"My children still have many lessons to learn. But some lessons are so big, it takes a whole world to discover them. Now Mobius is learning the greatest lesson of all." Aleena said.

"Boy outside one thing, chaos ain't all it's cracked up to be." Dingo said and got electrocuted after connecting the emerald shards. "Whoa!"

Dingo has a spasm, he flew backwards and hit a mountain. He watched the two shards separate again and sighed.

"Whoa!" he said.

A huge green light expanded and blinded the entire area as Sonic and her siblings drove in their Camper Van.

"Whoa! We're really rockin' and rollin'!" Sonic said.

"We've got to find Knuckles before Robotnik does!" Sonia said.

Sonic had a concentrated look on her face and pushed the gas pedal down. The green lighting flashed and chased them away. Thunder and lightning struck. The van was parked and the trio moved out.

"Knuckles!" Sonia echoed.

"Yo dude!" Manic echoed and lightning struck again. "Sleepless badger." he said and she gasped.

"Knuckles wouldn't have surrendered without a fight. He could be hurt, or worse..." she said and started crying.

Meanwhile lightning struck a couple more times, and soon stopped. Sleet and Knuckles walked towards Robotnik, whom smiled.

"Well, what have we here?! Knuckles the Echidna. Good work Sleet," Robotnik said and walked to Sleet and patted him. "I didn't think you had it in you."

"He doesn't. I'm here on my own - To make a deal." Knuckles said.

"I don't make deals." Robotnik said and lightning struck. "And even if I did... Why would I make a deal with you?"

"To save your precious Robotnik Empire. I know how to contain the Chaos Emerald. If we join forces, we have a chance to stop this Chaos." Knuckles said and lightning struck again.

"Hmm, I'm always open to saving myself, but if I'm going to help you then you've got to help me." Robotnik said firmly. "I want the hedgehogs..." he said and lightning struck again.

"You've got to be kidding! I'd never betray my friends!" Knuckles said shocked.

"Then I guess the destruction of Mobius will be your fault." Robotnik said and laughed. "Too bad."

"You don't mean that, Robotnik. You're bluffing!" Knuckles said and Robotnik laughed.

"If I can't defeat Sonic," Robotnik said harshly. "then I hope Mobius is destroyed!" he said and Chaos energy struck the area.

Knuckles was forced to cover his head as debris fell around the area.

"He means it. He'll let Chaos destroy Mobius if you don't help us capture the hedgehogs." Sleet said and Knuckles put his head down in sadness while Robotnik laughed louder

"If you do capture them, Sonic, Manic... Sonia... Would you roboticize them?" Knuckles asked.

"Roboticize them? Of course not! I'd keep them as prisoners so I could taunt them with my victory." Robotnik said.

"But I, I can't betray my friends!" Knuckles said and turned around to think. "But I can't let Mobius be destroyed... Alright! I'll do it!" he said and started crying. "For the good of Mobius."

"I knew you'd make the right decision. Someday, all of Mobius will thank you, well... almost all." Robotnik said and laughed.

Later.

"If Knuckles is captured, we've got to rescue him." Sonia said.

"We've gotta save Mobius first or it won't matter - Know what I mean?!" Sonic said.

"No problemo sibs. How do we contain the Chaos Emerald without Knuckles? He's got the canister... Oh boy!" Manic said and the green light came their way. "Run for cover!" he said and they hid underneath the van.

Some bolts fell off the Van and landed on their heads.

"Ow!" Sonia said and the mysterious light came over them.

"Funny thing about chaos - You can't predict it." Sonic said.

"Knuckles!" Sonia said and Knuckles arrived. "We though you were Buttnik's prisoner!" she said and he put his hand out to halt her. "Oh I thought we'd never see you again!"

"Well I... I managed to get away from Sleet." Knuckles said.

"Alright, I'm glad you're back!"

"Sleet didn't get this."

"Great. Now all we need is to find the Emerald." Sonic said.

