Once outside and onto the grassy quad area, the robot's invisibility wore off and its appearance was finally revealed. A dark metallic grey, it was somewhat crab-like, used four tentacled arms to move, and had red eye-like sensors on the front of its body. Hiro climbed onto Baymax's back and magnetically attached his gloves and boots to the connection points swiftly.

"Get him, Baymax!" he commanded his friend. Baymax's back thrusters fired up and he shot off after the now surprisingly quick enemy. Go Go sped up alongside Baymax and Hiro in pursuit as well. A few people around that evening looked on in surprise at the chase.

Suddenly, two tentacle arms shot back from the robot, which forced Go Go to dodge. Baymax blocked the attack directed his way with his massive armored forearm. Hiro, Baymax, and Go Go were then surprised by the sound of a metallic 'clank', then the sight of a steel bungee cable attached to the mysterious robot.

"Come back here, you!" Clover shouted as she retracted the cable to reel herself in closer to her target. The robot simply increased its speed, which caused her to flail behind wildly. "Whoa!" she yelled in panic while she tried to fight for control.

She carefully retracted the cable a bit to draw nearer to the robot until she could put a gloved hand on the back of it. With her other hand, she slapped a small device onto its steel surface. The next moment, a tentacled arm shot out towards her. She gasped and released the magnetically attached end of her bungee, in an attempt to avoid the powerful strike.

A giant metal fist flew just above her from behind and smashed through the metal tentacle at the last moment, which ripped the telescopic arm section from its body. It fell to the grass, and sparked with electricity. When Honey caught up, she swiftly doused a small flame on the grass with a blue chemical freeze ball that burst into ice.

Clover had flown up higher than expected, spun about, and wasn't able to activate her jet pack. Alex and Sam, however, had flown in to catch her via their own jet packs.

"Super Jump!" a voice rang out enthusiastically.

Sam and Alex were startled by a blue and gold monster that bounded in from above them to catch Clover.

"Yaaa!" Clover cried in fright at the sight of three bulging eyes and the gaping mouth of 'Fredzilla'.

"Clover!" shouted Sam, who swung a lavender bottle of perfume out of her backpack in a flash. When the creature landed, she sprayed his legs with a mist that condensed into ice, which held him in place. Clover jumped from his arms to the ground with an exhale.

"Huh?" Fred wondered in surprise at the sudden ice that immobilized him, then quickly used his claws to chip away at the ice.

Now at the edge of campus, Hiro, Baymax, and Go Go pursued the robot onto the street that led to a main road. The robot crab-walked quickly around vehicles in mild traffic. It reached an intersection with a red stoplight, but skittered with miraculous precision around cross-traffic without a hitch.

Hiro's mind worked swiftly, and he thought for a moment of his late brother. Then realized--

"Baymax, carry Go Go!" he called over the com.

She looked hesitant, confident of her ability, but reached her arms up. Baymax scooped her up and flew over the vehicles below. Hiro sighed in relief. He didn't want to risk another tragedy this year.

The enemy robot re-cloaked itself, dashed under a large truck, attached itself to its undercarriage, and hummed quietly. The wind whistled past Baymax, still in pursuit, and he blinked in surprise.

"Hiro, I can no longer detect the target," he related calmly.

"It can do that too?" Hiro said, and studied various vehicles moving about. He growled in annoyance. Another expo, another stolen experiment. "Let's keep looking," he ordered.

"How?" Baymax asked in simple honesty, and flew straight ahead at reduced speed.

Hiro gritted his teeth, but softly patted Baymax's back. "Okay, let's go back to the others," he decided.

Go Go scowled in frustration. "Can't believe this. But yeah, I guess we gotta,"she agreed. She gazed at the pleasantly landscaped sidewalks, businesses, streets, and many vehicles of the neighborhood.

Baymax flew a wide U-Turn, then increased speed back towards the SFIT campus.

***

Out on the finely trimmed grass, a few onlookers, including Kevin and his father, continued to watch the the gathered colorful heroes with interest. The security guards knew and trusted Big Hero 6, curious about the situation.

Wasabi slashed through the ice much quicker and easier than Fred, and soon he was free.

"Thanks, Wasabi," Fred said casually to the larger man who gave a nod in response.

Fred held up a leg away from the grass and used a small burst of fire breath to melt the remaining ice attached to it, then repeated doing so for the other one. Wasabi looked to the spies.

"Hey, I recognize you from the Expo," Wasabi said, and pointed to Clover. He tilted his head slightly. "How did y'all change outfits so quick?" he asked in surprise.

Before the spies could reply, Honey Lemon, who held chemical ball in case of an attack, interrupted.

"Why did you freeze our friend?" she directed to Sam.

"I thought he was with that other evil robot!" Sam said defensively.

"Yeah, just look at him!" Clover said, flustered. "But he did catch me," she added, after a moment of thought. "Thanks!" she called over to him.

"No problemo," Fred said cordially. "Also, I am not an evil robot," he said to Sam in an aloof tone.

