After the battle in the city, everyone returned to Hiro's garage to rest. The next day, everyone stood in the garage silently with sad and serious looks. Laxus did not join them as he went on a walk.

Hiro: Laxus has been acting strange. He didn't return last night.

Sora: I honestly don't know what's wrong with him.

Juvia: I think it had something to do with that fake Riku that showed up.

Hiro: What do you mean.

Gajeel: I guess that fake's personality reminded him of himself.

Erza: In the past, Laxus was arrogant, overbearing, selfish, and prone to make fun of his own comrades. He believed himself to be the strongest member of Fairy Tail, and looked down on those he considered weak, heavily reprimanding their weakness and even resolving to hurt them whenever they stepped in his path.

Lucy: He was incredibly strong. But everyone hated his personality.

Hiro: So what changed him?

Natsu: He tried to take over the guild by making everyone fight each other and he was kicked out because of it.

Happy: And I guess he changed while he was gone.

Carla: He was then welcome back into the guild by someone who was in the guild.

Panther Lily: I guess seeing that fake Riku must've triggered bad memories of him

Hiro: I see...

Fred: C'mon, guys. What's with all the long faces? Did you forget that we WON?!

Go Go: Fred. Not now.", said an annoyed Go Go.

Modeus: It's true that we won. But now we have another problem to deal with.

Hiro: His name is Riku? And you know him?

Sora: Yeah... Well, I know a 'him.'

Donald: That one is a fake

Goofy: The fake one's with Organization XIII, our arch-nemenies.

Wasabi: Okay, but how'd he get Hiro's chip?

Honey Lemon: And what did he mean about an experiment?

Go Go: And what do they want?

Sora: he said they're trying to recreate a heart from data, (crosses his arms) but I don't know what they really want. None of us do. (uncrosses) These guys, they show up, and instead of fighting fair and square, they go for the heart and say things to try and get under your skin. They're cowards. (looks down) And now, they're doing it to you, too. It's our fault.

Wendy: We're really sorry.

Hiro: no. This could be good. That chip might finally be able to give me some answers.

Sora: you said you made it, right?

Hiro: yeah. This Baymax—he's actually the second model. (turns to Baymax) Uh, no offense.

Baymax: I am a robot. I cannot be offended.

Trish: You said this is a second model.

Lucy: Is there another Baymax?

Drake: Wait, so if he's the second, what happened to the first one?

Hiro: Tadashi made the first model. It's a long story. But the first Baymax and the chip I made...vanished into another dimension along with the microbots. The chip's back... So the first Baymax might be back too.

Honey Lemon: (worried) Hiro...

Baymax: Those who suffer a loss require support from friends and loved ones.

Suddenly, there was a large bang and then room started to shake, causing everyone to lose balance.

Fred: What was that?

Wasabi: I don't know.

Hiro quickly went over to his computer and quickly typed on it. An image quickly popped up on the screen showing the head title, "Mysterious Monsters Renew Attacks", with the image of the Darkubes attacking the city.

Sora and Hiro: Guys, c'mon!

Honey Lemon: But what about Laxus?

Drake: I'm sure he'll be there.

*Downtown* 

Before the attack, it was still night out in San Fransokyo. Laxus was sitting on top of a building watching the ground with angry and serious look. He then remembered getting into an argument with Erza after the Phantom Lord war.

(flashback) 

Erza: Why don't you tell the others how you feel?!

Laxus: I have no problem telling them what I think of them. This guild's full of nothing but losers and weaklings. (turns to a young Jet and Droy) Especially the two of you morons. You were Phantom's personal punching bags. You know I'm glad I've never bothered to learn your names. (then faces Lucy) Which brings me to the worst of them all, the rich little princess wanna be wizard. This was your fault.

Mirajane: Laxus! Would you shut up? The Master said no one in the guild was to be held accountable for what happened. Not even you, despite the fact I begged you to come help and you turned your back on us!

Laxus: Stop your winning! That fight had nothing to do with me. But if I had been there, you wouldn't be drowning your sorrows in this pile of rubble right now.

This made Erza furious.

Erza: Why you-

Natsu: I've heard enough outta you!

Natsu then charged towards Laxus. But before he could strike him, Laxus teleported behind Natsu, making him lose balance. 

Natsu: Come on, Laxus! Fight me like a man, you gutless coward!

Laxus: (laughs) How do you expect to fight me if you can't even touch me, dimwit. I can't wait to inherit this place and kick all of you weaklings to the curb. Your days in Fairy Tail are numbered, kids! Things are gonna be a whole lot different around here, so I guess you losers will have to find a new place to hang out.

(flashback ended) 

Laxus's mind: Hearing that guy talk, made me remember all the bad things I did in Fairy Tail. That bastard is messing with me without even trying!

He then noticed two figures walking on the highway. Laxus then went to get a closer look. When he got close, he saw that the two figures were Maleficent and Pete.

Laxus's mind: Is that the witch Sora was talking about? Maleficent, was it? Are they here looking for that Black Box?

Laxus then noticed a dark corridor appeared behind them and Dark Riku appeared from it.

