This is my first fanfic, so we'll see how it goes. This is a crossover between Ironman Armored Adventures and Young Justice. I'm really surprised that I haven't seen a crossover between these two yet. For continuity's sake this is set after the episode where Ironman meets Jean Grey (because I can't find the next episode online), and during the five-year hiatus on Young Justice. I'll try to fill in a few of the mysteries that the show has left. Anyway, enjoy, and review.

Disclaimer: I do not own Ironman or Young Justice. Seriously do we actually have to say that? I do own the villain I made up, however.

Riiiiiiiiinnnnnnggggg!

"Oh, [bleep]!" said Tony, as the late bell rang, "I'm late for physics!"

He raced down the hallway, and made it to the classroom as a teacher that looked an awful lot like Michio Kaku was writing some big mathematical thing on the board.

"Late again, Mr. Stark," said the professor without even turning to look back, "That's what, the fourth time this month?"

"Sorry professor," Tony apologized, embarrassed "I'll try not to let it happen."

"Well, since you're already up, Can you tell me what I've just written on the board?" The professor asked. The equation on the board was filled with Greek letters, numbers and some unrecognizable squiggles.

Tony replied calmly, "That's the equation for the Phased Multi-Verse Theory. It states that every action that can happen does happen and forms a separate universe where the alternate action occurred. The probability of a certain action happening is also the fraction of universes in which the action happened. Oh and by the way you made a little typo. The quotient should be R not Q. If you left it that way you get infinity."

The professor stood flabbergasted. He stared at the equation for some time and finally conceded his error "Yes you're right Tony," as he went to fix the equation. Tony sat down with his head held high as the other students stared at him trying to figure out how he knew what the heck that stuff even was.

Later:

"How did you know all that stuff in physics, man?" Rhody asked Tony over the phone, "I have to study this stuff for four hours each night just to comprehend it, well you probably could've given the lecture yourself."

Tony replied from high over Manhattan, "Come on Rhody, I read that kind of stuff for fun." Tony was patrolling the city is Ironman while Rhody a.k.a. War Machine was stuck at home studying metaphysics final the next day.

"Shouldn't you be studying right now?" asked Rhody.

"I know that stuff inside and out," replied Tony, "do you really think I need to -" Tony was cut off right there, as a blur plummeted to earth right in front of him. "I'm going to have to call you back," Tony said and then hung up. Ironman dived to catch the falling object that as he approached turned out to be a person. He caught the person about 200 feet above Broadway Street.

"Thank you" said the man, whose hair looked a bit like a flame.

"No problem," replied Ironman. He looked up, "where did you fall from anyw-" he was cut off midsentence again, this time by the man's fist connecting with his chin. The force was enough to make him drop the person. The plummeted 200 feet to the ground, smashing a car that was parked in front of the theater. A few seconds later, the man got up, and brushed off his black jacket.

"What?" Asked Ironman, to no one in particular, as he observed the strange spectacle. Just then, S.H.E.I.L.D. hovercraft approached from behind and encircled the mystery man.

"Attention thief," said a voice on one of the hovercrafts loudspeakers, "hands in the air or we shoot! Return the stolen property now!" The man calmly raised his hands above his head, then quickly slammed his left hand into some device on his right wrist. There was a blinding flash. When the light dissipated and sight returned to Tony's eyes, the hovercrafts are all disabled and the mystery man was nowhere to be seen. He quickly descended to assess the damage.

"Is everyone all right?" Ironman asked a S.H.E.I.L.D. agent getting out of a hovercraft.

"We're good here," replied the agent, "EMP wave. Knocked out the electronics. That was it"

"Who was that guy anyway? What does S.H.E.I.L.D. wants with him?" Asked Ironman

"I've got no idea who the guy is. But he stole some very high tech bio-enhancements from the Helicarrier," the agent replied.

"Extremis?" Ironman was pretty sure he already knew the answer.

"That and some gamma tech," replied the agent.

"[bleep]! I got catch this guy, now!" Ironman said as he took off, "Computer, identify the energy signature of the blast and see if you can track it."

Scanning replied the feminine computer voice, scanning complete. Energy signature located. A map of New York City was displayed on his view screen. There was a bright yellow dot over Times Square.

"Uh-oh," I meant that off towards Times Square. There is a huge crowd of people there that were all gawking at him. The villain's obvious red hair could not be seen in the crowd.

"Come on, where are you?" Ironman asked himself, "Computer do a localized scan for the same energy signature."

Scanning the computer augmented his video input with radiological data. They're very bright signature was reading from a person in the crowd.

"They you are," said Ironman. The move towards the signature, but instead of the redhead Caucasian man that he had caught earlier, readings indicated a bald African man, but face was still the same. "Crafty little guy. Just give back the stuff you stole."

"Well, now. I see there's no need to keep up this disguise, then," said the mystery villain. His features changed slowly. His red fiery hair grew back into place. The dark skin changed into a strange blood red color. He closed his eyes for a moment. His eyes were a nice shade of blue, but when he opened them, the entire eye was a strange shade of orange, and the pupil had become a small slit. But the most obvious and disturbing thing were two horns that grew out of the side of his for head. He looked a bit like an old-fashioned devil minus the pitchfork and the forked tail. The crowds quickly dispersed.

"I did not see that coming," Ironman replied. He blasted the demon with a repulsur ray. The demon just stood there absorbing the attack. His mouth opened and a blast of fire erupted from it. Ironman barely dodged the assault and bombarded the assailant with several mini missiles.

The demon glanced at the missiles and just said "Tick." Demon vanished into thin air as the missiles collide with each other and exploded where he was 1 millisecond before.

"Tock" Ironman heard from behind him. The demon had reappeared just behind him and slashed at him with a red blade attached to his forearm. Ironman went flying 20 feet that street until he collided with the asphalt and bounced another 20 feet.

Beep!

The sound came from the device on the demon's arm that had been transformed into a sword.

"Oh, looks like it's time for me to leave," the Demon said with a smile. He motioned toward the device.

"Oh no you don't!" Said Ironman. Thrusters on full, he launched himself straight into the demon, grabbing the device in one hand, crushing it. There's a huge burst of light and then, nothing.

Insert theme song here.

Yeah I didn't get to the young justice parts yet, but they're coming. The "demon" is supposed to be the main villain of the series I made up called "Adventure in the Sky." He the fire-breathing, time-traveling alien. I'll have to get that up on fiction press at some point. Anyway please review.