Back in the displaced city, Klaus was busy defending the blonde-haired boy (the detransformed Cat Noir)from attacking Gundalians. Evidently, one of the conflicting personas inside the Professor's body had decided to deal with the two Miraculous holders, in the event that the power he was absorbing from the Kwami was returned. Fortunately, despite how quickly the Gundalian Invaders had adapted to the Bakugan of New Vestroia, Klaus had much stronger synergy with Sirenoid.

"Ability, activate! Dive Mirage!", Klaus called out. Sirenoid transformed the ground beneath them into a liquid, which she then dived into. "Now your gate card can't open for the rest of this round."

But the opponent had prepared a counter. "Ability, activate! Ability Counter!" His Pyrus Robattalion emitted an energy wave that restored the ground beneath them to normal, forcing Sirenoid out onto the solid pavement. "Now Double Ability, activate! Robattalion Enforcement, plus Fire Tornado!"

Pyrus Robattalion power level: 450 G increase to 700 Gs. Aquos Sirenoid power level decrease of 100 Gs to 800 Gs.

"Looks like he's trying to turn this battle in his favour, Klaus.", Sirenoid commented. "If he can activate a powerful ability, it's all over."

"Then we'll just have to stop him from doing that.", Klaus replied. "Double Ability, activate! Final Neptune, plus Forcement Wind!"

Sirenoid power level increase to 1100 Gs. Robattalion Ability nullified, reducing power level to 450 Gs.

Sirenoid attacked Robattalion, knocking him back into ball form. Due to the Vestal ante rule*, Robattalion returned to Klaus rather than the Gundalian. "Looks like you bested me this time.", was his response. "I hope we can battle again some day, under more peaceful conditions." With that, he was gone, teleported back to his home planet.

"I look forward to it.", Klaus said to himself, as Sirenoid returned to his hand. Then they were hit with a blinding light, which quickly cleared to reveal…

"I am Frosch, one of the 6 Legendary Soldiers that saved Vestroia in ancient times. Klaus Von Hertzen, we need your help to save the universe.", the figure stated dramatically.

It was then that the undressed Cat Noir spoke up. "Excuse me, but what's happening over at the citadel? Has Dan defeated the the guy who stole our powers?"

"Indeed, young one.", came Frosch's reply However, regaining your powers is not as simple as was indicated. Plana had no method of relinquishing the power once it was reabsorbed."

"You mean I've lost my powers forever? That Plagg and Ladybug's Kwami are going to -?"

"Not quite.", was the response the bearded blue man gave him. "Us Legendary Soldiers can recharge your Kwami with our Attribute energies, not quite restoring your old powers, but renewing them with the 6 natural energy forces."

"Is that why you came to us, Master Frosch?", Sirenoid enquired. "To inform us of a way to help the children recover their special powers?"

"No. You and Klaus are also required, in order to help restore this city to its proper place on Earth. A ritual that requires 12 Brawlers from across the 4 worlds, 2 specialists for each attribute. A ritual, that I fear, is sadly doomed to failure."

"What's causing this fear that the ritual won't work?", Klaus asked.

Frosch turned to him and stared. "Because while we have the specialists for Sub Terra, Haos, Pyrus and now Aquos, we lack a specialist each in Ventus and Darkus."

On the other side of the planet, Tristar and Taylean had joined in the battle against the Chaos Bakugan, destroying those that Fabia's Bakugan were being overwhelmed by. "Tristar launched a torrent at his opponent. "Hyper Stream!" The energy destroyed a few Iron Dragonoids.

"Nice move.", Taylean commented. "Let's see if I can match. Slash Rise Thunder!" He launched a hurricane at a group of Flash Ingrams, obliterating them.

Akwimos was the first one to join in on their trash talk. "Great job, but there's still about 6 dozen of these things left.", he commented, as he annihilated 4 Cyclone Percivals with his Spiral Pressure Ability.

"This is no time to be bickering.", Fabia yelled. "We need to finish cleaning these thing up, so we can rebuild after the disaster at the conference."

"Then it's a good thing we're here." Everyone turned to see Shun's party flying in on their Bakugan. "Because we're the control that's exterminating these pests."

"Shun, that was just terrible.", Alice sighed.

"I know, right? We can do better than that, can't we?", added Julie.

"We can make a witty retort later.", Marucho stressed. "For now, we need to get rid of these Chaos Bakugan."

"You're welcome to them, because we're getting sick of them.", Hawktor commented.

"Oh yeah.", Preyas yelled. "Let's get down to kicking some serious butt."

"You know it.", Radizen replied, before launching his attack. "Abyss Blade!"

Jaakor was the next to join the fray. "Moonlight Shadow Slash!"

Then Orbeum and Skytruss attacked together. "Super Explosion Burning!"

Preyas: "Blue Squall! Let's see how ya like this."

Skyress: "Destruction Meteor Storm!"

Gorem: "Grand Impact!"

Hydranoid: "Chaos! Of! Darkness!"

Then Dan flew in with Drago and Reptak. "Don't leave me out of the fun. Double Ability, activate! Dragon Eternal Force, plus Mega Harvey Cannon!"

Drago glowed with the energy of the Perfect Core and fired that energy at the Chaos army. "Let's see how you react to the power that created our world."

Reptak's Cannon un-retracted and fired a powerful laser at its target. "They probably won't like this very much either."

In the aftermath of the blast, there were only 30 Chaos Bakugan left, 10 of each species. Dan took the opportunity to catch up with his newly-arrived friends. "So the bad news is that our dimensions are going to fall apart unless something is done. But the good news is that the Professor and his glowing blue friend are dead."

"Not quite as dead as you think, Kuso!" Dan and his friends barely had time to react, as black tentacles grabbed the remaining Chaos Bakugan, enveloping and absorbing them. Then the tentacles coalesced into a giant Bakugan-like creature, with a body like Jaakor's, wings like Longfly's, claws like Fangoid's horn, shoulders resembling Iron Dragonoid and Flash Ingrams' heads and a head resembling Cyclone Percival's. His colour scheme was a mix of all six attributes. "In fact, we're better than ever before."