Spoilers from included and/or represented works abound. Please read this fiction carefully.
2v1 battle, Mipuyo uses Puyo and Renegade Ringo uses Tetris. Regime!Akuma uses Fusion set and starts the battle.
"Mix Chain!"/"ミックスれんさ!" So Regime!Akuma can overwhelm both. "Tetris Plus!!!"/"テトリスプラス!!!" *for clearing 5 lines at once clearing*
It didn't last, because Renegade and Mip are just so much better at Puyo and for Ringo, Tetris. Akuma isn't too experienced at Tetris, let alone such Fusion, and is defeated to the bunch.
The rest of the group got up, and the whole group went to the briefcase. However, as they opened it, they found out that the weapon was heavily damaged, partly from the electricity spreaded, partly through some Fever, and partly through the earthquake.
"Damn..." Renegade Ringo is disappointed.
"Can it be fixed?" Marin asked.
"The magic cap's intact, but the optical resonator is beyond repair." Renegade Ringo replied. "Even with the Agency, we don't have the resources to rebuild it quickly."
"Looks like we're gonna need some help." Shou concluded.
Meanwhile, in a massive satellite originating from Spacetime Detective Agency...
"Ready to test it?" Regime!Witch, both as a witch and a engineer nowadays.
"Ready." Demonic Sig in front of the antenna, Spacetime Static Stylus. "System's online. I'm linked up."
"Sig, you ready?" Regime!Witch asked.
"Yeah." Cue Demonic Sig charging the antenna with his demonic power.
"Alright!"/"ちょっと、おいッス!" Regime!Witch setup and tunes in. "Let's crank it up!"
Demonic Sig unleashes his demonic power, powering the antenna.
"The platform should lock on to their signatures and pull them back." Regime!Witch explained.
"Got it! I just need to resonate at the right frequency!" So Demonic Sig tunes in, vibrating to match the frequency.
Suddenly, a light field fired up near the main antenna and besides the rest of the system.
"How we doing?" Demonic Sig asked.
"Containment field's up, but the levels are spiking!" Regime!Arle warned.
The field violently pulsed, trying to overwhelm the three.
"Witch, shut it down!" Regime!Arle commanded.
"It's okay, I've got it!" Regime!Witch assured.
The field then exploded, blasting the three. Regime!Witch is transported into somewhere else.
"Wow. Dunno whether to put myself out with magic or kick myself in the-" Regime!Witch is surprised.
"Get ready, or else the leader will erase us all."
"Those reckless, undisciplined brats!"
"The chaos ensuing is useful."
"We needs more than pawns if we're going to conquer those realities."
"That's all I need to hear." Regime!Witch then barged in.
It was the Evil Omni-King Archon and some Zamasu (Fused form, but apparently Infinite), and Regime!Witch just spells on, catching them off guard.
"A mortal dare to interfere us!?" Zamasu is frustrated.
"Just keep her busy!" Archon ran away for now.
"With please." Zamasu sadistically confronts Regime!Witch.
Regime!Witch blasts Puyo-activated spells onto the immortal paradox, even when he's Saiya-nic and just freaking powerful. He spent most of the battle fending off Garbage Puyos than actually killing blows against Regime!Witch: she's just as good, if not better, as Puyo and magic than the main counterpart which he was studying about.
"Pleasure's all mine, stranger! Big Bang!" Regime!Witch knocks the Zamasu that explodes, defeating him. "Wish the my old friends could see this."
"What do you think, Puyo-Witch?" A corrupted Gunnar approached Regime!Witch, mistaking her for th main counterpart. "Like yours, only technological."
"It's the witchcraft, not just magic." Regime!Witch replied.
The following battle went similarly to against Zamasu, only a bit quicker. Gunnar is forced by the Garbage Puyos, and the Regime!Witch beat him by her spells, and finished off with "Big Bang!".
"Wardrobe malfunction, I suppose." Regime!Witch mocked Gunnar.
"At ease, witchy!" Renegade Ringo appeared alongside the group she sent.
"Ringo?" Regime!Witch noticed. "And those..."
"Welcome to Neo Oz, sorceress." Daichi greeted. "I'm Daichi."/"ダイチ"
"Oh, alright." Regime!Witch seems friendly to Renegade Ringo right now. "What did I miss?"
"It's a long story." Renegade Ringo replied.
Back in the bunker...
"She took a big chance coming back here." Regime!Serilly sighed. "Why?"
Traces of White Wishing Puyo suddenly causes Regime!Arle to be fuzzy as she's investigating. She feels her power is being forcefully neutralized and brutally countered.
"I have to flush them out. Now." Regime!Arle commanded.
1:22 A.M., day 15, at this timeline's Ando Family Fresh Produce...
"Alright." Regime!Witch decided to. "Let's rev up the transport, fix the laser in our dimension."
