I wrote this just in time. YAY!

I don't own TMNT. Just Koumori partly.

"So that's why Bishop believes we would be willing to give him April. That gun is the only way we have to get Mikey back," stated Leo. In response, Casey sighed and bit his lip. After their brief celebration, they were quickly brought back down to Earth when Master Splinter stated that even though Mikey was alive, he was still on another dimension.

Too bad all the Kraang portals disappeared when the turtles sent the Kraang packing. But then, we don't even know which dimension Mikey got sent to. So, we would have had to rely on the Inkheart gun no matter what. Casey, who was fingering his belt absentmindedly, then knew that there was only one course of action that had to be taken.

"Then, what we waiting for?" asked Casey as he took his hockey stick that was strapped to his back and swung it in front of him. "Let's invade the base and steal the gun." Because there is no way that we are not going to get Mikey back. But there is no way that we are sacrificing April…absolutely no way.

"Whoa Casey! We need a plan first!" exclaimed Leo as he put his hands up.

"I got us a plan Leo. Go to the base, beat up Bishop and his men till they are all black and blue, and then take the gun and used it on Koumori. Koumori will go home and we will get Mikey back," listed Raph fiercely as he whipped out his sai.

"We can't do that!" exclaimed April. Casey widen his eyes in surprise. April mourned for Mikey terribly too and she was extremely happy when we found that he was only in a different dimension. What's going on?

"What do you mean we can't do that?! Don't you want Mikey back?!" exclaimed Raph, almost yelling at the girl Casey liked.

"Hey, keep it down! Of course she wants him back!" intervened Casey as Donnie also intervened by placing a hand on Raph's shoulder. Casey then turned to April, a bit uneasy and wanting assurance. "Though…why did you say that?"

"Because we can't just fire the gun at Koumori!" answered April as she held the little boy close to her. "If we do, we will have no idea of knowing if he is safe with his parents or not! For all we know, we could be sending him to an area infested with volcanoes!"

"I am afraid April is right my son," said Master Splinter, suddenly very solemn. Wait, why is he so sad? So we have come across a problem since we don't want Koumori to melt in lava…Then Casey got it. As a result, he gasped and gripped his hockey stick tightly. If we end up sending Koumori to a very dangerous volcano ring of fire, or into any danger at all…that means Mikey was there…

Silence filled the air for a moment. When Casey looked at the turtles and April's fearful faces, he knew that they had come across the same realization as well. Casey bit his lip again. No…Mikey is still alive. He has to be…I don't want to go back to feeling that way again…I just can't…

"It's okay, I'm tougher than a volcano," said Koumori, the only one in the group who wasn't solemn or fearful at all. Koumori had his fists up like he was going to fight the hypothetical volcano and his dark brown eyes were full of self-confidence. Casey couldn't help but feel a bit envious. He's lucky…he's too young to understand that the world can be really cruel yet…

"Koumori…I'm afraid…that isn't the only problem," said April in a really gentle tone.

"What other problems are there?" asked Koumori like he believed there really shouldn't be any other problems.

"Well… if there is the possibility that Mikey could…could be in a dangerous situation right now, then it is also possible that you didn't trade places with him, like we believed," informed Leo, if not a bit painfully.

"Wait…are you saying that Koumori might not be from another world after all?!" exclaimed Casey, who felt despair trying to break into his heart. "That if we capture the gun and used it on Koumori, that he will actually just leave his home-world and an alien that we don't know will take his place?! Instead of Mikey?!" Leo just closed his eyes and nodded.

"But...everything just lines up! I found Koumori the night Mikey disappeared, retro-mutagen doesn't work on him…" protested April as she put Koumori down on the ground.

"And yet it could all be just coincidence," interrupted Master Splinter firmly but without gently. "And we all aware that the retro-mutagen didn't cure my daughter from being a mutant."

"Why would you want her to stop being a mutant?!" exclaimed Koumori, sounding very alarmed. "Being able to transform is awesome!" Koumori…

"Because she wasn't always able to transform," April explained. "She used to be just a normal human girl. Then she fell into some mutagen, the green ooze I told you about, and it change her into…a big snake. And even though she does have the ability to transform back into a girl, she is slowly…forgetting who she is because she is still a mutant."

"You mean…she wasn't born with the talent of turning into a snake? And that's what makes her mutant?" asked Koumori. Bingo.

"Yes," confirmed April with a nod.

"Oops, then I think I lied," admitted Koumori.

"What do you mean, you think you lied?" asked Raph, anger lacing his words as he narrowed his green eyes at the kid. Uh oh…Then, before Casey could do anything to calm Raph down before he let it loose, Koumori explained himself.

"Because I was born a bat. And I could always change into any form. I just have to bite somebody from that form. And I got my gift from Papa and Mama." For what seemed like forever, no one spoke because of shock and bewilderment.

"What?" Leo finally asked, sounding like he was still shocked and bewildered.

"Here, I show you," said Koumori. Without any warning, Koumori went up to Leo and bit his index finger.

"Ow!" exclaimed Leo as he on instinct pulled his finger away from the boy.

"Koumori!" cried April in her discipline voice as Donnie immediately went to Leo and inspected the bite.

"What the heck?!" Casey cried, unable to believe his eyes as Koumori just calmly closed his eyes like he was going to concentrate.

"Wha…" Raph said angrily. Casey knew he would have said or yelled more if one of the most astonishing things to ever happen in Casey's life, perhaps in all of their lives, happened.

At one moment, Koumori was just a regular oriental four-year-old human boy. Then before Casey could even blink, Koumori was suddenly not a human anymore. He was a small mutant turtle boy with dark green skin and a flawless shell and plastron. His unmasked face was full of freckles and when he opened his eyes, Casey saw that they were still a dark brown.

