I am greatly honored to present you the first Cats-Teen Titans crossover! I thought this was something that should exist, because Cats and Teen Titans are two of the coolest things in this universe. And also other universes, since Teen Titans is part of the DC-multiverse.

I also took my favorite characters from both, Beast Boy and… no spoilers. People who know me will already know who I mean.

Set between season three and four of TT.

oo0O0oo

"Azarath metrion zinthos… Azarath metrion zinthos… Azarath metrion zinthos… Azar-"

"BOOYAH! You're dead, BB!"

"Not yet, I still have five sonic cannon-ammo!"

"Yeah, but you only have ten health points, and I got the Tiger-tank!"

"Dude! Where did you get that one? I've searched everywhe-whoa!"

Beast Boy dropped the controller when a pillow hit the back of his head, very hard. He turned around, rubbing his head, and saw Raven hoovering above the floor at the other side of the main room of Titans Tower. Her eyes were closed and the black circle of magic around her slowly faded.

"Dude, Raven! What did you do that for? Look," he said and pointed at the screen, that showed 'Congratulations, CYBORG215 has successfully killed CHANGELING996'.

"I am trying to meditate. Tiger-tanks don't exactly help. Azarath metr-"

"Friends, let us not fight!" Starfire came flying across the room with a bowl of something that suspiciously looked like one of her traditional Tamaranian dishes. "Today is the day of the arrival of the season of autumn, and I want to celebrate that with a meal of zorglik kanterpeals!"

See, Beast Boy thought.

"Uh, no thanks Star. I already had two entire burgers today, so I'm not really hungry," Cyborg said, looking almost as green as Beast Boy when he saw the bluish green goo in the bowl.

"Where do you even keep getting the ingredients for those things?" Raven asked, also examining the… stuff.

"Oh, I would be most pleased to tell you! On the day of Marflarb, I go…"

It looks like the suddenly opening doors of the room saved the three Titans from a long story full of words they didn't understand anyway, because when Starfire saw Robin entering the room, she stopped talking. That was, until she started talking again.

"Robin? Is something wrong? You look worried, and at this time you are normally doing the working out!"

"Titans, meeting," he said, and walked to the television, unplugging the gaming console.

"Hey, I was just winning!"

"Too bad, Cyborg," Beast Boy grinned.

Robin's face, however, was serious. "Titans, we have a mission."

"What?" Cyborg shouted.

"Dude! We did Cinderblock on Monday, Control Freak on Tuesday, Plasmus on Wednesday, Mumbo on Thursday, Dr. Light on Friday, and now it's finally weekend, and you're telling me we have another mission?"

"Beast Boy, if the city is in danger, we must help. That's why we're superheroes," Raven said.

"It's not in our city, Raven. I received this message from Scotland Yard about a week ago. I waited until it was calm and peaceful here, like it is now, to show you."

"Wait, Scotland Yard? Does that mean…"

"That's right, Raven. We're going to London."

Two more 'WHAT?'s were heard from the direction of Beast Boy and Cyborg.

"Man, you're thinking that I'll go to London? I fought Mad Mod too many times to look forward to that!" Cyborg shouted even louder.

"Can't we send Titans East? It's not like they're too busy!"

"Beast Boy, Cyborg, calm down! In the real London, there aren't any hypnotizing screens hanging there, or palace guard robots shooting at you. It is a normal city, a bit like Gotham, but with less psychopaths."

"Then why do we have to go there?" Raven asked.

"To catch who they call 'The greatest criminal on earth'."

"Please don't say Slade is back."

"No, fortunately not, but there have been many crimes recently, and all evidence seems to lead to one mysterious criminal;" Robin switched on the television screen, which showed a series of pictures: a greenhouse with broken glass, a rifled jewel case, and some trellis that looked like it was past repair. "The Hidden Paw."

"The Hidden Paw?"

"Indeed. That's what they call him. His actions variate from minor to major crimes. Regular robberies, bank heists, vandalism, even just stealing a bottle of milk. He never leaves a trace, except for this. It was found on every crime scene." He showed the other Titans an evidence bag with a small card that said "The Hidden Paw was here". However, when he flipped it over, there was something written on the backside: "Or was he?".

"Well, he sure likes people to know who he is," Raven said. "The question is: who is he really?"

"That's what we're going to find out!" Robin said with a small smile.

"But how will we get there?" Starfire asked.

oo0O0oo

"Dude, I didn't even know this thing was still alive!" Beast Boy said as he watched the T-sub. "Didn't Brother Blood's drones destroy it?" (season 3, episode 8: Wavelength)

"They did, but I managed to repair it with a little help of Aqualad."

"So we're gonna go all the way across the ocean in this thing?" Cyborg asked. "Why can't we just use the T-car?"

