage?" said Hiro. "Well, you have to present to the judges your invention. So, yes." said Rarity. "Don't worry, Hiro. We'll be right here for you in the crowd." said Twilight. "Well root for ya." said Rainbow Dash.

Hiro takes a deep breath and walked on stage with the manager on his head. The mane six, Tadashi, and Aunt Cass watched him. "Hello, everyone. My name is Hiro Hamada and I would like to show you my invention." Hiro said on stage. He turned on the manager and millions and millions of black things came out of the recycled bin. "Microbots. They can do whatever you want them to do with the help of this manager on my head. When you do, they do what you want them to do by thinking about it. Microbots." Hiro explained as the microbots formed into one big microbot and bowed.

Everyone cheered for Hiro as he presents his microbots. "You did it, Hiro. Woo hoo." Fluttershy said quietly. "That's my nephew!" Aunt Cass shouted. "I knew that invention would help." said Applejack. "Wait till Professor Callaghan sees this. He's gonna flip." said Rainbow Dash. "Yep, it's a good thing he's using that big brain of his." said Tadashi. "He couldn't have done it without you, Tadashi." said Twilight. "Let's go congratulate him!" Pinkie shouted.

When Hiro comes down form the stage, his friends went over him and gave him many hugs. "I knew you could do it. You are the best inventor I have ever seen!" Rainbow Dash shouted. "I can tell you're attending the university." said Applejack. "Hiro, we are so proud of you!" said Twilight as she hugs him. "Thanks, guys. Couldn't have done it without you." said Hiro.

While talking, Professor Callaghan walked to Hiro and said, "Well, congratulations. You have been accepted at the San Fransokyo Institute of Technologies." "I did? This is amazing!" Hiro shouted. "Way to go, Hiro. You made it." said Applejack. "Don't worry, sir. Hiro will be the best student you've ever had." Rainbow Dash promised.

"And his invention was stupendous." said a man behind Professor Callaghan. His name is Allister Krei who owns a technology company in the city. "Who are you?" Twilight asked. "I am Allister Krei, head of Krei Tech. And I am very impressed with the microbots. Are they for sale?" Krei introduced. "For sale? Why would you want to buy the microbots?" Applejack asked. "I just loved them and I would like to use them for the inventions I want to make in the future." Krei explained to her. "Don't think about it, Hiro. He's not worth of your time." said Callaghan. "Calm down, Robert. You worry too much." said Krei.

"I'm sorry, Mr. Krei. But, the microbots are not for sale." said Hiro. "Very well, then." Krei said in disappointmeng as he leaves. Callaghan went to Hiro and lays him on the back. "You made the right decision. I've never trusted him in the first place." he said. "Why not?" Hiro asked. "Let's just say we have other goals that are far beyond different." Callaghan explained. "What happened between you two?" Rainbow Dash asked. "That's none of your business, young lady. Now, if you'll excuse me. I have stuff I've gotta do." said Callaghan as he walks away from them.

This makes Pinkie very suspicious about Callaghan's reaction towards Krei. So, she decides to follow him. "Why does Professor Callaghan hate Mr. Krei so much? Something must've happeend between the two, but what?" she asked herself. "Pinkie, what are you doing?" Hiro asked. "I'm just curious about Professor Callaghan and Mr. Krei. They must've hated each other." Pinkie explained. "Are you sure about that?" Hiro asked. "I don't know, I might be thinking about it." said Pinkie. "Well, come on, Pinkie. You a party to start for Hiro." said Twilight. "Oh boy!" Pinkie shouted.

When they were about to leave, Tadashi leads them to a beautiful part of the university so he can talk to the mane six and Hiro. "Wow, I can't believe you did it. By the way, your zipper is unzipped." said Tadashi. Hiro freaked out and fixed himself. The mane six laughed at him for it. "Come on, guys." said Hiro. "You knew we were just teasing, right." said Rainbow Dash. "Yeah, I know." said Hiro.

"You should be proud of yourself, Hiro. You did this all on your own, even though we helped you out a little bit." said Twilight. "Yeah. I wouldn't have done it without you, Tadashi." said Hiro. "I know. I'm always there for you, Hiro. Whether you need help or need someone to comfort you after something bad happened to you." Tadashi promised. "We're here for you too, Hiro." Fluttershy said. Hiro smiled at them.

Suddenly, they hear a fire alarm going off at the university which alerts them all. "What was that?" Pinkie shouted. "I don't know, but doesn't sound good." Rainbow Dash responded. They all went back to the building and saw it on fire. "Oh my Celestia! How did the building catch on fire?!" Applejack shouted. They saw everyone getting out of the building and running for their lives.

