TMNT x Spy Girls (Equestria Girls OCs) Crossover

A few hours later, Diamond comes out from training, the Riddle kids goes in the dojo to train, Diamond goes to see what the others were doing, the Hidden Teenagery except 4-Power, and Electric Gamer, were on the couches on their phones, Heart, Musical, and Casey were playing the pinball machine, The turtles were watching TV, and Sweet, 4-Power, and Electric Gamer were in Donnie's lab doing some potions.

April, Poppy and Blitz are on the surface. Jord and Jace are in the kitchen private chatting. For Lynn, she kept an eye out. And Tore, somewhere deep in the sewers, further from the Lair. Diamond felt like she needs some more time alone, so she left more into the deep parts in the sewers without them noticing.

A few more hours later, everyone noticed Diamond was gone.

"Wait, where did Diamond go?" Zack asked, as he comes out of the dojo, with sweat.

"I dunno, Lightning and I heard a bit of it, then moved on" said Rainbow.

"You don't think she went up to the surface again, do you?" asked Heart.

"Nah, remember last time, she did that, she got captured. I don't think she would try that again." said Rainbow.

"I think I know, there isn't just THIS part the only sewers? Besides, I believe the Turtles know about this" said Lynn.

"That is true. I'll go look for her." said Leo.

"I'll go with you, Leo." said Rainbow.

"So am I." said Raph.

"Fine by me, come on." said Leo.

Leo, Raph and Rainbow goes deep in the sewers to find Diamond.

As soon as she got far enough from the lair, she sat by the edge and looks at her reflection.

"*sighs*... maybe Splinter's right... maybe I should trust my instincts... less i'm wrong about Karai." said Diamond.

Leo, Raph, and Rainbow came in and sees that they found her.

"Uh..Diamond?" said Rainbow.

Diamond was shocked a little and looks at them.

"Guys.. what are doing here?" asked Diamond.

"We've been looking for you." said Rainbow.

"Yeah we haven't seen you since you went to the dojo." said Raph

"And... well... you haven't been yourself recently, is there something wrong?" asked Leo.

"I.. rather not talk about it." said Diamond.

Leo, Raph, and Rainbow looks at each other.

"Does it have to do with Karai?" asked Rainbow.

"H-How did you know that?" asked Diamond kind of shockingly.

"Me and Lightning kind of... well... couldn't help but overheard your little conversation with Splinter." Rainbow revealed.

"What?" asked Diamond.

"Sorry, Diamond, but me and Lightning couldn't help it, you weren't yourself recently. As soon as we got home, you went to the dojo to talk to Splinter about something, I had a feeling it has something to do with Karai." Rainbow explained.

Diamond just sighs.

"You... didn't got out on your own, did you?" asked Leo.

"... No... If I tell you three this, would you promise not to freak out?" asked Diamond.

"Diamond, you can tell us anything." said Leo.

"Whatever it is, we won't freak out on you." said Rainbow.

"Yeah, come on, we're your friends, you can't trust us, can't ya?" asked Raph.

Diamond thought about for a bit before telling the truth.

"*sighs* Ok... the truth is... Karai was the one who help me to get me out of Shredder's lair before Jade had a chance to torture me for telling her where the lair is. We went to Coney Island when we got out, as soon as we got there... she told me about betraying Shredder's honor. Tiger Claw and Jade wanted to use Karai to set a trap for Leo and his bros. But she said she can't... even if it means, betraying Shredder. I... I have a feeling that Karai is wanting to fight for good instead of fighting for evil." Diamond explained.

"What?" asked Leo.

"Karai... actually... talked to you... instead of fighting you?" asked Rainbow.

"I know it might've sound crazy, but.. It's true." said Diamond.

"I don't believe what I'm hearing. That you actually think that Karai could be on the good side." said Raph a little furiously.

"Raph, you don't understand." said Diamond.

"What is it that I don't understand, huh?" asked Raph furiously.

"Splinter told me about his past, before Karai was taking away by Shredder." said Diamond.

"And why does that matter to us?" asked Raph.

"*sighs* Because Karai... is actually... Splinter's true daughter." Diamond revealed.

Raph and Rainbow were shocked, but not Leo cause' he already knew.

"I knew it." said Rainbow.

What they didn't knew, that Tore was down here since this morning.

"I should've know those months ago." said Tore as he revealed himself.

"What are you doing down here, Tore?" Raph asked, irritated.

"Doesn't matter, I heard Leo said that Karai is Splinter's true daughter, it's true. I have seen proof from Leo himself." said Tore.

"Should I even expose, some facts that you guys have hidden?" Tore asked.

Rainbow, Raph, Diamond, and Leo looked at each other, then back at Tore.

"Not sure if you want to do that." said Rainbow

"We could keep it to ourselves until we're confident enough to let it out" said Diamond.

"Might as well to explain some to other dimensional characters" said Tore as he gets out his phone.

" Dimensional? I don't get it." said Raph, annoyed.

"You girls, I and the bands, are dimensional, so are the Riddle kids.Who else do you think we know dimensional?" Tore asked.

"FNAF, Undertale. From what they told us." said Diamond.

"We've been through more than.. Just that, I was down here talking to Harold Hutchkins and George Beard. I've sent text to Cuphead and Mugman, and challenged Bendy." Tore revealed.

"We should head up to the lair, now" said Rainbow.

"Let's go." said Leo.

They walked back to the lair, in just a few minutes, they were back.

"Where have you.. 5 been?" said Theorist looking back from the sofa.

"Diamond has been deep into the sewers, Tore was too, talking to some dimensional characters you met your way, we've managed to find Diamond, then Tore found us explaining and revealing places you have been through" said Leo.

"We've been wondering..." Jord paused.

"If there are any other mutants than just you turtles?" Jace ended, as they walked out of the kitchen.

"Since when did you know?" said Mikey, looking at Jace and Jord.

"Honestly, what do you think? They are detectives you know." said Phred, was standing outside the dojo.

"Right..." said Mikey.

"Go ahead! At least they are on our side." said Ying.

"Let me start off, Tore, do you know anything about Slash or Spike in this matter?" said Raph, looking at Tore.

"As a matter of fact, I did, your pet turtle that got mutated and known as Slash, working with the Mighty Mutanimals." Tore answered. The bands, and the Riddle kids, were shocked.

"If you know him, how about other members?" Heart asked.

"Let's see, Leo at least told me this: Slash is the leader, Leatherhead, an alligator, 2nd in command, Rockwell, the brains as in having telekenesis, as a human, Tyler. Pigeon Pete as a spy. As for Mondo Gecko, a skateboarder, I know, not a topic for fighting, he is capable of speed though." Tore explained.

"Anything else?" Musical asked.

"All what Leo told me, no" Tore answered.

"You've met them, haven't you?" Casey asked.

"Not in person, which is a bit weird honestly, but they do know me as well." Tore answered.

"So, these Mighty Mutanimals your speaking of, I kinda saw 2 of them outside fighting those... robots, the Kraang, while we were coming to the sewers" said Phil as he comes out of the dojo with Smiley.

"Heck, should we meet them now?" Lightning asks.

"We must not disturb them, according to my status, they just fought Jade and Tiger Claw, and Karai was... helping the Mighty Mutanimals." Donnie said, coming from his lab.

"Right, we should wait till tomorrow, and when Leo prepares the meeting, I assume the Mighty Mutanimals would know. But for now, we should get some rest" said Clora.