"Well, I think I figured out where it is. But, I'm gonna need your help."

"Well, what are we waiting on?! Let's jam!"

Later Sonic, Manic and Sonia were inside of the van.

"You know Knuckles, Sonia was ready to give up Mobius for you. Haha!" Manic said.

"I was not! You just keep your mind on finding that Emerald!" Sonia said protesting.

"Yeah, Manic. Nothing's more important than saving Mobius... No matter what it takes." Knuckles said.

Later.

"The Chaos Emerald is just on the other side of this canyon." Knuckles said.

Robotnik and two Swatbots were watching from high above, and saw their van.

"Open fire!" Robotnik said and the swatbots shot out some glue.

The van drove over it and got stuck.

Sonia gasped and they all left the van.

"Huh?" she said.

"We're stuck!" Sonic said and lightning struck again.

Suddenly Manic saw Robotnik from up high.

"Bad news sibs - Buttnik!" he said and the Swatbots aimed their guns again.

"Don't leave! Stick around!" Robotnik said and the Swatbots fire again.

Sonic, Manic and Sonia got stuck in huge dollops of glue. Sonic strained and tried to get the glue off, but they stuck on both hands instead

"Sonic!" Sonia said.

"Knuckles, quick! Help!" Sonic said.

"I'm sorry... But... It's for the good of Mobius." Knuckles said and Sonic, Manic and Sonia gasped.

Robotnik lowered and parked his vehicle.

"Surprise, surprise! It was your friend Knuckles who led you into my trap!" he said.

"Knuckles?!" Sonia and Manic said and Knuckles looked at them guiltily then looked down.

"No! I don't believe it!" Sonia said.

"I had to." Knuckles said. "I kept my part of the bargain, Robotnik. Now we find the emerald!" he said angrily to Robotnik.

"Yes! The Emerald. But first thing's first - Bring out the portable roboticizing chamber!" Robotnik said and Knuckles gasped.

"A perfect ending, your roundness. Only you could trick Knuckles into betraying the hedgehogs." Sleet said.

Then more lightning struck.

"You said you wouldn't roboticize them." Knuckles said and Robotnik gasped.

"Not roboticize them?! Did I say that?" he asked.

"Not that I recall." Sleet said and Knuckles gasped.

"I didn't think so. Start with Sonia!"

"Don't touch me you butt-head!" Sonia said and the swatbot grabbed Sonia. "Wha! Hey! Ow!" she said and screamed as the Swatbot carried her towards the Roboticizer's chamber.

"No!" Knuckles said and prepared a fist attack, scaring Sleet behind the building.

Robotnik also took steps back. As a swatbot came in and blocked the entrance, Knuckles came in with his fists and destroyed the swatbot. He grabbed the Swatbot's gun and started to shoot..

"No Knuckles..." Robotnik said and the gun was fired at the Swatbot holding Sonia, setting her free.

"Yeah! Get 'em Knux!" Sonic said.

"Ah yeah, get 'em Knux, let 'em have it! Ha, ha... Nice going!" Manic said.

Knuckles shot the glue gun repeatedly at it, causing it to fall into the roboticizing pod.

"No! You can't roboticize a robot, you'll overload the system!" Robotnik said.

As the roboticizer overloaded, Sonic struggled to break free of the glue.

"Whoa!" Sonia said.

The Roboticizer exploded, blasting Sonia high while still attached to the glue and making her scream. She was pulled into a particular spot and her eyes roll in dizziness.

"Now to dissolve that glue." Knuckles said and used a different gun on Sonia, removing the glue that was on her.

"Ah!" Sonia said.

Then he shot at Manic and Sonic, dissolving the glue and breaking them free.

"Good to have you back, dude." Manic said and they hopped inside their van.

Knuckles destroyed the glue around the Van and the Van drove away.

"He destroyed my roboticizing chamber! Get him!" Robotnik said angrily and Swatbots chased after them.

"Hang on! Manic man stops for no bot!" Manic said and the van drove through two Swatbots, knocking them over.

