Author's Note:
This is a rewrite of the 2014 Teenage Mutant Ninja Turtles movie with OC inserts. I did this mostly for myself, so if you don't want to read it, that's fine. I realize it's not the most creative thing to do, rewriting a pre-existing movie, but it still took time. An entire year in fact. And it's similar to using a base to draw or filling in a colouring book. So please don't leave any comments saying how this is lazy or anything. It was strictly for fun. Thank you.

...

The brothers returned home safely, but still had a problem they needed to face. Their father had been severely wounded when the Shredder had set off the explosions in their home. Donnie had managed to salvage some of the mutagen that Shredder had with him when he fell, after the canister broke and its contents oozed into the sewers.

Donnie gave commentary as he tended to his Master's health, "okay, the mutagen is now entering his bloodstream."

"Master Splinter?" Mikey asked cautiously, worry hinting in his words.

"Nothing's happening," Raph stated flatly. His face was blank but his eyes betrayed him, showing the true fear he felt.

"Why isn't it working yet?" Mikey asked, sounding more irritated and impatient. Their Master began to stir, breathing in bursts while he struggled to get air into his lungs.

"Mike…" he began, sounding weak. "Mikey, come closer." Mikey obeyed, leaning in so his father could whisper to him.

"What'd he say? What'd he say?" Leo asked quickly when Mikey rose again.

"He said please get your knee off my chest," Mikey told him. The boys instantly relaxed, relieved that their father would recover. "Sensei! You're alive!" Mikey cheered.

"It worked!" Raph stated with glee.

"I'm sorry," Leo spoke before his brothers turned to him. They knew their brother well, and knew he blamed himself for their father's condition. "This was all my fault."

"You were right," Raph told their father after turning back to face him. "We weren't ready."

"No," Splinter breathed. "It was I who wasn't ready … to let you go. All you needed was to discover that your true power lies in believing in one another." The brothers paused, absorbing the information their sensei had released to them, before turning to smile at each other. Mikey was a little slower than the others in coming to the same realization, but when he did, his eyes lit up and his smile grew. He placed his fingertips against his temples and made a "mind blown" gesture, accompanied by an explosion noise.

...

It was the middle of the night and the moon was shining bright in the sky, although not as bright as the city. Vern sat against the hood of his new car in an empty underpass. His right arm was in a sling thanks to his earlier bullet wound. He was waiting to meet with April, and he finally saw her approaching, walking her bike beside her. "There she is; New York's secret weapon," he said. She smiled at the comment.

"How's your arm, Vern?" she asked, glancing at his sling.

He lowered his head to look at it as well, and then right back up at April, "well, it wouldn't be much use in a fight. Not that I was much use before, but …" He shrugged. April knew he wasn't trying to put himself down or make it sound like he thought he was completely useless, just that he wasn't the best in a physical confrontation. She considered telling him how much she appreciated what he does for her, but wasn't sure how to put it without making the conversation weird, so she opted to change the subject instead.

"Did you get a new car?" she asked.

"Yeah," he answered. "You're lookin' at the new Fenwick express." He rested his hand on the hood, trying to look as cool as he could with a busted up arm. "Pretty sweet, huh? Kind of an upgrade. Figured I'd need new wheels after my old work vehicle went boom. Yeah, channel 6 gave it to me. They said don't put a scratch on it, but, like, lightning's gonna strike twice."

"So, is that why you called me here? To talk about your new car?" April laughed nervously.

"I know you're not exactly a fancy restaurant kind of girl, so I figured a creepy underpass in an abandoned neighbourhood in the middle of the night was more your speed. Wanted you to be comfortable." April didn't hear his last sentence. She had gotten distracted by an approaching vehicle, and with everything that had happened in the past few days, unknown vehicles made her even more uneasy than usual. Vern saw she was looking past him, and turned to see what it was just in time to hear a friendly 6-note car honk. April relaxed immediately when she recognized who it was. The turtle brothers pulled up in a tricked out van; the same van that had once belonged to Vern. Mikey opened the side door and leaned out, dramatically waving his arms above his head while mimicking vinyl scratch noises.

"DJ Mikey in the house!" he half sung.

"What are you guys doing here?" April asked, walking towards their vehicle with a huge smile on her face.

"We figured we owed you a thanks," Leo told her, leaning out the passenger side window. "For keeping out secret." She walked around the side and peered in through Mikey's door to see Raph.

"I know you got a lot to gain by telling people about us," he said with a small smile. "But you got our backs."

"Yeah, 'cause that's what family's for, Raph," she replied. Raph gave a small laugh, turning his head away for a short moment, and then returned April's gaze with a smile.

"Sweet ride!" Kaitlyn called running up from the same entrance April had taken. She pushed past Vern to check out the turtles' new van. She looked in and saw Raph, giving him a smile. He looked shocked to see her at first, but quickly returned her smile.

"Hang on. How did you find us?" April demanded, pulling her close by her vest hood.

