A/N: Here we go, another chapter. Enjoy!

Donnie had been enjoying not having to worry about his bag and equipment once they started to eat. Seeing Mikey fiddling with the new palmtop he had been building had taxed his mind. Leo hadn't stepped out of playing Mikey to tell him to lay off fiddling with it, so he guessed it was nothing serious. So he kept up with the Raph persona, scowling at the currently Purple masked turtle. He wondered when April would start to talk to Mikey thinking he was Donnie, and how long it would take for her to realise. He had the lightest colour of the four of them, and he was currently playing the role of the turtle that had the darkest colour. He wondered how long it would be until the human called them on it. He had just gotten up to reach across the table for another slice when the door banged open and Casey came in. He had just enough time to put the plate down before the large human barrelled in and wrapped him in a hold.

"Raph, it's been ages man. How you doin'?" Donnie managed a growl before he was pulled from the table at April's cry of "Rough house away from the table!"

"Good Case." Don managed to mumble, before he started to try and extract himself from the human's hold.

"No Purple Dragons, no Hun, no Foot; dis town's a whole lot quieter without 'em. I can focus on the garage for a change." He said as he released him.

Don coughed to cover his lack of grumble. "Yeah, it's been pretty boring without 'em." He managed to get the accent his younger brother had just about right, but he just couldn't get the growl in it. He was saved from further talking as the human male noticed the pizzas and attacked them, Donnie following suite so he wouldn't have to talk.

As the food slowly vanished, he started to worry about what would happen next, because as soon as Casey tackled him and wanted to wrestle, he would know that he wasn't Raph. He was saved by Leo, and Donnie was thankful for his big brother. He also noticed that he was constantly hiding his left side from the others, making sure his right was always to them to hide the missing chunk on his shell.

"Casey, you got that new game you were talking about the other day?" he asked in a pretty good copy of Mikey when he gets excited.

"Do I wear a hockey mask?" He turned from the table and headed to the bag he had dropped at the door when he barged in. As he rummaged around, Donnie shot his brother a nod of thanks. He caught a look of anguish on Mikey's face, no doubt at the thought of not playing the game, but then he turned to look at the bag full of Donnie's things, and his face turned to glee before quickly going blank. Don caught it though, and his worry about his things came back.

Normally he would help April clear up, but he caught himself as Leo nudged Mikey. He remembered that Leo also helped out the woman, and seeing that Raph had forgotten, or didn't know, he did the same.

"Leo usually helps out after we eat." He whispered in clarification when Raph looked at him in confusion. He didn't get to talk further, as Casey and Leo called out to him. He headed over and took a controller from Leo, knowing that there was every chance that he was about to get his shell handed to him. The only consolation was that Leo would no doubt be as bad him, if not worse; as he hadn't seen Leo play the games that much since Master Splinter had made him leader of their family.

Half an hour later, Donnie resigned himself to failure after being thoroughly whipped by Casey and shockingly, Leo who sat to Casey's left and slightly behind him. With the windows to their left, he didn't have to worry about anyone seeing the missing chunk. He really must ask the older brother just how he had gotten so good. He sat back, with a Raph-like glare on his face and watched in joy as Leo played Mikey to the hilt. He honestly couldn't remember the last time he had seen their leader so carefree. It had to have been when they were kids.

Thinking of the youngest turtle, Donnie looked around hoping to spot the jokester. He found him, leaning against the arm of the couch, holding the palmtop he had spent the better part of several weeks on. It was in several pieces. He would have jumped up and attacked the normally Orange wearing turtle; Leo's training exercise be damned; only he saw that he was looking at each piece and seemed to be putting everything back together. Pulling Leo back against the couch to hide his shell, he stood and headed over, remembering at the last minute that Raph usually knocked pieces away from him, just to be annoying. He slightly toed a piece away that the other was reaching for, and was surprised when he growled at him.

"Raph, I needed that." He grumbled as he leaned forward to reclaim it. Donnie got Raph in that moment. His apparent moments of being annoying were his way of letting them know that he was watching them, that he cared, if in a weird way. Not being the eldest, youngest or smartest, Raph acted out to relieve his frustration. He hid his caring nature behind a wall of anger. Since the tribunal and Ultimate Shredder though, Donnie realised that he hadn't been so bad. Working out with Leo more often than not, Raph was learning to let his anger out in more productive ways and to not jump in before Leo's had a chance to sum up the situation.

Donnie sat on the back of the couch above him and watched as Mikey put it in it's proper place and secured it with the tiny screws. Donnie hadn't been able to get the GPS locator to sit just right so that the back slid on, but it seemed that Mikey had managed. Looking closely at it, he noticed that he had reconfigured the layout of several things, streamlining the pieces if making the whole thing slightly bigger. Not that he minded, their bigger that average fingers made handling some things tricky. He was just going to have to make a bigger back and screen.

