NekoShard: "Hi! This is my first crossover fic so give this a chance and don't immediately back out of this. I know it should be in the crossover section, but no one ever checks there so I just put it here. :P"

Raph: "Going against the rules? Huh, you may not be a lost cause after all!"

NekoShard: "Shut up. Anyways, enjoy!"

Donatello sat alone in his lab, yet again analyzing a sample of mutagen to try and figure out a retro mutagen that would not freeze or cause someone to breakout in the world's worst case of acne. Outside his doors, he could hear space heroes blaring from the TV and Raph shouting over it,

"Hey Leo could you turn it up a bit more? I don't think the construction workers in metro station eight can hear your stupid show."

"Dude, he probably shouldn't do that," Came Mikey's voice. "It might, like, let them know we're down here."

"That was my point, doofus!" Snapped Raph. Donnie could imagine him rolling his eyes.

"Wow, I can't believe that you want to be discovered! I thought that you- OW!"

A sharp smack cut Mikey's words short. Raph must have hit him over the head.

"Shhhhhh! It's just getting good!" Came Leo's voice.

Donnie sighed. Yet again his brothers were enjoying some down time together, relating through pizza, TV, video games, and some brotherly fighting. None of those ever helped him to fit quite right. He was the tallest, the brother with the gapped toothed smile and slightly OCD personality, the one who was introverted and preferred science textbooks to comics. He was the only one who had a crush that he was still really into even though she hated him, and he wasn't the greatest fighter either, that paired with the fact that he disliked causing anyone harm.

With a sigh, Donatello set aside the beaker of congealing "retro-mutagen" in discouragement.

"It's no use, I'll never get this right!"

Suddenly, the door to his lab opened and Leo stood in the doorway saying,

"Hey Donnie, it's time for evening patrol."

"Oh, you're right, I guess time got away from me."

Standing, Donatello joined his brothers as they raced through the sewers and climbed out of the manhole that served as one of their main entrances to the human world above them, New York. Once above ground, they climbed to the roof of one of the houses and began patrolling the streets from above, always on the look out for mutagen canisters, or the Shredder and Kraang's troops. They moved quickly and with a grace that would have surprised most who were only familiar with stereotypical turtles. As they leaped from rooftop to rooftop, the four brothers appeared as little more than darker shadows against an already dark sky. They completed the routine patrol and were about to head back, when Mikey yelled,

"Dudes! Check this out!"

The others were at his side in a flash, ready to fight. They relaxed when they saw yet another empty alleyway. Raph sheathed his Sais and growled,

"Geez Mikey, don't get me excited like that for nothing."

Grinning like a kid, Mikey leaped into the alley and returned with a large flat box.

"Well be excited bros 'cause we have pizza!"

Lifting a slice with an expression close to reverence, Mikey lowered the steaming food towards his mouth. THWACK! A strong blow from Donatello's Bo staff sent the pizza spinning from his brother's hand to land with a wet splat on the rooftop.

"Hey what was that for?"

Donnie returned his weapon to its holder across the back of his shell and said seriously, "Think Mikey! Does it make any sense that fresh, warm pizza in would just happen to be lying on the ground, unguarded and ready for us to eat without any danger?"

Mikey beamed, "Yes!"

"NO!" Snapped Donnie in exasperation. Leo gingerly picked up a piece and examined it closely. He sniffed it and then nibbled the end.

"It seems alright…I wouldn't worry about it Don; the pizza delivery kid comes through here pretty often. He must have dropped this. Look, you can see fresh tire tracks on the ground there."

"What are we waiting for?" Mikey asked, pushing forward, snatching up another slice and taking a huge bite. "Let's eat! You do realize that alleyway pizza is number eight on my top ten favorite types of pizza, right?"

"Didn't know; don't really care. Gimme some of that!"

Raph joined them and tossed his scientific brother a large piece of the food before shoving some in his own mouth. Nervously, Don reexamined the pizza and then smelled it again, something didn't seem right. Underneath the delicious, steamy scent of cheese, sauce, and pepperoni lay a faint, bitter smell. Careful not to swallow anything, Donatello took a small bite and let it rest on his tongue. His suspicions were confirmed; there was a definite unnatural flavor masked by the pizza.

His quickly spat out the small piece of food and then spat twice more to remove as much of whatever it was that had been in the food from his mouth as he could.

"Guys, there is definitely something wrong! I think we walked right into a-"

The shadows around them began to move, seething with Karai's Foot Bots as they formed a ring around the four brothers.

"Trap…" finished Donnie weakly as he drew his weapon once more.

"Aw yeah!" Cheered Raph, "Pizza and a chance to beat up the Foot? Can this night get any better?"

"If we get home safely, yes," replied Leo as he charged the nearest group of robots.

Mayhem erupted on the roof, Mikey was swinging his nunchucks at lightning speed, Leo was serious and deadly with his twin kasawas, Raph was having the time of his life as he tried to knock out as many enemy ninjas as he could, and Donnie was twirling his staff skillfully while trying to determine a possible weakness that could be the Foot Soldiers undoing.

