Enjoy!

Dark Shadow stared at this evil form of Darkspine Sonic.

Sonic had dark purple fur, Black eyes with no pupils, the stripes on Sonic's forehead were black, and the fire circling around him was dark blue.

He let out a loud scream of rage, then hit Shadow with unbelivable force. Shadow lost his negative energy as he slammed into a wall. "You're screwed, weakling." Sonic sounded demonic, and he hit Shadow with fire. It charred Shadow's fur, and he weakly got up and glared. Sonic gazed down at his fists. Instead of normal fingers, there was long claws shrouded in fire. "What the hell?"

Sonic was suprised at this look. "Heh. It suits me..."

Shadow threw a Chaos Spear at Sonic, which hit him in the chest. He groaned in pain, and got up. "Really? You're still trying to defeat me?" Sonic walked over to Shadow and held him by his neck. He then gripped harder, strangling him. Shadow choked as Sonic laughed. "You should've retreated when you had the Chance. Goodbye, dumbass." Sonic then strangled him harder.

"CHAOS... CONTROL!"

Shadow dissapeared with a flash of light. Sonic growled in annoyance, and Chaos Controlled, only to have the positive energy reject him. He frowned, and threw the emerald on the ground so hard it broke in two. Sonic looked and smirked, only for a blinding light to appear behind him. He cringed, and looked behind himself.

Tikal stood, frowning. "Sonic, what's going on?! I'm getting negative readings, all it's coming from you, out of all people!"

Sonic smirked, and said, "Well, I chose to avenge Tails, and I suggest you get out of the way before I incinerate you." Tikal stared in shock. "Tails is... Dead?"

Sonic looked down, and said, "I don't need your sympathy. I'll kill that fatass myself, and you can't stop me!" Tikal looked at the jewel that was sticking outside of Sonic's chest. Sonic glared at her and said, "Lay off, or I'll make you." Tikal was already startled by how Sonic swore, something he never did.

Shadow teleported to Tail's workshop. He sat down, and sighed. How was he gonna stop Sonic? He was insanely strong when he got the Chaos Emerald. "Why am I protecting him anyway?"

Sonic glared at Tikal. "WHY ARE YOU STILL HERE?!" Sonic snapped, startling Tikal. She looked away, and teleported. "He's corrupted..." She thought as she left.

Sonic transformed back to normal and smirked. Then, he teleported to Angel Island.

Knuckles was guarding the Master Emerald. He heard a flash, then saw Sonic. He grinned, showing his blood-covered fangs. "Well, what do we have here? The Master Emerald for the taking?" Sonic taunted. Knuckle's face lit up with rage, and he charged at Sonic. Sonic smirked, and grabbed Knuckles. He then threw him into the ground.

"That takes care of him..." Sonic said, then walked over to the Master Emerald. He started to glow black as Negative Chaos Energy was transferred. Sonic screamed as he glowed several color, then the black aura dissapated.

Sonic was swapping between evil versions of his forms simulatously. He thought of which form to use to kill Knuckles, then he decided to shift into the form that his "good" self dispised. The werehog.

Knuckles watched in fear of the monster approaching him.

Sonic howled, and smirked down at Knuckles.

He had black fur, yellow eyes, 2 wings, a long, wolf-like tails, and purple cuffs. He snarled, then pounced on Knuckles. Knuckles punched Sonic, only to hear a laugh. Sonic slashed Knuckles, then threw him into a tree. Knuckles got up, and attacked. He ran at Sonic, and grabbed one of his arms. He ran over to the edge of the island and threw Sonic over.

Sonic screamed as he fell. Knuckles smirked, then felt a little bad. He hoped Sonic didn't drown, or he would never forgive himself.

Suddenly, Sonic came back up, with an outstreched hand. He chuckled, then grabbed Knuckles. "You dumbass. You thought you could beat me by throwing? Pathetic!" Sonic then slammed Knuckles into a wall. "You bastard..." Knuckles then fainted. Sonic threw him aside, and thought of what form to take now. He grabbed 4 Chaos Emeralds and put them in his quills. He absorbed the Negative Energy, making him 15x stronger.

Sonic thought for a while, then smirked. "I can cut Shadow to bits with this..." Sonic then transformed into a twisted version of Excalibur Sonic.

His armor was purple, the sword he had was not Lancelot, instead it was a red and black sword covered in blood, and his cape was dirty and stained. Sonic laughed evilly, before going to slaughter Shadow and Eggman. "This is for you, Tails..." He then ran off.

And that's chapter 4! Please leave a comment and see ya next time! :)