A woman coughed and was about to collapse, but Tadashi caught her. "Are you okay?" he asked her. "Yes, but Porfessor Callaghan is still in there." the woman said as she runs away. "Professor Callaghan is in the building? We have to go save him." said Rarity. Tadashi was about to enter the building, but Hiro stopped him by grabbing his arm.

"Tadashi, no!" Hiro shouted. "Don't risk your life for this. We'll go get him." said Twilight. "Callaghan's in there. Someone has to help." said Tadashi as he ran to the building and takes off his hat. Hiro picks up the hat and looks at it in grief. "Come on, girls! We have to save them before." said Rainbow Dash as she was interrupted when the building exploded. The explosion threw the mane six and Hiro to the ground and was knocked unconscious.

When they got up, they saw the whole building destroyed and never saw Tadashi making it out. Tadashi was dead. "Tadashi?" Rainbow Dash asked.

"TADASHI! TADASHI!" Hiro cried.

...

It was the saddest day of Hiro's life. The university held a funeral for Tadashi and Professor Callaghan. Tadashi's death causes everyone in deep depression, including Hiro.

Hiro never smiled since. He didn't eat anything, he never did anything with the mane six, he never wanted to go back to the university, and many things he has done in his life. The mane six tried everything to make Hiro happy, but nothing. He never thought about nothing but Tadashi.

One day, Hiro was on his bed mourning and Twilight tried to cheer him up. "Hiro?" she asked. "What is it, Twilight? I'm sure Pinkie is making me a feel better party." said Hiro. "Well, no. I'm just telling you that you should still attend at the university. They still want you to come." said Twilight as she gives Hiro the envelope. "Thanks, Twilight. I'm not sure it'll make me feel better." said Hiro. "Hiro, my friends and I have tried everything to make you happy. What is it that you want to make you happy?" Twilight asked.

Hiro sighed deeply and replied, "I want Tadashi." "I know, but I can't do that. I'm sorry, Hiro." said Twilight as she rubs his back in comfort. The girls went to his room and saw her comforting the poor boy. "Is anything helping him?" Applejack asked. "He just wants Tadashi back." said Twilight.

Hiro got up and grabs his mini robot and walks towards the mane six, but the part fell off and hits his foot. He yelled in pain which alerts the girls. "Ow!" he cried. "Are you okay, Hiro?" Fluttershy asked.

Suddenly, they hear some beeping noise and something pops out of the box. It was Baymax. He walked from Tadashi's room to Hiro's room and said, "Hello, I am Baymax. Your personal healthcare companion." "Baymax? What are you doing here?" Pinkie asked. "I didn't know you're still active." said Hiro. "I've heard a sound of distress. What seems to be the trouble?" Baymax asked. "I just stubbed my toe a little, I'm fine." Hiro replied. "On a scale of one to ten, how would you rate your pain?" Baymax asked. "Zero. I'm fine. You can shrink now." said Hiro. "I forgot what you say when Baymax is done healing you." said Rainbow Dash.

"Does it hurt when I touch it?" Baymax asked as he tries to touch Hiro's foot. "Don't worry, dear. I've got this." said Rarity. Hiro backs away, but he fell and got stuck. "You have fallen." said Baymax. "Boy, you're stuck pretty good." said Applejack. "You think?" Hiro asked as he tries to get up, but the shelf broke and robot toys are falling on him. "On a scale of one to ten, how would you rate your pain?" Baymax asked. "Zero." Hiro replied in annoyance.

Twilight uses her magic to get Hiro out of there and dusted him. "I will scan you for injuries." said Baymax. "Don't scan me." said Hiro. But, Bamax already scanned him. "Scan complete." he said. "Unbelievable." said Hiro. "Boy, that's one smart robot if you ask me." said Rarity. "I know everything about health insurance." said Baymax.

"Ok, I know that. Can you please shrink?" Hiro asked. "I'll do it." said Pinkie as she jumps on Baymax and tries to squeeze him into the box, but failed due to him being squishy. "Well, that's what you get for having a squishy robot." said Applejack. "Come on, Baymax. Get in there before Hiro explodes." said Pinkie. "I'm not gonna explode, Pinkie." said Hiro.

