Battle at the Park
New Townsville: Science lab
After a flash of light, everyone reappeared at the lab.
"Come on! Let's get to work on finding the last Chaos Emerald!" Professor Utonium said. "As long as we can keep the remaining Emeralds out of Chaos's hands, wAt the e just might be able to stop him."
"Let's resume the search!" Sonic said and everyone rushed out of the lab.
New Townsville: Downtown
Sonic and Shadow zoom through the streets of New Townsville.
Tail in the Hyper Tornado, the Powerpuffs, Cream, Cheese, and Rouge take their search to the skies.
Knuckles, Amy, Professor Utonium, Ken and Poochi ride in the van.
Sonic heads into the park, when suddenly, from the lake, Chaos appears, with the Yellow and Blue Chaos Emeralds installed in his upper arms, and the Red and Green Emeralds in his belly.
Chaos is now Chaos 4, and he's now more shark-like with a back fin, his hands and feet are now webbed, with a horn on his head.
"Hey guys! I found Chaos, he's absorbed more Emeralds again, come quick, he's at the par..." Sonic says through his watch, but before he can finish, Chaos 4 slaps him, and break the watch.
"Ah, great." Sonic said. "Hopefully, the others will know what I was about to say."
Chaos 4 sends an energy wave at Sonic, who dodge by jumping.
Sonic lands on a big lily pad as Chaos 4 dive into the lake, preparing to attack Sonic at any given moment.
Chaos 4 leaped out of the water and headed for Sonic, but he jumped and landed on another lily pad.
Chaos repeated the same attack all over again, but Sonic jumped over all of them.
When Chaos 4 leaps out of the water again, but this time, Sonic grab onto Chaos 4 and ride him.
Chaos 4 attempt to shake Sonic off of himself, but Sonic grabs on tight.
Chaos 4 dive into the water and leap out several times, but Sonic still refuse to let go.
Finally, Chaos 4 lands on the ground with his back facing-down, finally getting Sonic off him.
Sonic gets back to his feet as Chaos 4 shoot a water blast, sending him into a tree.
As Sonic gets up, Sonic hears a plane approaching, it's the Hyper Tornado.
"Sonic, here!" Tails says as he press a button on the Hyper Tornado and it fires a Power Ring.
Sonic grabs the Ring and rush to fight Chaos 4.
Sonic headbutt Chaos 4 and knock him back into the lake.
Chaos 4 gets up and use the lake's water as waterspouts and send them at Sonic, but he just run circles around the waterspouts, dispersing them.
Chaos 4 spins his lower right arm like a drill, and attempt to punch Sonic with it, but Sonic Spin Charge to counter Chaos 4's attack.
Finally, Sonic Spin Dash into Chaos 4 and knock him down for good.
Defeated, Chaos 4 flee the scene by flowing away into the lake.
"Sonic, even though the transmission got cut off, I figured you were about to say, the park." Tails said as he landed the Hyper Tornado.
"Yeah, I'm just glad you got here in time." Sonic said.
Then, a ringing comes from Tails's watch, and Tails answer it to see the Powerpuff Girls. "Hey Tails, we found the last Emerald." Blossom said through the watch.
"The Professor, Ken, and Poochi went back to the lab to keep the two Emeralds that we have safe." Bubble said.
"And it just got even better." Sonic said and he and Tails fly to the girls location on the Hyper Tornado.
However, Chaos 4 emerge from the lake, having heard everything.
Sonic encounter Chaos 4 at the park, and after Tails arrive and send Sonic a Ring, he sends Chaos 4 retreating. Meanwhile, the Powerpuffs find the final Chaos Emerald, and Sonic and Tails rush off to their location, but unfortunately Chaos heard it all. To be continued...