This is a request from Kitty in Boots. I'll be making Sonic 15 and Tails 8.
Disclaimer: I don't own Sonic the hedgehog and never will.
Sonic was heading toward Green Hill Zone. Eggman made a broadcast saying that he had a new scheme that will allow him to take over the world and told Sonic to meet him at Green Hill for a duel. Of course Sonic accepted it and decided to head for Green Hill immediately.
Tails had seen the broadcast and told Sonic that he wanted to come, but Sonic told him that he couldn't because it might be a trap. Tails was upset by this, but agreed that he wouldn't come or so Sonic thought.
Tails was secretly following Sonic, making sure he stayed back a good distance so that Sonic wouldn't see him. When Tails had seen the broadcast he believed that Sonic was right when he said that it was a trap and wanted to help him if needed.
Five minutes later Sonic had arrived at Green Hill Zone. He started looking around to see if he could find Eggman. Suddenly the sky went dark and a huge shadow was cast right where Sonic was. Sonic immediately jumped out of the way as something crashed right where he previously was. He spun around to meet the robot he knew that he would face.
The robot was a 10 foot human shaped robot. It was dark blue in color with missile pods on the legs. The right arm of the robot was a large silver canon. On the back of the robot was a jet pack so it could fly. The robot was staring at Sonic with it's dark red eyes glaring right at him.
The head of the robot opened up to reveal Eggman smirking at him. "Hello Sonic, I'm so glad you could make it. At first I thought that you wouldn't come."
Sonic rolled his eyes. "What made you think I wouldn't come? Have I ever not accept one of your challenges?"
Eggman stroked his mustache. "I can't argue with that. Anyway, are you ready to face my Egg Smasher?"
Sonic got into a battle position. "Bring it on Egghead!" he than charged toward the Egg Smasher curling up into a spin dash.
The Egg Smasher jumped out of the way causing Sonic to go by. Hatches opened up on the back of the robot and fired 8 missiles at Sonic.
When Sonic landed on the ground after failing to hit the Egg Smasher with his spin dash, he didn't notice the missiles heading toward him. When he spun around again his eyes went wide and couldn't move away in time as all 8 missiles hit him causing a huge explosion.
Meanwhile Tails was hiding behind one of the loops watching his brother fight Eggman. After seeing the missiles hit Sonic he began to get worried. When Tails could see again, he saw Sonic on his knees and was trying to get up. He watched in horror as the Egg Smasher charged up it's canon and fired a large beam that struck Sonic making him go flying into a loop, which caused it to crumple on him.
The missile pods opened up on the legs of the Egg Smasher and at least two dozens missiles fired out hitting the loop where Sonic was making another big explosion. The Egg Smasher went up to the loop where Sonic was trapped underneath.
Once the Egg Smasher reached the loop it knelt down and moved the debris around until Sonic was seen unconscious. Eggman smirked and the Egg Smasher picked up Sonic. "Finally, now my real plan can begin! Ha ha ha ha!"
Eggman was about to leave when he saw something out of the corner of his eye. He quickly made the Egg Smasher turn around to see Tails peak out from behind the loop before quickly hiding behind of it again.
"I know your behind there fox, so you don't need to hide." Eggman said.
Tails came out from behind the loop to see the Egg Smasher holding Sonic in it's hand. "Let Sonic go Eggman!"
Eggman smirked. "Sorry fox, not going to happen, I need him for something. In the meantime you can have fun with one of my new pawn robots."
Something came from the sky and headed toward Tails. When it landed Tails could see that it was a new Egg Pawn. It was three times bigger than a normal Egg Pawn. It had robotic wings and was carrying two guns in it's hands.
"Have fun you two!" Eggman said as the Egg Smasher flew away with Sonic in it's hand.
Tails glared at the Egg Pawn. "No stupid robot is going to stop me from saving Sonic! So I would move it if I were you!"
"Sorry fox, not going to happen." the Egg Pawn said with a monotone voice.
Tails blinked. "Wow, you talk? That's new."
"Is that a problem for you?" the Egg Pawn asked.
Tails shook his head. "No it's not since you won't be talking for much longer after I'm finished with you!" Tails ran toward the Egg Pawn curling into his own spin dash .
The Egg Pawn flew in the air to avoid Tails' spin dash. It then started firing blue lasers from both guns at Tails.
Tails hearing the lasers being fired quickly flew in the air to avoid them. Tails than started toward the Egg Pawn at intense speed punching it in it's face before it could move. He started pulling different combos from punching, kicking and finally spin dashing the Egg Pawn in the chest destroying it.
"Well that wasn't so hard. Now to go save Sonic." Tails said flying toward Eggman's base. After about 5 minutes of flying he finally reached Eggman's base. Landing on the ground Tails looked around watching out for robot guards.
Seeing none, Tails ran toward the entrance of the base expecting to see guards. However upon reaching the entrance, he didn't see any robots guarding which made him realize that he was walking into a trap.
Tails walked in front of the entrance expecting the door to open, but didn't. He saw a control panel next to the door and walked up to it. The control panel looked like a keyboard as it numbers and letters on it. On the keyboard there was a green button. Tails pressed it and on the screen the words "please enter password" popped up.
Tails began to think of what the password could and frowned. "Eggman is #1" he typed.
The screen lit up and the door opened up. Tails shook his head. "Number 1 my tails." he thought running inside the base. When Tails was inside he started running toward the control room where he knew Eggman would be. Upon reaching the control room, he was met by Eggman standing next to the main control panel with a smirk on his face.
"Why hello Tails, what brings you here?" Eggman asked with a smug look.
Tails growled. "Don't play dumb games Eggman! You know I'm here for Sonic!"