While Pinkie is trying to get Baymax in the box, she hears a weird noise coming from Hiro's jacket. "Did you hear that?" she asked. "Hear what?" Rainbow Dash asked. "That weird noise. You know, the noise the microbots make." said Pinkie. "Microbots?" Hiro asked as he grabs his jacket and got the item that was in his jacket. It was indeed a microbot. "Huh, I wonder how it got there." he muttered as he puts the microbot in a plastic bin.

Baymax was looking at the microbot and picks it up. "You like it, huh?" Twilight asked. Baymax didn't respond back, instead he was walking away from them and follows the microbot where it wants to go. "Baymax, come back!" Rainbow Dash shouted. Baymax didn't respond. "Oh no. We better go get him. Come on, girls." said Hiro as he and the mane six go after Baymax so he won't get into trouble.

They found out he left the house and into the city, so they went to the city to find him.

...

When Hiro says goodbye to his aunt, he and the mane six go after Baymax as fast as they could.

"Baymax!" Hiro shouted as he went past through the crowd. "Wait for us!" Twilight shouted. The crowd was so big that it was hard for them to get through. Luckily, Rainbow Dash, Fluttershy, and Twilight manage to get out of the crowd and pulls their friends out of there. "Thanks, girls. Couldn't have reached Baymax quicker." said Hiro. "No problem. Now, let's go find Baymax." said Rainbow Dash.

They found Baymax at the entrance of an abondoned workshop and landed to the ground. "Baymax, there you are. We're worried sick." said Pinkie. "I am sensing more movements in that building." said Baymax. "You do? How? This place is abondoned." Twilight asked. "If Baymax is sensing movements in there, we should check it out." said Hiro. "Good idea. Who would want to be there in the first place?" Rainbow Dash asked.

Hiro went to the door to open it, but it was locked. "It's locked." he said. "Allow me." said Twilight as she uses her magic to destroy to door wide open. "Wow. That's so cool, how'd you do that?" Hiro asked. "Magic. Duh." said Twilight. "Now we got the door problem out of the way, let's go in there and see why this microbot is acting crazy." said Rarity.

Once they all went inside, they saw some lights coming from another room and there was figure in there. "Look, someone's in there." said Fluttershy. Twilight and Rainbow Dash went to the door and opened it. But surprisingly, there was no one in the room. "Huh, I thought I saw someone." said Rainbow Dash. "Me too. Let's just keep looking." said Twilight.

While looking around, Hiro hears a machine running. "Did you hear that?" he asked. "It sounds like a machine going on, and it's coming from over there." said Pinkie. They followed the sound of the machines and saw millions and millions of microbots being duplicated because of the machine. The mane six and Hiro gasped at this. "Are those?" Twilight asked. "Microbots. I thought they were destroyed by the fire." Hiro muttered. "If they weren't destroyed by the fire, that means." said Rainbow Dash.

"Hiro." said Baymax as he accidentally scared Hiro. "Ahh! Baymax, you almost gave me a heart attack." Hiro shouted. "My hands are clear." said Baymax as he rubs his hands to give him a shock. "No no, that was just an expression." said Hiro. "Ok, guys. Looks like we have a mystery in our hands." said Applejack.

Suddenly, they hear the microbots move and go towards a dark man in a mask. "Oh my gosh! What is that?!" Pinkie shouted. "It's a man. In a mask. We should get outta here." said Hiro as he runs towards the exit. The man uses the microbots to try and kill the mane six, Hiro, and Baymax. "Run for it, girls!" Fluttershy shouted as she and everyone else ran for their lives. "Come on, Baymax!" Rainbow Dash shouted. "I am not fast." said Baymax. "Yeah, no kidding." said Rainbow Dash as she picks up Baymax and ran to the exit.

Once they get to the exit, the man went to them and was about to attack them. But, Twilight uses her magic as a shield to protect her and her friends from the microbots. Rainbow Dash punches him really hard that he was thrown to the other side of the room. "Keep running!" Hiro shouted.

They kept running until they are safe and sound from the man in the mask.

...

After the incident, they went to the police station to tell an officer about what happened.

"Alright, let me get this straight. A man in the kabuki mask attacked you and the girls with tiny robots." said the officer. "Yes, microbots. He are controlling them with a manager." Hiro explained. "About the microbots, they were stolen by the man." said Twilight.

"Microbots, huh. So, Mr. Kabuki uses esp to attack you and the ladies, not to mention balloon man." said the officer. Baymax was too curious about the tape and decides to put them on his little holes to make sure the air doesn't get out of them. "Ok, that was awkward." said Applejack. "Hey, Baymax. Would you do us a favor and tell the officer about what happened?" Fluttershy asked.