He wondered what else Mikey was capable of. They all took him for a playful turtle, one who didn't always focus on what was happening around him, and when he did, turning some situations into games. He did focus on occasion, like when the Triceratons invaded a few years ago and he spoke about how the freed captives would cause enough confusion for them to use as cover. And with Touch and Go, both times. Actually, he could recall a few times when he had come up with a really good idea.

He went back to watching until April asked what they wanted for desert. They all answered at once, and as a result masked who was who, but he could see that their human friends were starting to get suspicious, they normally talked, shouted and carried on a lot more he realised. Oddly enough it was Raph, under the guise of Leo, that managed to get them some breathing room.

"Just get our usual. We're going to hit the rooftops for a few minutes. Work off some of that pizza."

"Yeah, Mikey needs to make some room. I think he ate half of it." Donnie said suddenly, knowing that it was just the situation that Raph would make such a taunt. He managed to get a grumble in his voice that time. "He needs to lose some weight."

"Hey!" Leo said, taking a swipe at him. "I'm still the Battle Nexus Champion you know."

"We know!" The rest of them called back, launching at him and sending them all out the window and up the fire escape. Mikey had managed to gather everything up and followed them. Donnie took a moment to think about how everything was doing in his bag, but a small nod from Mikey when he saw him, and he figured that it would be safe enough until things returned to normal. He had left the bag behind this time as they would soon be returning.

It was coming up on four hours since they had started this strange training session, but Don was starting to think it was more than that. There was more going on than them pretending to be another of their brothers. He was starting to think that Leo had chosen Raph, somehow despite closing their eyes, to wear Blue and take up Leo's role. Just as he thought that Mikey wasn't wearing Purple by accident. Until this was all over, he wouldn't be able to ask Leo about it.

He followed Raph as he leapt off of the building and onto the one next door. They quickly headed for a nearby rooftop that they knew had a lot of space, a few things for them to jump off of and had no one living in it. He barely had time to think before an Orange wearing turtle attacked him. He noticed Blue and Purple going at it before he had to focus on the one in front of him.

Leo was good with the nunckakus, but then again, he was good with all their weapons. As he pulled Raph's Sais, he remembered the other turtle tightening his belt so he wouldn't lose them. And in that moment, he got the reason for it. It was about trusting his brothers, trusting in not only their abilities, but his own. If the situation arose and they found themselves needing to use the other's weapons for more than just returning them to their owners, they would use them knowing that their owner would be glad to have helped to protect his brothers.

He fought as well as he could with the twin blades. He knew he was nowhere near as good as Raph with them, and it showed on Leo's face when he was able to get several hits in. He could see several training sessions in his future with not only the Sai, but all duel weapons. He jumped to avoid a swipe at his legs and managed to get a hit on the elder turtle's arm, remembering at the last minute to spin the Sai from a stab to a punch so as to not hurt his brother.

"Come on slowpoke," he suddenly found himself saying, "Even the egghead could have blocked that." And he knew that he would have if he had his own weapon.

"Yeah, well I am the Battle Nexus Champion. And I managed to beat you without drawing my Nunchuks."

"Bring that up one more time and see what happens." He pointed a Sai at him, finally managing to put a real growl into his voice.

Seeing the look of joy on Leo's face, Donnie kept up the furious pace. All the while, Leo kept up the annoying banter that made Mikey unique. Donnie got it then, as he caught sight of Raph taking down Mikey for the barest of moments. The banter was Mikey's way of gauging an opponent. Oft times, it made many attackers balk, enabling him to take them down, or do something predictable like charge at him. As he has had plenty of practice with Raph doing just that, he was able to counter it. Just as he has had plenty of practise against Leo who ignored it.

He managed to get a couple more hits on the leader before a sound that didn't match what his other brothers were doing caught his ear. Turning toward it, he saw someone he didn't think he would see again.

TMNT:TMNT:TMNT:TMNT SWAPSIES TMNT:TMNT:TMNT:TMNT

"Did you notice anything wrong with the turtles?" April asked Casey as they finished tidying up from dinner and the game.

"Like?" Casey returned, a look of confused understanding on his face, he had noticed something too.

"Well, they weren't talking, or should I say shouting, as much as they normally do." She thought for a moment then pushed a bang off her face and shook her head, allowing it to fall back.

"Raph looked a little pale, and didn't seem as strong. He didn't try too hard to get me off him." Casey said as he looking at the window they had all tumbled out of.

"Leo's voice was a little rougher than I'm used to hearing. And Donnie didn't answer when I asked what he was working on."

"Mikey wasn't jumping around like he usually does either. You think they're sick?"

"Raph said that Leo was coming down with something, but come to think of it, his voice didn't sound right either."

They looked at each other, looked out the window and back to each other. Each silently vowing to ask the brothers if everything was ok when they got back.