At the Shredder's base one night, down in the training hall. Shredder and his mutant henchmen sat/stood in a box seat. Karai stood in the training arena below before Shredder called down to her.
"Karai, show them in."
Karai nodded, as she pulled a lever, and a gate raised up. Stepping out from the dark and into the light were the Dazzlings who were wearing ninja garment just like Karai's.
Shredder got up from his seat and looked down at his three new minions, "Alright, you three. This is where you put your ninja skills to the test."
"Yes, Master Shredder." The three acknowledged.
Shredder motioned to Karai who nodded and pulled another lever. Another gate opened and walking out onto the arena were multiple Foot Bots.
"You will fight the Foot Bots until you have defeated them all. Do you understand?" The bladed ninja asked.
"Yes, Master." the three answered.
Bebop nudged Rocksteady, "Hey, Baby Ivan. What's say to a little bet? Five dollars if the Foot Bots win?"
"Shame on you, Comrade!" Rocksteady scolded him, "Betting is a bad-bad thing... Make it ten for I bet on Dazzling girls."
"You're on!" Bebop replied, as the two shook on it.
"Begin!" Karai announced.
The Dazzlings took off, as did the Foot Bots. The trio had put all their ninja training under the guidance of Karai. Adagio dodged a punch from one Foot Bot and delivered a spin kick sending it stumbling back. Aria ducked a kick from one of the Bots, before delivering a kick of her own to the one leg it was standing on making it fall. Sonata was dodging strikes from two Bots before grabbing one and used it as a shield when the other made a strike.
The Foot Bots extended their extra set of limbs that were equipped with blades. Sonata looked nervous, before Adagio spoke, "Girls, weapons!"
Sonata whipped out two Tonfa, Aria pulled out a Tribaton, Adagio unsheathed a Kusanagi sword.
"Remember what you've learned." Karai instructed.
The three nodded, and resumed fighting the Foot Bots. Adagio dashed around and used her Kusanagi to slice the robots up. Sonata was using her Tonfa to block the Foot Bots strikes before striking back as well. Aria used her Tribaton to swat the Foot Bots around before wrapping it around the head of one. She tugged the two ended pieces that crossed and off popped the robot's head.
Up in the box seat, Shredder and his mutants watched amusingly at the Dazzlings performance. The trio sliced, diced, and crushed all the Foot Bots leaving nothing but pieces of them littered on the arena floor.
The three Dazzlings stood side by side, before putting the weapons back and bowed their heads. Rahzar and Fishface applauded on their performance, while Rocksteady laughed as Bebop was forced to cough up his gambled money.
Shredder got up and jumped down onto the arena, landing before the three. The trio looked at Shredder and awaited his words.
"You three have done well," The Dazzlings looked up at Shredder with looks of joy, until he continued, "But your real test has yet to be done."
"We'll do whatever you ask of us, Master Shredder." Adagio promised.
"So what do you want us to do?" Sonata inquired.
"Go with Karai and seek out The Rainboom Girls. And bring them to me," Shredder instructed, "With them we can lure the turtles out of hiding. I trust you can do that?"
"Leave it to us, boss." Aria answered.
"Then get going." The Dazzlings nodded, as they left the arena with Karai.
Out in the city, the Rainbooms were coming out of the movie theater, with Rainbow Dash looking super excited.
"Wasn't that the coolest movie ever?!"
"It was pretty exciting." Sunset admitted.
"I thought it was scary." Fluttershy shivered.
"How would you know?" Rainbow asked, "You spent the half of the movie covering your eyes."
"But I could still hear it." the shy girl noted.
"Come on, y'all. We best get on back to the hotel for some shut eye." Applejack suggested. Everyone agreed and started walking back.
As they walked, Karai and the Dazzlings were watching from a rooftop, "There they are." Karai began.
"Those girls are gonna be in for such a surprise when they see what we can do now." Adagio said in a sinister tone.
"That's assuming this all works." Aria reminded her.
Adagio turned to her pessimistic partner, "We can't let the Shredder down. Either we do it or bust."
"And I don't want it to be bust." Sonata shook in fear.
"Keep it down. We want to make this ambush count." Karai silenced them.
As the girls continued walking down the empty street, Spike sniffed the air and growled, "Spike?" Twilight asked.
"We got trouble."
The girls were concerned, until dropping into the middle of the street was Karai, "Nice night we're having, isn't it?"
"Karai?" the girls gasped.
"Well, tonight just got interesting." Rainbow smirked, as the girls drew their weapons.
"You have no idea, Rainbow Dash." Karai replied smugly.