"Yes, officer." said Baymax. But before he can explain, his battery is staring to go down. "Baymax, are you okay?" Hiro asked. "Low battery." said Baymax as he is slowing down more. "Ok, I think we should go home." said Twilight as she picks up Baymax with her magic and rushes to the door.

Once they got outside, Baymax is acting like he was drunk. "I am Baymax." he said. "Yes, we know that. You told us like fifteen times." said Rainbow Dash. "Let's just go home and rest for tomorrow." said Hiro.

...

When they got home, the mane six and Hiro tried to stay quiet and hide Baymax from Aunt Cass.

"Ok, girls. Just keep quiet and don't let Aunt Cass see you and Baymax." Hiro whispered. "You got it." Rainbow Dash whispered. "Wheeeee!" Baymax shouted as he floats around Twilight's bubble. "Shh, Baymax! Be quiet." Twilight whispered. "Shhhh." Baymax responded back.

"Hiro? You home sweetie?" Aunt Cass called. "Uh oh." Applejack muttered. "That's right." said Hiro as he went upstairs to talk to his aunt. When he does that, the mane six ran to Hiro's bedroom with Baymax without being seen.

"Phew, that was a close one." said Pinkie. "Hairy baby. Hairy baby." said Baymax as he pets Fluttershy like a cat. "Baymax, quit doing that to her. Here, sit on your charger and relax for a bit." said Twilight as she puts Baymax on his box so he can charge. Baymax starts to charge and is back to normal.

When Hiro got back with his dinner, he sat on his bed and looked at his microbot. "What's wrong, dear?" Rarity asked. "I just don't know why the microbots didn't get destroyed by the fire." said Hiro. Applejack thought about that for a moment and said, "I keep having this feeling that the masked man that attacked us today stole the microbots and caused the fire which killed Tadashi."

"Tadashi." said Baymax as he looks at Tadashi's room with his hat on his bed. "I know, I miss him." said Hiro. "When will he return?" Baymax asked. "He's dead, Baymax. He's not coming back." said Hiro as he closes the shades on his bedroom and mourns. "I miss him too, Hiro. You know, some people say that someone very close to you will always be there for you." said Rainbow Dash. "Tadashi is here." said Baymax. "Well, he's not here. But, he's here in your heart." said Twilight as she touched Hiro's chest.

"So, Applejack. You're saying that the man who attacked us stole the microbots and killed Tadashi?" Fluttershy asked. "Yep. Since when did I ever tell a lie?" said Applejack. "Never. Not a million years!" said Pinkie. "Perhaps we should catch the man in the mask since he's a criminal and killed Tadashi." said Twilight.

"That's a good idea, Twilight! Let's do it!" Hiro shouted. "Woo! I am so pumped up!" said Rainbow Dash.

...

That night, the mane six, Hiro, and Baymax went back to the abondoned building where they last saw the masked man to capture him and bring him to justice.

"Alright, we're here. Just stay quiet, we don't want the man in the mask to see us." Rainbow Dash. "Is there anything I can help?" Baymax asked. "Just in case anyone of us gets hurt, you'll help us feel better." said Hiro. "It's kinda scary at night." said Fluttershy. "Don't worry. Well get outta here safe and sound." said Applejack.

But before they can move any further, a van appeared out of nowhere and saw Tadashi's friends inside. "Hiro, what are you doing here?" Wasabi asked. "What are you guys doing here?" Hiro asked. "I have contacted your friends to help." said Baymax. "Baymax, come on. We can handle this since there's six of us and four of them." said Rainbow Dash.

But suddenly, the man in the mask saw them and attacked them with the microbots. The mane six and everyone else screamed in horror. "Everyone, run!" Twilight shouted as evryone got in the car and Wasabi drove really fast to get away from him.

"Hiro, explain now!" Gogo shouted. "This man stole my microbots and caused the fire back at the university which killed Tadashi." Hiro explained. "It's true, Gogo. We want to capture him because of that." said Rainbow Dash. "Hurry! He's coming faster!" Pinkie shouted. "I'll take care of him." said Twilight as she got out of the car and zaps the man and his microbots, but he got up and chases after them.

The man got closer and closer to them and Hiro looks at him deep in the eyes which shocks him. Rainbow Dash looked at him too and gasped. "We're under attack from a super villain people! How cool is that? I know it's scary, but how cool!" Fred shouted. "He knows we're onto him! What do we do?" Fluttershy asked in fear.