"I overheard you talking on the phone and followed you here. Thought the turtles might show," Kaitlyn replied honestly. "You guys took off so quick after the fight, I never got a chance to really meet you. I don't even know all your names. I know Raph and Don." She pointed at the red and purple banded turtles before giving Leo and Mikey hopeful looks.

"I'm Leonardo," he released to her, giving a small bow with his head.

"And I'm Mikey," he told her, sweeping his arm over his stomach and giving an exaggerated bow. "And your name?"

"Kaitlyn Grimm, but everyone calls me Kitkat."

"Kitkat? Like the chocolate bar? That's awesome," Mikey said excitedly, giving her a big grin. She laughed at that, enjoying his enthusiasm at the nickname her Uncle had given her years ago.

"I'd like to know about your abilities," Donnie chimed in, eyes wide with excitement. "When did you get them? How did you get them? And what exactly can you do?"

"Super strength, intangibility and telekinesis," Kaitlyn told him.

"Super strength, huh?" Raph repeated with a smirk. "That explains how you knocked me flat on my shell when you punched me."

Kaitlyn gave him an awkwardly apologetic smile, "Yeah, sorry about that. Reflexes." She gave a shrug, bringing her hands up in a what-can-you-do motion.

"Wait, you punched him?" Mikey asked, sticking a thumb in his brother's direction. "When did that happen? And why did I miss it?"

"Never mind that, Mikey. That's not what's important," Donnie cut in, waving his hand at his brother dismissively before turning back to Kaitlyn. "Please. Continue about your abilities."

Kaitlyn nodded gently, "Well, it really started when my mother was pregnant. She was subjected to inhuman experiments; experiments that eventually killed her when I was four." The turtles' faces dropped in sadness, sorry to hear that she had no mother. She continued, "The experiments mutated my DNA somehow and resulted in super powers, but I only developed them a couple years ago."

"Facinating," Donnie marvelled.

"Wait," Mikey spoke, holding out his hands dramatically. "You're a mutant too? That's awesome! Cooler than awesome!" He raised his hands to the sky as he made his exclaimation. "High three! … Ooooh, right." He stretched his hand to her before remembering that he and his brothers were the only ones with three fingers. He withdrew his hand slightly, choosing to abort his intentions. Kaitlyn just smiled understandingly.

"How about, gimme some green," she suggested, holding up her hand. Mikey beamed and smacked his hand against hers.

"So, hang on. You guys are driving now?" Vern asked, changing the subject and looking slightly uncomfortable with that discovery.

"Yeah, man. I pimped this bad boy out," Donnie told Vern, missing his uneasiness. He sat in the driver's side and had his arm casually draped over the back of his seat as he began pointing to various features he'd installed. "Got a 42 inch plasma, with the NBA package, shave ice machine, 7.1 digital surround sound."

"Check the bass, brah," Mikey chimed in. He turned quickly, pressing a couple buttons, and then returning just as fast to smile at April as he waited for the music to play. Instead of a sweet melody, however, a rocket launcher came up from the van's roof. Mikey didn't even notice.

"Uh oh," Vern spoke, before Mikey looked over to see what the problem was. The rocket launched straight into Vern's new car. He, April and Kaitlyn shielded their eyes from the bright explosion that tossed the vehicle onto its back. April made an awkward face, knowing that Vern would not handle this well. At first he said nothing, just staring in shock at the damage.

"My bad," Mikey broke in. "I'm still figuring out the buttons." Kaitlyn pushed her lips together, trying hard to hold in the snickers that were tickling her throat.

"That was my new Fenwick express," Vern told him, clearly displeased. "I just." He flinched, reaching for his shoulder when the sudden move made it shudder with pain. "I just got that."

"We better get outta here," Leo announced as sirens began to echo in the distance, no doubt where they were headed. "Want a ride home?"

"I'll take one," Kaitlyn said quickly, holding a finger in the air before jumping into the van beside Raph.

"Yeah, I'm down with that," Mikey approved before adding in a whisper, "I wanna hear more about when you punched Raph."

"Mikey," Raph growled, warning him not to pry. Mikey looked back to April and Vern, still waiting for their reply.

April looked to Leo, then Vern, patting him on his good shoulder, and back to Leo again, "You know what, I think we're gonna take the subway." With Donnie's limited driving experience and Mikey's little knowledge of button activity in the van, Vern and April weren't sure how safe a ride home from them would be.

"You sure?" Mikey asked. "I got a real nice song that's all queued up. It's special, girl. For us."

"No," Raph protested calmly. "Don't do it." The rest of Mikey's brothers joined in, begging their youngest sibling not to do what he was about to.

"It's happening!" Mikey reached down, hitting the correct button this time, and began singing along to Happy Together to April. She smiled at the cute scene; Mikey's attempt at singing, his three brothers begging him to stop, and finally pulling him into the van and driving away. But Mikey wasn't finished. He burst out the back doors, Raph holding onto him so he wouldn't fly completely out, and continued to sing at a louder volume.

"I swear, I'm gonna hit him," Raph barked as the van continued to drive off into the night with the orange banded turtle hanging out the back, singing at the top of his lungs, and Kaitlyn laughing hysterically.