"And come back with reinforcement." Ringo, no longer possessed by Ecolo.
"I'm sure we-" Ecolo spoke up-
"There's no time." Renegade Ringo then showed with a monitor.
-*monitor shows this timeline's Arle Nadja, the one in regime*
"Over a week ago a tragic event cost the lives of hundred plus four." Regime!Arle from the monitor. "Overwhelmed by guilt for the part she played in the madness, she was driven mad."
"She became an agent of chaos, an enemy of peace, joy and security." Regime!Arle announced. "But no longer. The leader of the resistance, the Insurgency, will pay for their crimes."
"Oh I don't like this." Ringo is disappointed. "That, to the point of even your Amitie betrayed her just to be safe..."
"At 6:00 P.M. local time, Sig will be executed at Pwurp Island." Regime!Arle continued. "May Lilith have mercy on her soul."
"Getting help? Not yet." Renegade Ringo shuts the monitor off. "Rescuing your Sig just became our priority."
"It's a trap." Count Roquier refuted.
"Of course it is." Renegade Ringo conceded. "Be sneaky."
"Sneaky how?" Marin questioned.
"The teleporter." Renegade Ringo replied. "Pwurp's is now equipped with teleportation dampeners."
"But they only cover the buildings." Regime!Witch noted. "Y'just have to get Ringo outside."
"Straight through a brick wall?" Daichi heard it. "I'm in!"
"You'll need a diversion." Renegade Klug also happened to be gathered here. "To keep Arle occupied."
"Leave that to me." Count Roquier suggested.
"I'll take the teleporter. I'm the most qualified to work it." Regime!Witch suggested. "And, I can infiltrate their ranks."
"I'm with you." Renegade Klug suggested.
"The only way to access the Intral City is the HQ." Count Roquier revealed. "And if your cover's blown, you'll need someone shadowing you."
"I'm not asking permission." Renegade Klug shrugs.
"But you'll follow my lead." Regime!Witch declared.
Intral City. Regime!Witch, way more tech-savvy than her counterpart, accompanied Renegade Klug and both went into a communication room.
"Communications should be over there." Regime!Witch pointed out. "Re-route them like we talked about, and I'll get the teleporter access codes. After you're done, make sure you-"
"Yeah yeah, go figure." Renegade Klug replied.
"Stick to the plan." Regime!Witch warned. "Meet the teleporter in fifteen."
Regime! Witch finished coding, and went to a teleporter for test. "Not now..."
"Hey, other." It's the Dark Witch, the evil counterpart of Witch which Regime!Witch is also a counterpart of.
"Hey."/"おいッス" Regime!Witch called.
"You bored?" Dark Witch asked.
"Uh... no... Fine." Regime!Witch refused.
"We still on for a match?" Dark Witch asked.
"Sorry. Gotta cancel." Regime!Witch refused. "I'm busy."
"Since when has that stopped you?" Dark Witch gets snarky.
"Ummm..." Regime!Witch is nervous.
"You're one of them." Cue the Dark Witch knocking her original's counterpart away with magic. "Let's see if I can destroy you with your own power."
"WARNING! A hostile comet summoner is approaching fast" A magical fight chasing with comets raining. "READY"
"GO!" Cue the chase and counters. It's been quite a long time since both comet summoners faced each other, except they're not from the same timeline.
Regime!Witch is familiar with that, and she knew how to deal with her.
"Well... I'm still magical." She wins.
Suddenly, Regime!Witch loses her magic. This confused the magic engineer, and then...
"Ummm, well... I think some doppelganger would laugh." Witch came in. "Well, there's my duplicate. C'mon!"
"What? Me..." Regime!Witch noticed.
"Don't mind me." Witch tampers her counterpart. "Just manipulating your magic."
"How about I return the favor?" Regime!Witch got her magic back, and did 'manipulate' her counterpart's.
Messing each other, leading to both stunning reach other.
"For real. Like magic." Regime!Witch responded.
"Fine. Puyo battle!" Witch engaged.
This became a perfectly-even match for the most part. However, Regime!Witch tried to get around with tech to manipulate the chaining power. However...
"Big Bang!"
"Aaah!"/"びょえー!?" For her distraction and unnecessary fiddling, Regime!Witch got exactly 30 Garbage Puyos.
Realizing what just happened and it's Fever duel, Regime!Witch clears her sense and proceeded to Fever thanks to a big Puyo. Chains for 30 seconds, she nailed it: the main Witch gets the Garbage for teaching her counterpart to not chest mid-game at all, and the Regime won out.
"What happened...?"/"いててだよ〜..." Witch is defeated.
"Bursted..." Regime!Witch is disappointed. "Definitely not a good look for me."
"You beat me to her." Renegade Klug came in. "This one."