"Because a car can't travel across water, smart-ass," Beast Boy said while getting in the center cockpit. He grinned and quickly closed it to ban Cyborg and his comebacks out of his mind.

Beast Boy enjoyed the silence of the sound-proof cockpit. Few people knew that he sometimes just wanted to be left alone, like Raven.

Of course, the peace was short.

"Beep… crack… Yo BB, you think that I don't know that? I was just saying that maybe we could just…"

Beast Boy stopped listening. Unfortunately, you couldn't turn off the radios in the sub, so he just let Cyborg complain while thinking if there were any deaf animals he could transform into.

oo0O0oo

Okay, he liked some silence, but when you're miles under the sea for hours, it gets annoying too. Cyborg's insults only lasted about half an hour, and then he had just put one of his crappy cd's in the radio. Some short conversations had been made, but nothing interesting.

Finally, Beast Boy couldn't hold himself anymore.

"Hey Robin, here's a good one: what's the difference between Batman and a robber?"

Robin sighed. "What?"

"Batman can enter a shop without you! Get it?"

He received four weird looks from the other cockpits.

"Without you! Without Robin, like… without robin'… Get it?"

Raven was the first person to say something. "Wow, Beast Boy, that was even below your level of humor."

"Come on guys!"

"You wanna know the difference between you and the Joker?" Cyborg asked.

"I'm not a crazy criminal?"

"No, the Joker is funny!"

"Dude!"

"Cyborg, it's not because he's called the Joker that you can joke about him! Haven't you heard about Jason?"

"Whoa, calm down, Rob!"

"Doesn't matter. Titans, get ready to dock."

oo0O0oo

The five Teen Titans were standing in a dark alley of London. Robin was explaining the plan.

"So, the most recent crime scene was that house. The owner's Pekinese has been stifled two hours ago."

"Dude, who would do that?"

"According to the victim… the owner, not the dog… the window that lead to this ally was shattered."

"Here it is!" Starfire shouted, lighting the dark alley with her star bolts.

"Wait a minute," Cyborg said, "This window is only ten inches wide!"

"That means that the Paw that is Hidden must possess some kind of superpower!"

"Indeed, Starfire." Robin checked the shards on the floor to see if there was some evidence left behind. "Maybe he can change his size, or transform into animals, like Beast Boy."

"What's this?" Raven pointed at a piece of the window that was still in place. Some ginger hair was caught on the sharp tip.

"Looks like the Hidden Paw is a redhead!"

"Okay Titans, here's the plan: the suspect can still be in this part of the city. We'll split up and search this entire section!"

"Split up? Why do we have to split up?"

"We have a bigger chance to find him. There's no danger: as far as we know, he hasn't done serious harm to any people."

"What's the matter, BB? Scared to walk alone on the street at night?"

"We'll see who catches the Hidden Paw first, Cyborg!"

"We'll do this: Cyborg, you walk down the Thames. Raven, you check those streets over there. Starfire, watch the entire area from the air. Beast Boy, go in the direction of the junkyard. I'll ask people if they saw a suspicious red-haired man."

"Dude, why do I have to go to the junkyard?"

"You could transform into a rat," Raven said. "You would fit in perfectly."

"We have no time to lose," Robin commanded. "Titans, GO!"

oo0O0oo

Beast Boy slowly walked through yet another alley.

"A rat… Who does she think she is? 'You would fit in perfectly, now if you'll excuse me, I have to azarath my metrion in the zinthos over there.' She and Cyborg won't be laughing anymore if I catch him without…"

He stopped. He swore he heard a sound from somewhere. He slowly turned and…

"WHOA!" He jumped out of fear when a dark figure leaped towards him. Beast Boy spun around and ran as fast as he could. The thing chased him through the street, until he saw the chance to jump in a cardboard box and the thing kept running in the same direction.

A cat, he thought. What a stupid idea to walk around as a rat in a cat-filled area anyway. I know! Why don't I become a cat myself?

He quickly morphed, and walked out of the box looking like a cat. Except for the green color, of course.

He continued to walk in the direction of the junkyard, now looking around more cautiously. He peeked his head around a corner and…

"Hello there!"

Beast Boy, still in his cat-form, jumped again, and hissed.

He looked around, searching for the owner of the voice, but the only living thing he saw was a white brown-patched cat sitting on a garbage can.

oo0O0oo

A/N: Duh-duuuuh! So who is the owner of the mysterious voice? And who is the Hidden Paw? (I'm only writing this for the Teen Titans fans who don't know Cats, but still decided to read this, and can't guess what Cats is about by its title, and didn't read the characters displayed in the information about this story)

Note: 'Jason' refers to Jason Todd, the second Robin, who replaced Dick Grayson as Batman's sidekick when Dick joined the Teen Titans. Jason was killed by the Joker.

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