Suddenly, the man caught the car with his microbots and trapped them. Luckily, Gogo presses the wheel really hard that they got out safe and sound. Everyone screamed because of the speed. They went too fast because they want to get away from the man. So fast that the car went underwater. The car begins to sink really deep and into the water ground.

The mane six tried to help Hiro and the others, but Baymax took off his entire armor and got everyone to the surface. They all took deep breathes and relaxed. "Oh, Baymax. You saved us." said Pinkie as she kisses the robot on the cheek. "I didn't know we were going that fast." said Applejack. "Is everyone okay?" Twilight asked. "I think so. Didn't know we ended up here." said Hiro. "That man. He just stared at me like he wants to see my fear." said Rainbow Dash. "It's alright now. The man is gone. Now what?" said Wasabi. "We have to hide. We can't let the man catch us again." said Rarity.

That gave Fred an idea. "I know a place." he said.

...

Fred leads everyone to where he lives, which turned out to be a huge mansion.

"Here it is, my home sweet home." said Fred. "A mansion? You live in a mansion? You've got to be kidding." said Rarity. "Nope. Not joking. This is real. Come on in." said Fred as the door was opened by the butler where he greets everyone.

Once they got inside, they were all amazed by the looks of this place. "Fred, you didn't tell us you live in a mansion. Your parents must be very much." said Twilight. "They are, but they're on vacation. So, it's my place for now." Fred explained. "At least the man in the mask won't get us now that we're here." Rainbow Dash said. "She's right. Who's knows what could happen." said Fluttershy.

When they enter Fred's room, they saw monster figures and thousands of comic books. "Cool room you got there." said Pinkie before she sneezes because of the cold. "Uh oh. You are catching a cold. I better warm you up to be nice and healthy." said Baymax as he drops on Pinkie and warms up to keep her warm. "Hey, what gives? Wow, it feels good. I really like this." said Pinkie. Applejack went to Baymax to feel his warmth. "Wow, it's as warm as my pies." she said. The rest were on Baymax and stayed nice and warm.

After that, Hiro is still thinking about how to catch the man in the mask. "Hiro, what are thinking about?" Rainbow Dash asked. "About the man in the mask. We still have to go after him, he could kill someone else." said Hiro. "I believe its Allister Krei." said Pinkie. "Uh, why do you think Krei is the man in the mask?" Honey Lemon asked. "Well, he wants the microbots in the first place. So, he might've started the fire to steal them and killed Tadashi." Pinkie explained. "Hmm, good point. But, I'm not sure it's him." said Applejack. "It could be someone we know or don't know." said Rarity. "So, how do we catch him?" Rainbow Dash asked.

Hiro looked at a picture of superheroes on the wall and knows what to do. "We are going to be superheroes." he said. "We are? That's so cool! Let's get started." said Twilight.

...

So, Hiro made superhero outfits for the mane six and his friends. He also made one for Baymax. To make him good at martial arts, Hiro created a chip for him to help him do cool moves.

Once he's completed him, Hiro showed him to everyone. "Alright guys, allow me to introduce Baymax 2.0." he said. "Oh, he looks so awesome!" Rainbow Dash squealed. "He's glorious." said Fred. "Hello." said Baymax as he chases after a butterfly. "Whoa whoa, buddy. Show them the fist." said Hiro. Baymax uses his rocket fist to destroy a staute that looks like Hans. "Awesome!" Applejack shouted.

"He can fly too. Let's give it a try out." said Hiro as he got on Baymax's back. "Can I fly with you?" Rainbow Dash asked. "Sure. Just in case our flight doesn't do well." said Hiro. "Ready for liftoff?" Twilight asked. "Oh, yeah." said Hiro. Baymax readies his rockets and off into the sky. Rainbow Dash followed them.

They flew everywhere in the city, including the San Fransokyo bridge. "This is so cool! How'd you like your flying technics?" Rainbow Dash asked. "It's amazing. Wanna see me fly faster?" Hiro asked. "Sure. Bet it won't beat my own speed." said Rainbow Dash. Hiro and Baymax went really fast, but the rockets stopped suddenly. "Too much thrust! TOO. MUCH. THRUST." Hiro shouted as he and Baymax fall to the water, but flies again. "Whew, that was close." said Rainbow Dash as she flies with them.

They are now relaxing on a hot air balloon looking at the city. "Will you look at this place? It's so beautiful." said Rainbow Dash. "It sure is. Do you think it is, Baymax?" Hiro asked. "Yes, it is." Baymax replied. While looking around, Rainbow Dash saw an unfamiliar island not far from the city. "Hey, Hiro. Have you seen that island over there before?" she asked. Hiro and Baymax looked at the island too. "No, why? Do you think the man in the mask is there?" Hiro asked. "We should check it out, just to make sure." said Rainbow Dash. "Let's get the team." said Hiro.