Lightning struck again and Manic looked away while driving and exhaled in relief.

Sonia gasped.

"Manic!" she said and Sonic immediately tapped Manic, making him alert again.

Lava spread towards them from ahead and Manic gasped.

Then he put his foot hard on the brake pedal and the van started skidding.

"No!" he said.

"That chaos wave must have set it off!" Sonic said.

"Better back it up - Or we're hedgehog stew!" he said while Swatbots and Robotnik's vehicle chased from behind and lightning struck again. "Yo, we can't go backwards!"

"Follow me!" Knuckles said, jumped out and broke a huge hole through a wall.

They advance through the hole with the lava following them. The lava also headed for Robotnik's vehicle and his swatbots.

Robotnik gasped.

Sleet pressed a button repeatedly, but the vehicle didn't move.

"Huh?" Sleet said.

Instead the vehicle's tail-fin kept hitting the terrain above.

"What are you waiting for, you fool?!" Robotnik asked.

"I'm reversing, I'm reversing!" Sleet said and the vehicle started reversing away from the lava.

Meanwhile Sonic, Sonia and Manic made it to the ground above.

"Quick thinking Knuckles!" Sonia said.

"Yeah - I really dug what you did!" Sonic said and laughed.

"Good one Sonic!" Manic said.

"I never should've trusted Robotnik." Knuckles said miserably.

"You were desperate to save Mobius. I might have done the same thing in your place." Sonia said.

"Hey, are you forgetting something? We still gotta find the Emerald!" Sonic said.

Later they drove in their Camper Van. Sonic saw the bright green light up ahead.

"Hey, what's that!? That's gotta be the Emerald!" Sonic said. "Give me the canister and I'll check it out!" she said to Knuckles and more lightning struck.

Dingo while shielding his eyes ran toward the Chaos Emerald, but Sonic dashed ahead and saw him.

"Hi guy! What's the prob?" Sonic asked.

"You are, hedgehog!" Sleet said and he and the swatbots arrive and she gasped. "...But not for long!" he said. "Get the Emerald!" he ordered to the Swatbots and a swatbot grabbed the Emerald.

Dingo chuckled.

"Sleet! Am I glad to see you." he said.

"You traitor! I'll deal with you later. But first we've got to get the Emerald safe." Sleet said and used the Shapeshift Remote to turn Dingo into a box.

"Oh no, not that, Sleet!" Dingo said and the swatbot put the Chaos Emerald into the box.

"Keep your mouth, and your door shut!"

"That thing may keep me out, but it won't keep the Chaos in! This canister is the only thing that'll contain the Emerald." Sonic said.

"Why should I believe you?"

"Uh, Sleet..." Dingo said and Sleet gasped as Chaos energy tried to protrude through the box. "I don't feel so good!" he said and exclaimed in pain.

"Wuh-oh..." Sonic said.

Dingo grew radically and turned into a massive monster, making Sonic and Sleet panic.

Sonic and Sleet moved away as Dingo edged up on them and trampled over a Camper Van.

"Wait Sleet... Morph him into a kitten, a puppy, anything!" Sonic said and Sleet pressed the button on the remote several times.

"It's not working!" Sleet said.

"Keep trying! I'll be back with help!"

"Dingo! Oh... wow, partner... You don't look so good. Is there anything I can do for you? Is there anything you, you want?" Sleet asked nervously.

"I want... CHAOS!" Dingo said and blew Sleet away.

Meanwhile.

"Did you get the Emerald?" Knuckles asked.

"I think we're gonna need a bigger canister." Sonic said and Dingo approached.

"Chaos! I want CHAOS!" Dingo echoed.

"Dingo? Oh man, and I thought he was ugly before!" Manic said.

"Chaos definitely isn't his look." Sonia said.

"Rargh!" Dingo said and unleashed an energy blast to the top of a mountain, which erupted into a volcano.

He created brick-shaped fists and pounded the top of two nearby mountains, erupting more lava. He roared at the heroes, whom have shocked looks on their faces.