Laxus's mind: Him again!

Maleficent noticed Riku and turned around, along with Pete.

Dark Riku: Why are you snooping around?

Maleficent: That would be none of your concern.

Dark Riku: Overstep, and darkness will consume you again.

Maleficent: (intrigued) What an interesting thing to say. I shall do anything I please. As should you.

Dark Riku: (smirks) Oh, I intend to. (teleports away)

Pete: (confused) Who's he? Friend of yours?

Maleficent: Yes. Though I could not tell you from "when."

Laxus's mind: What the hell are they talking about? Either way, I should go find a place to stay. If he's watching the city, then I don't want to get caught.

*Daytime*

Back in the present, the group arrived at the top of the building were the Drakubes are. Everyone was now feeling confident.

Go Go: Hope it's learned some new tricks.

Wasabi: Yeah, now it's gotta face all of us.

Honey Lemon: That's right.

Fred: Freddie want to destroy!

???: Sorry I'm late.

They all turned and saw Laxus standing there.

Hiro: Where were you? You were gone all night.

Laxus: There were some things I needed to think about. But right now, we have to deal with this first.

Baymax: Our probability of success is-

Hiro: You don't have to crunch the numbers, Baymax. It's not the sum of our parts. It's the sum of our hearts.

Sora: Yeah.

???: Which adds up to what?

Everyone looked up and saw Dark Riku standing on top of the floating fans.

Dark Riku: (smirk) Show me.

He then summon his Soul Eater and jumped towards the Darkubes. He headed towards the core and slashed it with his sword. He then landed in front of the Drakubes. 

The core of the Darkubes disappeared and all of the cubes stopped glowing and immediately fell to the ground. He then grabbed Hiro's chip from his pocket.

Dark Riku: Almost there.

Sora: (shock) What?!

Wendy: Why would he destroy the Darkubes?

Dark Riku: (kicks three cubes) This pile of junk collect the data we needed. The terror of being attacked without warning. The despair of having no place to run. The longing for vengeance.

Sora: A heart's more than that!

Lady: You idiots still haven't learn, have you?

Wasabi: It's working together.

Happy, Donald, and Goofy: Smiling at something funny.

Hiro: Trusting friends.

Drake: And most of all; hope.

Sora: In every heart, there's hope.

Dark Riku: You're right.

Sora: Huh? 

Dark Riku: That's why I made sure our creation fought you. Now the data contains a complete heart.

Sora: A heart made from conflict?! That can't be real!

Dark Riku: What was it you said? I only have to see it for it to become real? So, let's see it.

Laxus: (stepped forward) You better stop what you're doing. Cause you're really pissing me off.

Dark Riku: (laughs) Oh, right. I forgot you had the Fairy Tail wizards with you. (to the wizards) They say you're powerful, but there's no way you can defeat us since you don't have the power of the Keyblade.

Natsu: Don't you dare make fun of Fairy Tail again!

Erza: Hold on, Natsu.

Laxus: If you really think that, then you guys are even stupider than I thought.

Dark Riku quickly gave an angry look on his face. But then he took a deep breath and smiled.

Dark Riku: I would love to chat with you some more, but unfortunately I have to finish this.

Dark Riku then summoned a giant dark vortex into the sky, causing all of the cubes to float towards the vortex.

Dark Riku: First, we need a vessel.

All of the cubes entered into the vortex. Seconds later, the cubes came out, in the form of a giant red sphere, glowing red and crackling with red electricity. Everyone looked cautious.

Go Go: What's going on?

Honey Lemon: Another Darkube form?

Fred: Doesn't look as bad as the last one.

Goofy: It could be a trick.

Wasabi: Usually is.

Modeus: Trick or not, we need to get ready.

Donald: We can stop it!

Suddenly, the sphere started to become smaller and Hiro noticed something that came out from the Darkubes. It was a white arm. Hiro then became shocked.

Sora: (summons his Keyblade) Yeah.

Hiro: Wait! That's...Baymax.

Sora: What?!

Drake: If that's the first one, then that means...

The cubes then merged with each other and Baymax landed down. This one, however, was in a dark purple armor with horns on the shoulders and head, crow wings on its back, and a large right handed claw made of microbots. This was Anti-Baymax.

Everyone was surprised at the form, but Hiro was worried.

Hiro: Baymax...

Dark Riku: (smile) Don't bother. This puppet has lost his heart. He won't wake up.

Hiro: He's not a puppet! Baymax, he's like my family! Please! Give me back my friend!

Dark Riku: (chuckles) Yes... I did promise I'd put this back where I found it.

The chip glows purple and floats into the robot. The chip older opens and the chip is inserted inside. It closes, and the robot activates with a glowing red visor, ready for combat.

Anti-Baymax: (darker voice) Hello. I am Baymax, your personal destroyer.

Baymax: Oh no.

Dark Riku: But there's one piece missing. Sora, you're the who's going to complete this heart.

Sora: Yeah, right.

Dark Riku: You can't have a heart without sadness...without loss. You see, you're going to destroy Hiro's friend right in front of him. 