And so, Regime!Witch and Renegade took full control of the Intral City teleporter.
"That's it! Got control of the Intral City teleporter!" Regime!Witch reported.
"It can't be that easy..." Renegade Klug, natch.
"When the other me tried to stop my magic, she exposed her cliency and dropped a hint." Regime!Witch continued.
"You made the right choice." Renegade Klug smirked. "I'm actually beginning to root for you."
Renegade Klug then walk away, but...
"Where's you going!?" Regime!Witch called. "The plan was to stay-"
"I won't be long, witch." Renegade Klug interrupted.
Meanwhile, somewhere in Arle's base, which is also (now) an artificial portal connecting Intral City to Arle's world...
"Ummm... if she said it was okay, it was good enough for tea." Skeleton-T, the same timeline as Count Roquier faced.
"Yeah... I asked myself, 'What if what happened to Dark Prince and Carby, happened to someone from yet another world?'" Demonic Sig replied.
"It made sense at first." Skeleton-T affirmed. "The victims were at peace. But now?"
"Arle isn't actually gonna kill the other me." Demonic Sig responded. "He's just bait. To expose an entire timeline."
"And then what?" Skeleton-T questioned. "Remember what she did to Rulue's Minotaur?"
"Something's wrong." Demonic Sig noticed. "Teleporter's offline."
"Somewhere you need to go?" Renegade Klug revealed himself.
"How did..." Demonic Sig noticed.
The demon ran towards Renegade Klug, but stepped onto a magical patch set by the latter, exploding upon step, knocking the demon off. Same went to the skeleton, but the floor collapsed.
"You're gonna lose, bones." Renegade Klug engaged.
Renegade Klug easily defeats the not-so-good Skeleton-T, owing to the former's prodigals and skills. "Still just a skeleton."
Renegade Klug went to the controls, but Demonic Sig saw it all. The demon finally gets to confront this Klug for giving away the soul to Sig only to betray him and joining the resistance.
"That nerd, stop!" Demonic Sig caught Renegade Klug in the middle of setup.
"Isn't that you, Sig..." Renegade Klug slaps Demonic Sig. "But I did it!"
The magic prodigy facing against the demon that used to possess him, now as to keep this timeline's Sig out of business. Its done by a Puyo battle. After this grueling battle, this timeline's Klug managed to subdue the demon by defeating him, but turns out his book is no longer be able to seal the demon, even with the Sun Bookmark, the Lantern Star, and the Stone of Moon together, for the demon is now taking in form of Sig with its soul completed.
"It's coming..." Renegade Klug walks away. "...and you've left that."
Renegade Klug returns to a frustrated Regime!Witch. "We're gotta get moving."
"What did you do!?" Regime!Witch is frustrated. "The reactor's gone critical!"
"First rule of warfare. Take out command and control." Renegade Klug argued. "The satellite we're working with is the key to Arle's dynasty."
"Damn it!" Regime!Witch grunts. "You've jeopardized the entire mission!"
"That sorceress's my priority." Renegade Klug ravelled. "Not that Sig."
"Puyo crew, Spacetime Detective! this is the Witch!" Regime!Witch reported. "We've secured the connection, but we've got a problem. The reactor's gonna blow!"
"Can you stop it?" Renegade Ringo asked.
"It's a runaway." Regime!Witch replied. "You have 90 minutes."
"We're almost in position." Renegade Ringo responded. "Ringo out." *hangs up*
"Now I'll have to teleport everyone out..." Regime!Witch is disappointed.
"Nice work!" Baroness Atari called.
"Got my hands full, Atari." Regime!Witch replied. "What do you want?"
"I need Klug."
"For what?" Renegade Klug heard it.
"I've learned that the Spacetime Detective Agency has prototype technology that allow us to re-weaponize the anti-Puyo set." Baroness Atari revealed. "I need you to bring it to me."
"Does Ringo know about this?" Regime!Witch asked.
"No." Baroness Atari denied. "She would've insisted on using the weapon herself. I need to do it."
"Ringo is the leader, face." Baroness Atari continued. "If she dies, the resistance crumbles and thus the Insurgency dies with her."
"Send over the coordinates." Renegade Klug suggested.
Meanwhile...
"Tee, get your crew into position." Renegade Ringo commanded. "Occupy any law enforcement you can."
"Yes!" Miss-S accepted. "We're on it!"
This timeline's Ex is free from his jail cell, thanks to the timeline's crew.
"Thank you, my dear daughter!" Renegade Ex hugs Miss-S. "I'd worry less about them though. Now, can leave."
"Let's go." Crew proceeded.
With Regime!Witch out...
"I can probably fix it, but dunno how long it'll take." Demonic Sig about the antenna. "Parts of the control panel were designed to accommodate Witch and her magics."