"He'll tear the whole planet apart!" Knuckles said.

"Not if we stop him!" Sonic said, gave the canister to Knuckles and shot at Dingo using her guitar but was unharmed.

"Argh!" Dingo said and smashed down on the ground so Sonic dashed away to avoid.

"Ah!" she said and Manic brought out his drums and banged them repeatedly.

"You call that an earthquake? This is an earthquake." Dingo said and pounded the ground so hard that Manic's drum set shatters.

Manic gasped.

"Whoa dude!" he said.

An arch broke off and another volcano erupted.

"He's too strong!" Sonic said nervously and Dingo casually walked away when Robotnik's vehicle arrived by the hedgehogs. "Robotnik! Oh just what we need."

"Get the hedgehogs!" Robotnik said.

"Wait! Dingo swallowed the Chaos Emerald!" Knuckles said.

"He's turned into a monster!" Manic said.

"He'll spread chaos all over Mobius!" Sonia said.

"And your point is..." Robotnik said.

"He's heading straight for Robotropolis! He'll turn you into rubble if we don't stop him!"

"Ooh, I'm scared! As if Dingo could do anything right." Robotnik said pretending. "Get up!" he ordered and Swatbots set off. "Ahh."

"But Dingo stole the Emerald from you! You gonna let him get away with that? You're the man, the Buttnik! The Butt my sir, you're gonna let Dingo make a monkey out of you? You'll be the laughing stock of Mobius!" Sonic said.

"Nobody steals from Robotnik and gets away with it. I do all the stealing around here!"

"That's the old Buttnik I know and don't love! Now picture this... I got a plan to put Dingo in his place." she said and whispered into his ears.

"Hmm... I like it!"

Meanwhile.

"Robotropolis! And it's all mine!" Dingo said and prepared to unleash chaos energy, but heard Manic's drumset playing and looked back.

Sonic, Manic and Sonia brought out their musical instruments.

[The song "Mobius Stomp".]

The Swatbots used the glue gun to stick Dingo to the ground.

"I can't walk!" Dingo said while struggling and Sonic pushed Robotnik forward for a brief moment.

"W-What are you doing? What am I supposed to do now?" Robotnik said and Sonic gave him a thumb up.

"Just stand right there!" Sonic said.

"Why?" he asked and she zoomed off. "No wait!"

"I'm falling!" Dingo said, tumbled on top of Robotnik and spit out the Chaos Emerald.

The Chaos Emerald shards floated up in the air. Knuckles was holding the canister and ran as hard as he could. Then he dove and body surfed along the ground, keeping the canister upright. He caught all the shards and the canister glows. He closed the lid of the canister and Sonic, Sonia and Manic walked over to him.

"Nice catch!" Sonic said.

"Give the credit to the team!" Knuckles said.

Dingo shrunk away, still on top of Robotnik, who muttered. Dingo suddenly saw Robotnik and put his hands by his mouth.

"Uh oh." Dingo said, jumped off of the glue patch and tip-toes towards Sleet while Robotnik rubbed his sore head.

Sleet already had his hands on his hips along with an angry look on his face.

"Uh... Hi, Sleet." Dingo said.

"Dingo! I'm gonna roboticize you! First for stealing the Chaos Emerald, again for letting Sonic escape and a third time for flattening me! And then!..." Robotnik said angrily "No more Mr. Nice guy!" he said evilly.

Later.

"Athair, we brought you the Chaos Emerald for safekeeping." Knuckles said.

"The Emerald must be kept by you. On the floating island." Athair said.

"But you'll be coming with us won't you, to join the Resistance?" Sonia asked.

"Knuckles' duty lies on the floating island. Just as your duty lies with the Resistance."

"And finding mom!" Sonic said.

"But if you ever need a break from fighting Buttnik, there's always room on the floating island." Knuckles said.

"And you're welcome to sit in with a Band anytime!" Sonia said and kissed him.