Anti-Baymax immediately flew towards a stunned Hiro.

Everyone: Hiro!

Big Hero Six charged towards it, but Anti-Baymax swatted them away with his giatn hand. The group then held back the giant hand until Baymax came in and pushed the robot off of the building with one punch. 

Anti-Baymax then came back, as he was flying. But before he could do anything, he was held back by Donald, Goofy, Lucy, Modeus, Kat, Wendy, and Carla.

Big Hero Six: Hiro...

Natsu: Bastard!

Dark Riku: This should be rather entertaining. These weakling's hearts will be crushed as they have to fight a doll.

Laxus then came up to him and grabbed Dark Riku's shoulder.

Laxus: You had your say, now get the hell outta here!

He then lifted Dark Riku up and threw him into the air, making him scream. He then crashed into several buildings. Everyone watched with shock while an angry Laxus breathed heavily.

Goofy: I've never seen Laxus this mad before.

Trish: Let's hope not to piss him off again.

Hiro: Amazing...

Drake: This isn't good. Combine with the combat programming and the Darkubes, that things a walking war machine.

Sora: Hiro, tell us. What should we do?

Hiro: Baymax means everything to me. But that chip isn't who he is. I already made this mistake once before. Tadashi wouldn't want there to be a Baymax that hurts people. He has to be stopped.

Sora: Okay. Help Go Go and the others. You can leave this guy to us.

Hiro: (smiles) Thank you.

Anti-Baymax immediately flew into the air and took off.

Ur: He's getting away! 

Sora: Oh, no!

Hiro: Sora, take Baymax!

Sora: Okay! Baymax!

Baymax: I am ready, Sora.

Sora jumped onto Baymax's back and the two of them flew off.

Laxus: Lily, I need you!

Panther Lily immediately grabbed Laxus and the two of them flew after Sora.

Gajeel: Hey, give me my cat back!

Hiro: We need to evacuate the city!

Everyone: Right!

Laxus quickly caught up to Sora and Baymax, who were dodging laser attacks from Anti-Baymax.

Sora: Laxus!

Laxus: (smile) Looks like you need some help.

Sora: Yeah, you're right.

The four of them continued to dodge the lasers Anti-Baymax was throwing at them.

Panther Lily: We won't be able to defeat him if we keep this up.

Laxus: I got this! Lightning Dragon Heavenward Halberd!

Laxus sent the lightning spear straight towards Anti-Baymax. Once it hit him, he short circuit a little and stopped flying away. Sora then transformed his Keyblade and fired at Dark Baymax.

Sora: Charge, Baymax!

Baymax flew towards Anti-Baymax and punched him squarely in the face. Sora then jumped off of Baymax and hit Anti-Baymax with his Keyblade. 

Baymax then caught Sora. But before they could fly away, Anti-Baymax grabbed both of Baymax's feet and started pulling him down. 

Baymax then punched him with his gauntlet to let go and Laxus punched Anti-Baymax with his lightning fist, making Anti-Baymax crash into the ground. 

The four of them ran after the beaten up Dark Baymax when they noticed the others running after them.

Sora: Guys... Hiro...

Everyone then stopped when they came close to him.

Wasabi: So, did we stop him?

Hiro: Safety mode kicks in if he's under too much stress, so he's probably just in stasis. (crouches down to him) We'll have to destroy the chip if we want to be certain.

Honey Lemon: But...are you sure?

Fred: Yeah, dude...you don't need to go that far.

Go Go: Maybe we can find another way.

Hiro: (lightly shakes his head no and pulls the chip out) It's the right thing to do.

With the chip gone, the armor disintegrates and they see the original Baymax, deactivate but mostly intact. 

Hiro gives a sad smile and places his hand on his friend's chest.

Hiro: Tadashi would've done the same thing.

Sora: But, Hiro...isn't that Baymax's heart?

Laxus: That's not his heart. That's just an object created by assholes to make people suffer. (looks at Hiro) You know who the true Baymax is. If they can create a heart from data, I don't see why you can. So remake the heart of your true friend.

Hiro: You're right. (puts his hand against his chest) Baymax is here.

Hiro then put the chip on the ground and stepped on it, breaking it.

After the battle, everyone returned to Hiro's garage so Hiro can fix Baymax. After a while, Hiro fixed the damages on Baymax and looked like his original self.

Happy: Is he fixed?

Hiro: Let's find out. Ow?

Baymax 1: (opens his eyes) Hello, I am Baymax, your personal healthcare companion.

Everyone shouted with joy while Hiro ran up to Baymax and hugged him. The other Baymax went up to Hiro and hugged both of them.

Happy: Two Baymaxes!

Sora: This is great, Hiro!

Hiro (breaks the hug) Yeah, thanks.

Sora: So, uh, do you think I could take one of them with me?

Hiro: Uh, that's a no.

Sora: What? C'mon.

Hiro: No. Who's gonna repair him?

Sora: One. Just one of them! C'mon. Pleeease?

Hiro: He's my personal healthcare companion.

Laxus: Enough Sora.

Everyone then laughed.

Chapter 84 ended.