"You don't surprise us, Karai." Sunset warned her.
"Oh, I don't? Well, how's this for a surprise?"
Suddenly landing at Karai's side were the Dazzlings. Their appearances startled the Rainbooms who were lost at words.
"It's the Dazzlings!" Pinkie shrieked.
"Surprise, girls." Adagio said with a sinister grin.
"How've you guys been?" Sonata asked cheerfully, while her comrades eyed her.
"We've been better." Rarity replied.
"So you did follow us here." Twilight accused.
"Guilty." Adagio confessed.
"But you should learn not to speak so loud," Aria continued, "Otherwise someone might hear."
"Like we did. Sorry if that makes us stalkers. Personally, I don't like that." Sonata rambled.
"Sonata, focus!" Karai ordered, and Sonata got serious.
"What do you three want anyway?" Sunset demanded.
"We have orders from our master to bring you in." Adagio answered.
"Well, your master's gonna be disappointed in you three." Rainbow replied, as the girls drew their weapons.
"Don't bark before you bite." Karai retorted, as multiple Foot Bots dropped in.
"Well, this complicates things." Fluttershy said in worry.
"Keep your head high, Fluttershy. We can take them." Applejack said, as she got in a stance.
"Attack!" Karai ordered.
The Rainbooms took fight against Karai, the Dazzlings, and the Foot Bots. As Twilight was forced to fight Karai, Rainbow Dash took Aria, Pinkie against Sonata, and Sunset Shimmer against Adagio. The rest of the girls fought the Foot Bots.
As Sunset was blocking Adagio's hand to hand moves, she spoke, "Looks like you managed to find another means of fighting without using your voices." the girl snarked.
"Make no mistake, Sunset Shimmer. You'll be hearing our singing soon enough." Adagio warned her, as she knocked Sunset away, but the girl got back to her feet looking ready for more.
Rainbow was using her naginata against Aria using her tribaton, "You may have a weapon and ninja skills now. But you'll never be as awesome as I am!" Rianbow warned her, as the two fought.
Aria managed to wrap her tribaton around Rainbow's weapon and smirked, "You say 'awesome' too much," she tugged her wrapped tribaton and disarmed Rainbow Dash, "Especially since you're not as awesome as you say." Aria was about to attack again.
Applejack jumped in and delivered a kick to Aria. The cowgirl looked at her friend, "Are ya ok?"
"Never better." Rainbow replied, as she got her weapon back.
Pinkie fought with Sonata, as the clueless siren was using her tonfa to shield herself from Pinkie's strikes, "Wow, you're pretty good at this." Pinkie admitted.
"Thanks. You are too." Sonata replied.
"Pinkie/Sonata!" their respective sides called. The two looked sheepishly and continued to fight.
Meanwhile Karai was fighting Twilight, who was using all her ninja skills to keep up with her, "Not so tough without Leo and the others to back you up?" Karai mocked.
"We're not going down without a fight!" Twilight replied, as she fought back trying to match Karai.
The Foot Bots had just been demolished, while Twilight noticed her friends were getting tired and knew if this kept up they'd be toast.
"Girls, we need to fall back!" she called.
The girls quickly got to Twilight. Adagio called out, "Don't let them escape!" The Dazzlings and Karai went to attack only to be blinded by the smoke bomb Rainbow threw down allowing them to escape.
Adagio growled, "This is just great."
"How can it be great when they got away?" Sonata asked obliviously. Aria and Adagio face palmed at her idiocy.
"It's not over yet, girls," Karai lightened their spirits, "It's no question they went back to the turtles lair to recuperate. But they'll have to come back up top sooner or later."
"And they'll be bringing the turtles with them." Adagio realized.
"Precisely." Karai nodded.
"And how will we be able to fight both teams with just us and the Foot Bots?" Aria inquired.
"Maybe we should go back and get Rocksteady or Tiger Claw to help us?" Sonata suggested.
"Those guys won't be needed. I got something better in mind." Karai answered.
"Better than them?" Adagio asked.
"Yes. But first I need to get back and break out the last toy the Kraang made for Shredder. Wait here." Karai ordered, as she hurried back to Shredder's HQ.
"Wonder what she's getting?" Sonata asked.
"Whatever it is, it better be useful." Aria replied.
Adagio snickered, much to her friends confusion, "Adagio, are you ok?" Sonata asked.
"Oh, I'm better than ok, Sonata. I feel magnificent!" she said excitedly, "The excitement and thrill of fighting with my own bare hands! Why didn't we learn to do this before?"
"Do you really want an answer?" Aria asked rhetorically, while Adagio scowled at her killjoy partner.