So, Hiro and Rainbow Dash took the mane six and friends to the island.

...

When they got there, it looked like an abondoned factory created by Allister Krei since the symbols are from his company.

Pinkie was whistling while Fred is singing his theme song. "Will you guys be quiet? We're catching a villain here." Applejack whispered. "Sorry." Pinkie giggled. "Are you sure this is where the man in the mask is?" Honey Lemon asked. "I hope so. We'll find clues once we get inside." said Hiro. "I don't see him coming." said Fluttershy. "That's a good thing." said Rarity.

Once they got inside thanks to Wasabi's lasers, they looked around to find some clues. In a little lab, Applejack found a videotape of a project Krei did a while back. "Hey guys, come over here! You might wanna see this." she shouted. "What is it?" Twilight asked. "It looks like large donut." said Pinkie. "That's not a donut, Pinkie. It's a portal." said Hiro. The video shows Krei presenting his portal to the military and shows them how it works. Then, a young female test pilot is sent to test out the portal to make sure it's safe. Suddenly, the portal malfunctioned and was destroyed, leaving the pilot vanished forever. "Oh my goodness. What happened to her?" Fluttershy asked. "This better be a clue, I just know it." said Twilight.

Suddenly, the man in the mask appeared and attacked everyone. "Get ready to remove his mask everyone!" Hiro shouted. "I'm on it!" Rainbow Dash shouted as she flew towards the man, but he uses the microbots to block her. Fred did the same thing, but failed too. "Alright, you. You messed with the wrong team." said Applejack as she uses her rope to catch him, but caught his microbots and gets tied up herself. Pinkie and Gogo uses their speed to catch him, but Honey Lemon uses ice to catch him and they all slipped.

Now Hiro has the chance to catch him while his friends failed to do so. Once he was on Baymax, he tackled the man in the mask and fell to the floor with him. His mask was off at last. Rainbow Dash and Baymax went to him to see he's alright. "Alright, Krei. It's over." said Hiro. The man in the mask wants Krei at all. He stood up and revealed his face to everyone.

It was Professor Callaghan.

The mane six and everyone gasped in horror at this. "Professor Callaghan?" Hiro asked in surprise. "That's right." said Callaghan. "But how? You died in the fire." Rainbow Dash asked. "I caused the fire back at the university. I want the microbots myself and used them to protect myself from the fire." Callaghan explained. "Tadashi. He tried to save you." said Hiro. "That was his mistake!" Callaghan shouted coldly. "No, it wasn't. He tried to save you from the fire, but you wouldn't let him. You killed him." Rainbow Dash pleaded in tears. "I didn't kill him. He killed himself. Plus, I never cared for that boy anyway." said Callaghan.

Those words made everyone in shock and horror, especially Hiro. "Baymax. Destroy." he ordered. "My duty is to not harm people." said Baymax. "No. I will do it. He deserves to die like a villain deserves." said Rainbow Dash as she prepares to attack Callaghan. She punches him in the face and throws him to the floor. "Rainbow Dash, stop!" Honey Lemon pleaded. "No! He killed Tadashi!" Rainbow Dash yelled as she beats up Callaghan. the mane six went to her and Twilight uses her magic to hold her down, making Callaghan escape with his microbots.

"What are you doing? Let go of me!" Rainbow Dash shouted. "No, listen to me! What you did wasn't part of the plan." shouted Wasabi. "What do you mean? Hiro is the one that wants him to get killed!" Rainbow Dash shouted. "Way to go, guys! Callaghan just got away thanks to you all. We are supposed to catch him, and we didn't." Hiro shouted. "I'm sorry, but killing is wrong." said Applejack. "We never killed anyone. Ever." said Fluttershy.

"If you guys can't help me, I'll go myself!" Hiro shouted as he flies away with Baymax. "Wait, Hiro!" Rainbow Dash shouted as she follows him.

...

She follows him back at home as he tried to turn Baymax into a menacing machine, but Baymax refuses to remove his chip.

"Hiro?" Rainbow Dash asked. "What do you want, Rainbow Dash? Can't you see I'm busy?" Hiro asked angrily. "I'm sorry for what happened. Can I talk to you?" said Rainbow Dash. "What would Tadashi think about what you're doing?" Baymax asked. "I don't know, I just." said Hiro. "Tadashi doesn't wnat you to be like this, Hiro." said Rainbow Dash.