"See? I can take any form I want," said Koumori proudly. "I always could, and I always will." That's when everything finally sunk in. Koumori…really is an alien. And…he can transform into anything…as long as he sucks some blood…

"Koumori's a vampire!" Casey nearly screamed as he lifted his hockey stick into the defensive position.

"Vampires exist?!" Raph cried as he took a few steps backward, sai still in his hands. "This is just too freaky!"

"Guys, calm down!" exclaimed April angrily as she rushed towards Koumori and stood in front of him, like she was protecting him from Casey and everyone-else. "Koumori is not a vampire! Vampires don't transform into mutant turtles!"

"Calm down? Calm down?! April, he just suck my blood from my finger!" cried Leo as showed off the very same finger. "In whatever way you look at it, Koumori's ability is just creepy!"

"I know," stated Koumori cheerfully, like nobody was freaking out or Donnie was just staring at him with a gaping mouth. "Everyone thinks so when they first find out. Even if they are too chicken to say it."

"See?! He admits it!" Casey exclaimed to April as he pointed at the little boy.

"That is enough!" Immediately at the sound of their sensei's voice, everyone shut their mouths up and look sheepishly at Master Splinter. While Master Splinter was not furious, it was obvious just by looking at his face that his patience was completely gone. Which meant that he was not to be trifle with at the moment.

"Look," Master Splinter continued with sighed. "I know that we all have been through a lot tonight, and that Koumori…breaking Leo's private bubble might have been a last straw, but that is no reason to yell and call him a vampire." Private bubble? That's putting it lightly…

"I'm sorry Sensei," Leo immediately said as he bowed to his Father. Then he bowed to Koumori. "I'm sorry if I hurt you Koumori."

"I wasn't hurt Leo. And I'm sorry that I scared you," forgave Koumori. "Even though you guys' reactions were funny."

"Oh my gosh. This kid is a friggin sadist," Raph muttered. Casey risked a snide glance at Master Splinter, who luckily hadn't heard Raph. Or if he did, he's not going to comment on it.

"I just wish that guy who wore…who wore…oh, the sunglasses at nighttime along with a black coat got scared too when I bit him," added Koumori. Wait…a man with a black coat and wears sunglasses at nighttime? He can't mean…

"Bishop," Raph said softly, stunned. Then Leo quickly kneeled down so that he was face to face with now mutant turtle.

"When did you meet this guy?" Leo asked, his voice calm yet edged with hope.

"On the night I came here," Koumori answered. "One minute I was eating an apple over the river, and the next minute, this leader and his men were chasing me! I didn't even have time to ask what was wrong with you guys or ask you for help."

"You…you saw us that night?" asked Leo, sounding and looking completely stunned. He looked up and share a stunned and pained look with his brothers. Koumori…was there when Mikey disappeared…

"Uh-huh," confirmed Koumori. "And even though I was flying very very fast, he still kidnapped me! So I bit him and escaped. Then later, I changed into a human because I drank his blood." When Koumori was done telling his story, Casey looked at the others. What he saw mirrored what he was feeling at that moment.

There was absolutely no doubt anymore. Koumori was an alien. And he was the one who had exchanged places with their Mikey. Even though the possibility that Koumori wasn't the alien that traded places with Mikey was now gone, Casey didn't feel totally relieved.

Mikey could still be…in trouble and if we exchanged him with Koumori, Koumori could be the one in trouble. And even though he has a bit of a creepy ability, he ain't a bad kid. I don't want him to be in danger. But he is in danger here because of Bishop and besides, I want Mikey back. So what do we do?

TMNT

Leo splashed water on his face, like that would relieve him of the problems weighing on his mind. After Koumori proved that he was indeed the alien that traded places with his baby brother, April pointed out that Bishop since once tried to capture Koumori, he will tried to do so again.

This valid point made everyone even more nervous. As a result, Master Splinter wisely stated Koumori will probably be safe as long as he is in his human form. When this calmed them somewhat, Master Splinter told Leo and his brothers to go to bed and told April, Casey, and Koumori to go home. When Raph started to protest, their Sensei just firmly told him that it was really late and that they couldn't solve anything tonight. So with that, the turtles started to get ready for bed and April and Casey, along with a now human Koumori, went to the topside.

Leo looked at his reflection in the mirror and sighed. While he knew that his Father was right, the eldest turtle doubted that he could sleep tonight. There were just too many questions and anxieties running through his brain.

Why does Bishop want April? Why does he want Koumori? Why would he request for April when he could have requested for us to give him Koumori? Is it because he knows we will not be able to get Mikey back if we give him Koumori? So is he willing to give up 'studying' Koumori and the gun so that he could 'study' April instead? If he wanted to get knowledge on alien worlds, why use the gun on Mikey, and not one of his men? Was Mikey just…just a test subject or something?! And if we do manage get the gun without anyone else dying or getting captured, how do we get Mikey back without worrying for Koumori's safety? Will we actually get Mikey back?

At that last thought, Leo roughly shut off the faucet, stopping the flow of water from the spigot. No! Mikey is alive! He isn't in danger of dying, and we will get him back, safe and sound! We will get him back! We will get our baby brother back, and get Koumori safely back to his home in the process! Everybody will be happy again, and Donnie will speak again! We have to succeed! We absolutely have to…

That's when Leo's phone rang. Surprised and wondering who will call him this late at night, Leo took his t-phone off his belt and saw the picture i.d. on the screen.

"Casey? What does he want?" muttered Leo as he accepted the call. "Casey, wha…"

"Leo!" cried a frantic Casey. "We're under attack!"

Uh oh...this ain't good. At all. What will happen next?! Read the next chapter to find out! Which may or may not on Friday or Saturday, depending on much people want the next chapter. So till then, please review and have a good night/day!