"They were trying to stop the robot too," Wasabi said to Honey Lemon, who relaxed a bit and reattached the chemical ball to her purse strap. A sound of approaching thrusters caught everyone's attention as Baymax flew over to them and landed. Hiro and Go Go hopped off and approached the strangers.

"Who are you guys?" Alex asked in wonder at the reunited team.

"Big Hero 6," Hiro replied with slight shrug. "We help protect the city."

Fred turned to him, nonplussed. "That wasn't very dramatic," he noted.

Hiro shook his head, smiled at him, then looked back at the spies. "And who are you?"

Sam gestured to herself, Alex, and Clover. "We're agents from the World Organization of Human Protection. Seems we're all on the same side," she noted with a sigh.

"It's a long name. Just call it WOOHP. We're from L.A.," Clover explained, hands on her hips.

Alex, hands hung at her sides as looked to the heroes. "We were trying to stop that theft from happening," she said gloomily. "I can't believe we all failed," she added with a hint of anger.

"Yeah, we had a thief at last year's Expo too," Wasabi said. He turned to the young team leader. "Hiro, what happened?"

Hiro looked in resignation to Wasabi, then everyone else. "The robot re-cloaked and vanished from Baymax's scanners somehow, so we can't find it," he admitted in annoyance.

Clover blinked, pulled out her X-Powder, and gestured for the others to join her. "Look, I stuck a tracker on that bucket of bolts," she said, and pointed to a green dot on the display screen. Her eyes met Baymax ,and her smile dropped apologetically. "No offense," she added.

Baymax looked at her with his usual unreadable expression. "None taken," he answered pleasantly.

"Yeah! Great job Clover. Let's go!" Sam said, and the spies all started their jet pack thrusters.

At that moment, the dot vanished.

Clover mutely shut off her jet pack and showed the X-Powder screen to Sam, Alex, and anyone close enough to see it.

"Guess it found the tracker. Could be anywhere now," Sam said in disappointment. Hiro looked down glumly, at a loss for words.

"After all that!" Clover said, and clenched her hands in frustration.

Alex put a hand on her shoulder reassuringly. After a moment, the X-Powder hummed. Clover pressed a button and Jerry appeared with a hopeful look. "Girls. How goes the mission?" he asked. He saw their despondent faces and frowned. "Oh dear. Missions often have a rough start, don't they?"

Hiro and his friends looked on in interest, and Jerry did a double take after he noticed them. "Oh my! You've made friends with a group of colorful heroes, have you?" he asked in surprise.

"Yeah, we were all trying to stop that robo-thief. But it had super speed and could turn invisible. Which means..." Clover said. She looked to Sam, who gestured at her to complete the thought. "The thief stuck the stolen experiments into that robot so it could steal the third one!"

Sam nodded emphatically, proud of Clover's deduction. "You got it Clover!" she said and put an arm over her shoulders.

Clover smiled a bit, and looked to her friend. "Well, I've been hanging around you so many years now, I'm thinking more like you."

They noticed Alex had walked off a little ways and crouched down to the grass. She soon returned with the severed robot tentacle.

"At least we have a clue," she said hopefully, and held it out towards the others.

"Nice," Sam said, and patted her on the shoulder.

Clover pressed an X-Powder button,  which caused a lavender light to pass over and scan the object.

"Very good. We'll analyze the data," Jerry said. "Why don't you stay the night in a downtown hotel in the meantime?"

"Okay Jer," Sam replied. " How about we leave this with you guys in case you learn something else," she said, and pointed to the arm segment Alex held. Alex raised her eyebrows and handed it to Hiro, who managed a small smile.

"Good idea. Thanks," he said, and eyed the severed robot arm with interest.

The spies ignited their jet packs, and prepared to fly away to downtown.

"Hey, we never got your names!" Hiro said in surprise as they lifted off.

"Next time!" Sam said loudly, and they flew off into the distance towards downtown.

Hiro smiled, then saw that Baymax had just finished a scan of Kevin and his father.

"Minor bruising, but no serious injury," the robot informed the relieved patients.

Hiro approached them. "Hey, sorry about you losing your invention," he said.

"It's okay," Kevin replied with a resigned sigh. "Thanks," he directed to Baymax, and rubbed his sore chest absently. "Just can't believe it happened again this year," he added.

Hiro nodded, thought for a moment, then looked at him seriously. "We'll get it back," he said, "can you tell me what your invention does?"

"It powers up machinery to be much more efficient at what it does," Kevin replied with a subtle hand gesture, followed by a listless shrug.

"Hm, let me get your contact info," Hiro said. He pulled his phone from out of a belt pouch, and got the student's number. After a brief goodbye, the colorful group of heroes piled onto Baymax in their familiar formation, and they blasted off to start the trip to return everyone to their respective homes.

A/N: Thanks so much for reading. Please vote and comment if you enjoyed this.  It means a lot to a writer, including me!