Here's Chapter 4, and part 2 of the battle. As with the previous chapters, I hope you enjoy, and comment your opinion on it.

Chapter 4: Sad Memories, but a Good Heart

"Blast Away!"

Sonic speeds up towards the metallic hedgehog, and unleashes a barrage of punches and kicks at the barrier that Metal Sonic had formed.

"Don't think that Super Peel Out attack will work, Hedgehog! Initiating Ring Spark Field!"

"Sonic... Boom!"

Metal Sonic unleashes a barrage of electricity bolts, aiming for the hedgehog, but Sonic dodges each and every last one of them until the attack was over.

"Take this!"

Sonic runs around Metal Sonic, forming the Blue Tornado as he ran faster than the speed of sound. Metal Sonic anticipated this attack, and tried to homing attack the hedgehog, but Sonic dodges the attack by running out of the tornado, and begins to charge an attack in his hand.

"Try this on for size! Sonic Wind!"

Sonic swings his hand to cut the air, unleashing a projectile made of air. As it sped toward Metal Sonic, the robot was still caught in the tornado until it disappeared. He looks around for the hedgehog and manages to find him, but sees a projectile heading towards him.

"An unidentified attack is speeding towards me. I'll just let the barrier take care of that."

"Heh heh! Don't count on that barrier helping you escape from my special attack!"

"Is that so? Scanning attack."

As Metal Sonic scans the attack, the Sonic Wind quickly closes the distance between it and the robot.

"Identified. Attack is called Sonic Wind. It's able to pierce even the strongest of barriers."

"That's right, metal head, and with the Sonic Wind approaching you at a quick pace, you won't have enough time to dodge it."

The projectile hits Metal Sonic's barrier, making it disappear. While it slices through the barrier, it hits Metal Sonic, damaging his circuits.

"Gotcha!"

"Circuits have been damaged. Initiating circuit recovery mode."

Metal Sonic recovers from his overload, and gives Sonic a serious look. Since Metal Sonic dispersed from Hyper Mode, he has a cooldown to wait until he's able to unleash it again.

"Oh! Did I hit a circuit?"

"Sonic, I have toyed with you long enough. Now it's time to show off my true power!"

"Heh! I love to see that."

"Overloading circuits to increase maximum fighting potential."

Metal Sonic begins to charge his power by overloading his circuits. In the past when he first battled Sonic, Metal Sonic couldn't hold his Overloading for a long period since it damaged his programming, but since Eggman has gave him major upgrades, it was now time to show his rival what it meant to be strong.

"Initiating Maximum Overdrive!"

"Uh oh… That doesn't sound good…"

The robot gets covered in a Yellow aura, indicating that he was about to perform his V. Maximum Overdrive Attack. However, what was different about him was that he was not doing the attack, but rather, channeling the energy that was overloading his circuits.

"This is must be the power that you were talking about, isn't it, Metal Sonic?"

"Now you shall know the true meaning of power! Prepare yourself, Sonic!"

"With pleasure, you bucket of bolts!"

The two sped towards each other at light speed, unleashing a barrage of punches and kicks to another. The strength and speed of both were so great, when they clashed one could hear the sounds of sonic booms in the distance. With the sounds traveling very far from their location.

Amy's location

"What was that?"

Amy listens to the sounds of attacks clashing together.

"Sounds like someone is fighting. I hope that isn't Sonic fighting already. I should check it out, just in case. I do have the magical gems he gave me so I can become stronger. Let's use this Blue Gem. I think it was supposed to increase my speed."

While Amy was running towards the battle, the two were already fighting in Light Speed. They were fighting so fast, one could see the wind being cut through. The clashing of their attacks grew stronger and louder as each blow collided with one another.

Tails and Knuckles' Location

"What's that sound, Tails?"

"That's the sound of Sonic fighting Metal Sonic, Knuckles."

"What could him and Metal Sonic be doing to emit loud sounds like that? It sounds like explosions you could hear from a mile away."

"Hmm… It seems like they're fighting in light speed."

"Is that so? Even if we were to jump in and help him, we're not fast enough to catch up to either of those two. We'll just be in the way."

"Well, there is one person who's able to catch up with them."

"Who? Wait! You don't mean-"

"Yep. Amy can catch up with him, and Metal Sonic. The gems that Sonic gave her will prove useful in this battle, and she's been treasuring those gems too."

"I don't understand why he keeps playing with her heart. He should just date her already."

"I do agree with you, Knuckles. However, even I understand what it's like to have a self-proclaimed girlfriend who's not only your biggest fan, but wants to be with and just like you 24/7."

Knuckles agreed with Tails, as he knew Sonic would go insane from being alone with her for more than 10 minutes.

"Well, we just have to see how their relationship turn out, huh?"

"Yeah, but I believe Sonic won't make a move on Amy, unless he sees her in a predicament, similar to Cosmo."

"Yeah."

Knuckles realizes what he's said, and quickly tries to apologize.

"Oh wait! I didn't mean it like that!"

"It's ok, Knuckles. I know you mean well."

"Oh. Do you still have dreams about her?"

"Yeah, I do… It still makes me sad to this day, that she sacrificed her life for me… but that also makes me happy… I'll probably never find someone who really loved me like that… That's why I'll keep her promise, and her will with me… Always..."

"Tails…"

Knuckles felt really sad to hear Tails' grief, but admired how strong he's gotten since her sacrifice. His respect for Tails has grown since then, and even fighting to keep their world safe, while keeping Cosmo's will and promise with him for years, there's no telling how strong and courageous the two tailed fox really is under that yellow fur.

"Shall we go watch them, Knuckles?"

"Sure, Tails. Let's go."

Tails and Knuckles walked towards the battle. "Cosmo…" muttered Tails, as he walked. Feelings of sadness grew on him as he wanted to let his tears out, but couldn't, knowing he would have to be prepared to fight Metal Sonic if things got of hand, or if Metal Sonic would target him during the battle.

I'm going to be adding a part 3 to the battle, and that will be the finale. To include a sad part during the battle is crazy, but I thought it flowed well with the story, and it adds understanding of why Tails' personality is the way it is now. Tune in for chapter 5 later on this week, or next week.