A/N: So... still having a writer's block. I already had this chapter written though, it's a continuation of Jack Spicer, Evil Genius and Penpal? So for the people that wanted to see more of our favorite evil genius, here you go. Now if you'll excuse me, I need something to stimulate my brain again. *wanders off for inspiration, instantly mauled by bear with the words WRITER'S BLOCK shaved into its side*

Disclaimer: I don't own Katekyo Hitman Reborn! or Xiaolin Showdown.

Jack Spicer, Evil Genius and Penpal: Vongola's New Inventor

When Jack dropped by for a surprise visit, he was not expecting to be met with a combination of gun fire and explosives. "Gokudera! Reborn! Knock it off, that's Jack!" Tsuna says, shielding the goth defensively. "And I thought a stone door to the face was my worst greeting." Jack says shakily, cowering behind a Jackbot. "Sorry about that, everyone's been on edge recently. That's why I told you to call before you visit." Jack's lip quivered. "But I wanted to surprise you! How was I supposed to know you were housing psychopaths?" The genius whined.

Tsuna deadpanned. "Jack, your goal in life is to take over the world. You're not normal either." He says bluntly. "I'm a genius and get bored easily. You know that." Tsuna sighed, he knew it all too well. When he would read Jack's letters about the teen causing chaos it always felt like he was living vicariously through the albino. It was only when Reborn entered his life that things got interesting.

"Jack this is Gokudera and my demon tutor Reborn." Tsuna introduced, Jack looked at Reborn in bewilderment. "You never said anything about him being a cursed baby. Who the hell did he piss off?" Jack asks bluntly. His first thought would be the monks, they were against the whole killing thing so it sounded like their M.O. to chibify someone evil.

"A curse?" Tsuna never really thought about why he was a baby but with all the insanity in the mafia it made sense. He just written Reborn and his colleagues conditions off as dwarfism. That and he knew questioning Reborn about anything would lead to more hellish training. "Yeah, you'd be surprised how much supernatural mumbo jumbo actually exists. I have an actual ghost that actually lived in my basement." He says with a shrug.

Reborn noted, much to his satisfaction, that the red head was a Lightning and already had a bond with Tsuna. The automaton was interesting and he kicked it, not expecting it to break apart easily. "Dude, do you know how long it takes to rebuild those?! And I don't have any of my tools, not cool!" Jack fumed.

XoXoXoXoXo

The first response I-Pin and Lambo had to Jack was screaming. Tsuna sighed. "The make up doesn't help." Jack just shrugged. "I already know I'm a freak, might as well take advantage of it. Besides, it keeps my skin from burning." Tsuna winced. "At least you're not involved with the mafia." As soon as Jack turned his sparkling red eyes to Tsuna, he regretted saying anything.

"Seriously? Have you had any gun fights? Did you meet the godfather?!" Jack asks, shaking Tsuna for answers. "Jack, stop it. You're making me dizzy!" Jack reluctantly let him go. "I want all the details. You know I'll keep annoying you until you do." Tsuna groaned. "Fine, but you have to tell me about the supernatural stuff."

"So it turns out that dad is in the mafia and I'm the descendant of Vongola's founder. There's this other guy named Xanxus that wants to take over the family and we're going to fight each other for the position. I'm still trying to find someone to take Lambo's place, I'd rather not send a five year old into battle." Tsuna says with a grimace. They were both drinking chocolate milk, ignoring the explosions and cursing in the background. "I'm fighting against monks with elemental powers for mystical items called Shen Gong Wu. The powers can be cool or useless, my personal favorite is the Monkey Staff." Jack says.

"So you do have experience fighting then." Jack squeaked, latching onto an annoyed Tsuna. "No Reborn, we are not introducing Jack to the mafia." He says sternly, his eyes narrowed. Reborn ignored the teen and turned to Jack. "Vongola will be willing to pay for whatever inventions you can think up, so long as they are used exclusively for the family." If Reborn learned anything after years of being around Verde, it was that the best way to earn a inventor's loyalty was giving them money to fund their research. "That sounds awesome! How do I sign up?!" Tsuna face palmed. Why couldn't he have normal friends?

XoXoXoXoXo

"So you want me to take the brat's place. You do know I have my ass kicked by ten year old kids on a weekly basis right?" Jack asks, Reborn hit him in the head with a mallet. "You're an inventor, invent something." The hitman states. Jack eyed the credit card that Reborn handed him and had an epiphany. "I can finally afford to make those upgrades to my chameleon bots! Just give me a couple days." "It isn't going to try killing us like Robo-Jack is it?" Tsuna asks warily. "The chameleon bots are the ones that are cheery all the time, they shouldn't be a problem."

When the Varia and Tsuna's guardians arrived at Namimori Middle, Xanxus noted that the brat picked up two new additions. One was a teenager in a black trench coat and vibrant red hair, the other appeared to be a blonde girl with a preppy smile. "I can't believe I'm actually seeing mafia men in person, you guys make Tubbimura look like a wimp!" Jack exclaims. "Jack, please fanboy later. They want to kill us." Tsuna groans. "But Tsuna, they have a robot too! If we break it, can I take it back to my lab to fix it up?" Jack asks, giving Tsuna his best puppy eyes. "If there's anything left after Hibari attacks it, go ahead." The brunet says, ignoring Jack's maniacal laughter.

The first battle had been for the Sun ring. Jack might not have been the most skilled fighter, but he was a genius. As Ryohei and Lussuria fought the chameleon bot recorded every movement, adding the techniques to its database. Jack doubted it could replicate the energy blast Ryohei pulled off, but he already had various martial art styles downloaded. He still didn't have any footage on Chase, the man always seemed to know he was being recorded and his camera would be destroyed.

"Tomorrow will be the Lightning battle." One of the Cervello women droned, Jack raised his hand. "Yeah, clone ladies? We're allowed to use robots right?" He asks, pointing to the Gola Mosca the Varia had. "It can be a substitute as long as the guardian is operating it." Jack grinned. "Awesome. Can't wait to test my invention out. Later losers!" Jack cackled, activating his heli-pack to take off into the sky. Tsuna just looked to Reborn and deadpanned. "You have no idea what you've just unleashed on the world. He'll have a robot army built in a week." Tsuna says bluntly.