"TADASHI'S GONE! Tadashi's...gone." Hiro cried as he sobs in Baymax's chest. "Tadashi is here." said Baymax. "No, he's not Baymax. He died, remember." said Rainbow Dash. "Tadashi is here." said Baymax as he shows Hiro and Rainbow Dash clips of Tadashi testing him eighty four times. While watching, Hiro sheds tears of joy and sadness. "You're going to help so many people. So many." said Tadashi in the video. Rainbow Dash smiled.

Hiro sniffed as the video was over and said, "Thank you, Baymax. I'm so sorry." "Oh, Hiro." said Rainbow Dash as she hugs Hiro in tears. "I know, Rainbow Dash. I know. I guess Tadashi doesn't want this." said Hiro as he hugs her back. "He doesn't." said Rainbow Dash.

While hugging, they saw the mane six and the others in front of them. "Look, guys. I'm sorry what happened back there." said Hiro. "Oh, Hiro. I know how you feel." said Twilight as she hugs him. "We all do." said Fluttershy. "Professor Callaghan was a good guy, what happened?" Pinkie asked. "I know why, it's because of what happened in the video we saw earlier." said Applejack.

"What do you mean, Applejack?" Hiro asked. "I saw Professor Callaghan watching the pilot going throught the portal. But when she vanished, he shouted that it's his daughter. Which means that pilot was Callaghan's little girl, he also blames Krei for it." Applejack explained. Everyone gasped at her explanation. "So that's why he caused the fire to steal the microbots and killed Tadashi. To avenge his daughter. Come on, everyone. We have to stop Callaghan." said Twilight.

Everyone agreed with her on that. So, they're off to Krei's company to stop Callaghan from killing him.

...

When they arrived, Callaghan already attacked the company and has Krei hostage.

"Progessor Callaghan! Stop! This doesn't solve anything!" Hiro shouted. Callaghan turned around and said, "Then, my daughter would've died for nothing!" Callaghan yelled. "Please, sir. You have to stop this. Violence will make you cold and evil. You have to let it go." Twilight pleaded. "I want my daughter back!" Callaghan yelled as he pushes everyone to the ground and ties up Krei in metal. "Help!" Krei shouted.

Once they got up and dusted themselves, they saw Callaghan rebuild the portal from the island with the help of the microbots. The portal was turned on and it starts sucking on everything that belongs to Krei. "Say goodbye to everything you love. You took away from my everything, now I'm returning you a favor." said Callaghan as he watches everything going into the portal.

"The portal! Everything's disappearing!" Rarity shouted. "We have to shut it off!" Rainbow Dash shouted. "Let's do it!" Hiro shouted as he and his friends prepare to attack. The all destroyed the microbots. Twilight zaps them with her magic, Applejack kicks them as many times as they can, Rainbow Dash destroys them with her moves, Pinkie uses her party cannon to destroy them, Rarity uses her martial arts skills, Fluttershy defeats them with her fear, Wasabi uses his lasers to destroy them, Gogo uses her speed to destroy them, Honey Lemon blows them up, Fred breathes fire at them, Hiro and Baymax fly off to stop Callaghan.

"It's over, Callaghan. Give it now!" said Hiro. "No, I will never give up until my daughter is avenged once I destroy everything Krei created with his power." said Callaghan as he summons the microbots, but didn't appear since the team destroyed them all. But, Rainbow Dash kicks the last microbots Callaghan is standing on and he falls over. She takes his mask off and smashed it to bits. Callaghan tries to run away, but Applejack came over and ties him up with her rope. "You're not going anywhere, partner. You are going to jail for the rest of your life." she said.

Twilight uses her magic to free Krei from his hostage and everyone is running from the portal, except for Baymax. "Baymax, what are you doing? We need get outta here!" Rainbow Dash shouted. "I am sensing some life in the portal. The gender is female and is in hyper sleep." Baymax explained. "Abigail?" Callaghan whispered. "She's still alive. We can get her out of there before the portal gets destroyed." said Hiro. "Let's do it!" Rainbow Dash shouted.

So Hiro, Baymax, and Rainbow Dash went to the portal and save Abigail. When they got inside, they zoomed throught the debris to get to the spaceship as fast as they can. "There she is!" Rainbow Dash shouted. They got to the spaceship and saw Abigail inside asleep. "She's okay, but we need to get her back to earth." said Hiro. "Got it. Let's give this thing a boost, Baymax." said Rainbow Dash as she and Baymax push the ship with their speed to get back to earth.

