Hirosplosion

The Ultra Beast known as UB-06: Fission charged at a helpless Catherine. Catherine wanted to get out of the way, but found herself frozen to the spot in terror. "SPLOOOOOOO!" The Beast roared. Suddenly, a wall of darkness shot up between Catherine and the Beast, blocking the Beast's attack. Catherine looked back to see that her Mimikyu had used Shadow Sneak to protect her. Catherine breathed a sigh of relief. "Thanks, Mimikyu." She said gratefully.

The others all got up as Mimikyu and Hau's Raichu took their places in front of their trainers, ready to battle the Beast. Anabel drew a Pokeball from her belt. "Alakazam, help them out!" She exclaimed, throwing out the ball. From it appeared her Alakazam.

"Kazam!" The Pokemon roared defiantly.

Anabel turned back to Looker. "Mr. Looker, you know your assignment." She said.

"Right, chief!" Looker ran off back down the hall. Catherine suspected he was going to be providing backup like the last time she had faced the Ultra Beasts.

"Rotom, can you tell us anything about the Beast?" Catherine asked.

"I'd be happy to!" Rotomdex said. It scanned the Beast. "Hirosplosion: The Exploding Pokemon. A Fire and Dark type. This creature, known to originate from Ultra Space, has a body made from a living nuclear explosion."

The Beast known as Hirosplosion appeared to have recovered from Mimikyu's Shadow Sneak attack. It roared and began charging up a ball of fire in its hands. "It's going to use Fire Blast!" Rotomdex warned.

Hirosplosion let loose its Fire Blast attack. "Raichu, use Psychic to shield us from it!" Hau commanded.

"You too, Alakazam!" Anabel added.

The two Pokemon both created a barrier of Psychic energy, but it wasn't strong enough to keep the fire from crashing through it. "Kyu!" Catherine's Mimikyu jumped in front of the blaze just as it was about to hit the other Pokemon. Its Disguise ability kept it from being hurt, but now it would be vulnerable to attacks.

"Mimikyu, use Play Rough!" Catherine commanded.

Mimikyu lept at Hirosplosion, but was sent flying back by a powerful Fire Punch attack. "Mimikyu! Are you okay?" Catherine yelled worriedly.

"Kyu!" Mimikyu responded, getting back up, ready for more.

Hirosplosion then charged up a ball of Dark energy. It fired it at Anabel's Alakazam, using Dark Pulse to attack it. Alakazam took the hit, causing it to take a lot of damage. Fortunately, this was all part of Anabel's plan. "Now, Alakazam, use Disable!"

"Kazam!" Alakazam sent out a wave of Psychic energy, preventing Hirosplosion from using Dark Pulse any more.

"Raichu, hit him with Thunderbolt!" Hau commanded.

"Rai rai RAAAAAAAIIII!" Raichu yelled, charging up electricity and firing it at Hirosplosion. The Beast took the hit, but didn't seem shaken by it. It charged Raichu, attempting to use Fire Punch again.

"Mimikyu, hit him with Shadow Claw before he can get to Raichu!" Catherine yelled. Mimikyu jumped up, using its black claw to slash at Hirosplosion and sent it falling to the ground.

"Now, Raichu, use Focus Blast!" Hau said.

"Raaaaaaiiiichu!" Raichu exclaimed as it shot a ball of orange energy at Hirosplosion. The Beast couldn't get up in time and caught the attack right in its eye, creating a critical hit for an already super-effective move.

"Catherine, Hirosplosion is low on HP!" Rotomdex told her. "This is the perfect opportunity to catch it!" Catherine couldn't agree more. She pulled out one of her Beast Balls.

"Beast Ball, go!" She yelled, throwing the ball at Hirosplosion. Unfortunately, Hirosplosion was ready for it. It fired a Fire Blast attack, completely incinerating the Beast Ball. It then summoned a thick cloud of smog. Catherine, Hau, and Anabel all coughed as the smog went away. When it was gone, so was Hirosplosion.

"It must have used Smokescreen to escape!" Rotomdex observed.

Anabel pulled out a walkie talkie. "I want all units deployed to be looking for the UB." She said into it in an authoritative voice. "We cannot let it get away."

Catherine went over to look at the remains of the Beast Ball she had thrown at the Beast. It was charred and almost completely destroyed. "That is one powerful Ultra Beast." She said quietly.

Hau, meanwhile, was celebrating. "Yes! We totally won! Woohoo!" He shouted happily. "We sent that Ultra Beast running with its tail between its legs!"

"That's not something to celebrate, Hau." Hau turned to Anabel. She had a serious look on her face. "If that UB is still out there in the world, that means it can still cause trouble." She said. "We need to find it and capture it as soon as possible." She turned to Catherine. "Catherine, I hope you don't mind, but we'll need you to stay in Deesee until the UB is captured. We still need your help."

Catherine honestly didn't want to stay any longer in Deesee. She kept thinking about how many challengers she was missing at the moment back in Alola. If she wasn't around to face them, she would have to forfeit her title as Champion. However, she knew her duty to stop the Ultra Beasts was far greater than her title, so she said "That's fine. Hau and I can stay at the Pokemon Center here in town."

…

"I can't believe it survived in all the chaos."

"Well, it's a good thing it did."

Anabel and Looker were in an elevator at International Police HQ. They were heading for one of the lower floors of the building. Catherine and Hau had already left for the Pokemon Center and were most likely asleep for the night. "I'm not so sure it is a good thing, Mr. Looker." Anabel said as the elevator continued going down.

"Anabel, you know what the higher-ups said." Looker replied. "This might be the best way to once and for all get rid of the Ultra Beasts. To stop them from causing chaos and destruction everywhere they go."

"I know." Anabel said quietly. "I just don't think it's right to kill a Pokemon. Even if it is an Ultra Beast."

Looker looked away from Anabel. "We have to do what's needed to protect the world." He said. "And, if Project DM-Ultra is what can get the job done, then we need to see it through to the end. We need to do whatever it takes."

They reached the floor they were heading for. At this point, they were about 10 stories underground, underneath the International Police HQ. They walked down a dimly-lit hallway until they reached a steel, vault-like door. Looker swiped his ID card to open the door. Inside it was a laboratory. Several scientists were hard at work. In two different glass chambers, two different Pokemon were being experimented on. One Pokemon appeared to be a bird made entirely of white gas that frequently combusted into flames as the scientists performed their tests on it. The other Pokemon appeared to be a quadrupedal creature whose form constantly shifted, first becoming black stone, then shifting to pale, amorphous goo, then to bright, shimmering diamond. Anabel and Looker observed the two Pokemon that would soon be ready to become the weapons needed to defeat the Ultra Beasts.

"Whatever it takes."