Suddenly Mikey faltered and dropped to his knees groaning, "Dudes, I'm really not feeling so good right now…"

Immediately, Raph and Leo moved to defend their little brother while Donnie knelt by him to see what was wrong.

"Where does it hurt, Mikey?"

"Ugghnn…my stomach…I think I'm gonna hurl…"

As gently as he could, Donnie moved his orange masked brother back against a wall to make it easier to defend him. As he laid his hand against Mikey's forehead, Donatello's arm was roughly jostled by Leo as his eldest brother stumbled back against him, head in his hands.

"Guys we need to get out of here! I'm feeling really…woozy…" Leo trailed off and slumped to the ground, unconscious.

"Aw shell!" Growled Raph, as he blocked a powerful sword stroke with his crossed sai blades. "You'd better find a way to get Leo back in action soon Donnie or we're all going down!"

Donnie stood and began assisting Raph who looked at him in surprise, "You fighting the Foot with your blade out? You sure you can handle it?"

Knocking aside a knife, Donatello snapped, "Thank you for the vote of confidence, Raph! It's good to know you have that much faith in my abilities. Now give me some help!"

The two of them were not accustomed to fighting as a team since Donnie usually fought with Leo and Raph teamed up with Mikey during training, but they managed to avoid major injuries. Suddenly, Raph let out a cry of horror and stumbled back. Donnie quickly moved to his side and put out a hand to steady his elder brother. Raph clumsily groped for something at his belt and then dashed a smoke bomb to the ground.

Donnie blinked and coughed as he waved the smoke away to see the lair before him. Raph was on hands and knees, hands clenched.

"What's wrong, Raph?"

The red masked turtle snarled, "I can't see! What the shell is going on?"

"Wait here," commanded Donatello as he rushed into his lab, returning with several needles. Before Raph could move, He had gathered a sample of his blood and then proceeded to collect a sample of Mikey and Leo's.

"I'm going to analyze this to see if I can find a cure for whatever drug was in that pizza. It shouldn't take too long."

And it didn't, in half an hour, Donatello returned and injected his brothers with the antidote. Mikey came to first, sitting up and grinning as if he had never been in pain. Then Leo woke up and Raph's eyesight returned.

"Nice work Donnie," complimented Leo. "I'm glad that you were here to give us a hand, otherwise tonight might not have ended so well."

Mikey nodded seriously, "Yeah, I might have thrown up all that pizza! I'd feel awful if it was wasted like that!"

Donnie wasn't paying attention and was looking at his note pad while his brothers turned to their TV show.

"It appears that this poison was a weakened form of mutagen, designed to disable the consumer, nothing more. However this shows that it is possible to alter mutagen so that it will not have uncontrollable effects." Excited now, Donnie continued, "If I can analyze this and determine what was used, I might be able to make progress with that retro mutagen! And if I can then turn April's dad back to normal, she might finally listen to me and realize how I-"

Raph turned to look at him in annoyance. "Are you seriously going to talk about April again?"

Donnie was confused, "Yes, why not?"

"Oh no reason aside from the fact that you talk about nothing else! Is April the only reason you're making that retro-mutagen? What about all those other people who've been mutated? Aren't you trying to help them?"

"O-of course, but-"

"Then act like it!" Snarled Raph, shoving his face so that it was right in front of his purple-masked brother, not an easy feat since Donnie was several inches taller. "Quite mooning over April and get your head in the game and start working for others, not just yourself."

Donnie's patience snapped and he grabbed Raph by the shoulders and spun him around yelling, "Oh, and you aren't working to help yourself when you go and get us into every fight imaginable, even if it isn't necessary?"

Raph seemed startled and began to object, but his brother cut him off.

"I know what you think, "Donnie spends all his time in the lab, he can't fight well with that stupid stick, he's got no chance with April!" Well news flash: I have dreams and wishes too! You think people don't understand you, Raph?" He jabbed a finger at Raph's plastron. "Well try looking at something from my point of view for once!"

Now looking angry, Raph shoved Donnie away from him roughly, causing his brother's shell to smash up against the wall, "Geez, do us all a favor and shut up, Donnie! I don't wanna hear it!"

As Raph stalked back to where Leo and Mikey sat, staring in stunned amazement at the fight before them, Donnie's hands slowly curled into fists. Then, snatching up his staff and thrusting it roughly into its holder, he stormed out of the Lair and into the sewers, slipping into a hidden sewer line that lead to the surface. Roughly dashing the tears of anger and hurt from his eyes, Donatello ran as fast as he could. He didn't look back.

NekoShard: "Okay, I am uber excited about this story! I mean, I am combining two of my favorite TV shows and two of my favorite characters, so this should get interesting. Please review if you like it!"

Raph: "And if you don't like it, still review or I'll smash you into a-"

NekoShard: "Yes, thank you Raphael." Covers Raph's mouth "What he means is please tell me what I can do to make it better if you don't like how I wrote this."