Suddenly, a huge debris crashes into them and Baymax's armor completely destroyed and Rainbow Dash had her wings hurt. "Ow, my wings. Hiro!" Rainbow Dash cried. "Hang on, Rainbow Dash. I got you." said Hiro as he grabs her and holds onto her. Baymax tried to use his rockets, but they broke because of the debris. "My rockets are no use on getting out. I have to get you two out the other way. You have to say I am satisfied with my care." said Baymax.

Rainbow Dash and Hiro were heartbroken on what he said to them. "Baymax, no. Don't so this!" Rainbow Dash shouted. "You have to say I am satisfied with my care." said Baymax. "I'm not losing you too." said Hiro. "I will always be here for you." said Baymax. Hiro starts to shed tears and hugs the robot. Baymax hugs him back. Rainbow Dash hugged them too. Baymax uses his rocket fist to boost it so Rainbow Dash and Hiro can get back to earth.

They watch him disappear from them forever.

...

When the spaceship got back safe and sound with Rainbow Dash and Hiro, they were both in tears. The portal exploded immediately. Rainbow Dash was crying in Hiro's arms as everyone went to them to see they're okay.

"What happened? Where's Baymax?" Twilight asked. "Baymax is gone. He sacrificed himself to save me and Rainbow Dash. At least Abigail is safe." Hiro explained. "Rainbow Dash, you poor dear. Are you alright?" Rarity asked. "No, both physically and emotionally." said Rainbow Dash. "Here, let me heal you." said Rarity as she uses her magic to heal Rainbow Dash.

A few moments later, they all watched Abigail being taken to the hospital and Callaghan going to jail for the rest of his life for murdering Tadashi and destroying the Krei company.

...

A few days later, Hiro went through the death of Tadashi thanks to the mane six and his friends. He finally accepted to go to college and have a happier life without Tadashi.

"Come on, Hiro. Let's get ready for your day." said Twilight. "I'm coming." said Hiro. "My Hiro, that jacket looks good on you." said Rarity. "Thanks, it's for the college." said Hiro. "We might have a party when we get there." said Pinkie. "Everyone will love your inventions in the future." said Applejack.

When they get to Tadashi's old office, they unpack everything and set things where they want to put them. Hiro pulls out Baymax's rocket fist as a reminder of him. "Baymax. Oh, I miss that robot." said Rainbow Dash. "Me too." said Hiro. While looking at the rocket fist, he saw someone in the hand. He opened it and saw Baymax's healthcare chip inside. "Girls. I found this in the rocket fist. You know what that means?" he said. The mane six nodded yes at the question.

As a result, Hiro and the mane six rebuild Baymax and he was good as new. "Hello. I am Baymax. Your personal healthcare companion. Hello, Hiro. Hello, girls." said Baymax. Hiro was so happy that he hugged the robot. Baymax hugged him back.

"Well, girls. I think it's time for us to leave." said Twilight. "You're leaving already? Ok then, I'm going to miss you. Thanks for helping me get through what happened to Tadashi. At least San Fransokyo is safe now." said Hiro. "It sure will. Don't worry, you'll be fine. You have Baymax to take care of you." said Rainbow Dash.

"Bye, Hiro. Bye, Baymax." said the girls as they disappear. "Bye, girls." said Hiro and Baymax.

...

Once the Book of Disney dropped them off, the mane six landed safe and sound.

"Wow. I never cried that much before." said Rainbow Dash. "It's alright, Rainbow Dash. You just care for them, that's all." said Twilight.

...

That night, Rainbow Dash went to the Disney Journal to write her lesson. But before she can, the spirit of Tadashi appeared in front of her.

"Hello, Rainbow Dash." he said. "Tadashi? Is that you?" Rainbow Dash asked. "Yes, it's me. I've come to visit you to say thank you." said Tadashi. "For what?" Rainbow Dash asked. "For helping my brother. He needs me more than anything, now I died and he has no one. But, you guys came along and made him feel better. He has Baymax and his aunt, he'll be okay. You know what? You're the best thing that ever happened to me." Tadashi explained. "Really?" Rainbow Dash asked. "Really. Thank you, Rainbow Dash. Thank you." said Tadashi as he leaned down and kissed her forehead, then disappeared.

Once he left, Rainbow Dash went back to the journal to write her lesson. She wrote,

"What I learned today is about justice. When you fight a villain, you can't kill him the wrong way. Just let him face his own punishment. Losing a loved one is really hard, but you have friends and family to be always there for you."