Sonic and Tails arrived Station Square and decided to check if Chaos had visited. They were greeted with several screams and a wet, squishy noise. They quickly ran towards the sound and saw Shadow fighting the creation. There were several people lying on the floor because of either Chaos or Shadow.
"Yo, faker! Mind if I cut in?" Sonic asked, as he dashed forward and punched Chaos in the head. The machine vibrated and Chaos began to melt.
"Chaos spear!" Shadow cried as he hurled bolts of energy. They struck the puddle, causing it to make another wet scream. "So, you've finally arrived, blue hedgehog. I didn't need your help."
"Right, well I don't think we're done anyway," Sonic said, then pointed to Chaos. It began to resume it's normal form, but instead of becoming Chaos, it became a Silver hedgehog.
"Wow! It's transformation was flawless!" Tails exclaimed.
"How much stuff did you give this thing?" Sonic quickly demanded.
"Um, well, it has the ability to transform and adapt, so he probably knows a mix of your moves. Kind of like Emerl!"
"Great! Anyway to destroy it?"
"None that I know of. It completely trashed my lab!"
"Why would you create a monster?" Shadow butted in. Tails just stared at the floor again.
"C'mon, let's finish him!" Sonic cried, then leapt forward. Shadow followed. Chaos Jumped over both of them, then shot out an extended arm. Sonic ducked under it, but Shadow was struck and flew back. Sonic ignored Shadow and tried a series of punches. Since Chaos was now solid, he took each hit and let out a small groan. It quickly leapt back and murmured something, then shot out several blasts of energy similar to Shadow's. Sonic was slightly surprised by this, but was still able to dodge them. Shadow, however, leapt in the way.
"Finally, someone worthy of being my rival!" Shadow declared. He held his hand out and caught the blast, then sent it back. Chaos did a somersault under it, then dashed forward . He tried a punch, but Shadow sidestepped it and countered with an uppercut. He continued with a homing attack, then a spinning back kick. Chaos flew back into a wall, but easily stood up.
"My turn!" Sonic shouted, then started running. "Sonic wind!" Sonic ran in circles several times, creating a small tornado. Chaos flew upward, but seemed unfazed. Sonic hopped onto a wall, and began sprinting across it. With extreme power, Sonic leapt off, hit Chaos, then landed on an opposite wall. He tried it three times in succession, then jumped above Chaos and struck downward with a homing attack.
Shadow finished by striking a kick and sending Chaos into another wall. "Well, that was amusing." Shadow turned to leave.
"We're you goin'?" Sonic quickly asked. "How about a race?"
"Hm? I don't have any time to waste!"
"Yeah? Well what else are you going to do?" Sonic let out a smug grin.
"Well, I guess I do have some extra time…"
"C'mon! I'll see you at the unfinished highway near here. You should know where it is."
"Wow! I'll be sure to record this! I'll have cameras all around and confirm the winner!" Tails shouted, then darted to retrieve supplies.
"See you in an hour!" Sonic said, then followed Tails. Shadow just sighed to himself.