Eggman grinned. "Well since your here, I guess you can be the first one to see my new weapon that will be your doom and allow me to conquer the world! Now my new weapon, why don't you come out of your hiding place behind the control panel and reveal yourself?"
Tails got into a battle position for whatever came out. When he saw what had come out he dropped his battle stance and stared at what had come out in disbelief. What had come out was the person who mattered to him the most. His savior, hero and more importantly, his big brother.
Sonic was staring at Tails with hateful eyes. His once bright green eyes were now dark and sinister. This was not the same person who raised Tails for 6 years, but a completely different person.
"S-Sonic?" Tails asked not believing what he was seeing.
Eggman laughed. "Sorry Tails, but Sonic is on my side now! I brainwashed him to believe that he serves me! Now Sonic, destroy this intruder!"
Tails held his arms out in defense. "Wait Sonic, I don't want to fight you!"
Sonic ran toward Tails and punched him in the face making him go flying into the wall. He than curled into a spin dash and shot toward Tails.
Tails recovered in time to see Sonic coming toward him in his spin dash and jumped out of the way before Sonic hit him. Tails pulled his right glove back to reveal a small watch and pressed a small black button.
The sound of jet engines was heard and the X-Tornado broke through one of the walls just as Sonic pulled himself out of the wall after missing Tails.
Tails quickly jumped into the white plane and pressed one of the buttons. The plane started transforming as the two boosters in the back became legs. The plane had turned into the X-Cyclone.
Sonic spun around to see the X-Cyclone with Tails inside it. Sonic smirked and ran toward the X-Cyclone curling into a spin dash. Tails made the X-Cyclone jump out of the way before Sonic hit it.
Sonic was about to hit the wall again, but he uncurled himself and when he was about to hit it he kicked the wall using it to give himself a boost as he did a homing attack at the cockpit knocking it down. Sonic jumped in the air and did his bounce attack at the X-Cyclone.
Tails quickly activated the boosters on the legs which made the X-Cyclone slide out of the way before Sonic could hit it.
"Sonic, please stop! I don't want to hurt you!" Tails said as the X-Cyclone picked itself from the ground.
"Don't bother fox, he's not going to listen to anyone besides me." Eggman stated.
Tails turned the X-Cyclone so he was facing Eggman. "Your wrong, I know the real Sonic is still in there!"
However turning away from Sonic was a big mistake that Tails did because as Tails was talking to Eggman, Sonic was charging up for his light speed attack.
By the time Tails looked back at Sonic, it was too late as he finished charging. When Tails saw Sonic glowing blue he knew full well what was going to happen and wouldn't be able to avoid it.
Sonic shot off in a spin dash toward the X-Cyclone. He than started striking everywhere at such speed that within 5 seconds the X-Cyclone exploded and Tails was sent flying in the air before crashing into the ground. Sonic started walking slowly toward Tails.
Tails turned is head toward Sonic with tears in his eyes. "Please don't do this Sonic! You don't work for Eggman, your a hero and more importantly my big brother. Remember when we met inside the small cave in the Great Forest and you instantly called me your little brother?"
Sonic stopped walking and fell down on his knees shaking his head as if he fighting something.
Tails seeing Sonic fighting continued on. "Remember the time when I tried to make breakfast in bed for you, but failed? Than you taught me how to cook and I started making breakfast for you a lot! Or how the first time I fought Eggman with you? Please Sonic you got to remember who you are!"
After a minute of shaking his head Sonic stopped and looked up at Tails with a smile on his face. "I do remember little bro."
Tails smiled back before he lost conscience which made Sonic gasp. He was about to run to him when he heard Eggman growl.
"That stupid fox ruined everything!" He yelled.
Sonic growled as a black aura started to form around him. Sonic's quills stuck up as his fur turned black. He spun around to face Eggman revealing pure white eyes. Sonic had turned into Dark Sonic.
"You! This is all your fault!" Dark Sonic yelled as he flew toward Eggman.
Eggman was scared as Dark Sonic punched him in the face making him go flying through 5 walls before he landed face first on the ground.
Dark Sonic was about to go after Eggman when he felt someone grab his leg. Looking down he saw that Tails had woken up and was staring at him with pleading eyes.
Dark Sonic sighed before he turned back to normal. He picked up Tails and headed for the exit. As he came across Eggman he stopped and glared down at him. "That should teach you a lesson." Sonic took off heading toward the hospital so Tails could be treated.
Sonic walked into the hospital and set Tails down. "Alright Tails go check in so you can be treated okay?"
Tails nodded his head. "Okay Sonic, but what will you do?"
"I got something I need to do." Sonic said before he shot off.
Tails blinked before he went up to the front desk to check himself in.
Tails didn't return home until midnight. The doctors were doing a lot of tests on him making sure he was alright, despite him telling them he was fine.
He walked through the front door before shutting it. Tails started looking around to see if he could find Sonic. As he was looking he saw that the door to his workshop was open. Confused he walked inside the workshop and was amazed at what he saw.
Right in front of him was the X-Tornado completely repaired. He walked around the plane observing it. Tails than heard snoring coming from the cockpit. He flew up and saw Sonic asleep in the cockpit with the blueprints of the X-Tornado on his lap.
Sonic suddenly opened his eyes and saw Tails flying right in front of him. He smiled. "Hey little bro, I'm glad to see that your better."
Tails had shocked look on his face. "You rebuilt my X-Tornado?"
Sonic nodded his head. "Yeah I felt pretty bad for destroying it, so I brought it back and rebuilt it."
Tails smiled and hugged Sonic. "Thanks Sonic."
Sonic hugged Tails back. "Your welcome Tails."
Tails yawned and rubbed his eyes causing Sonic to smile. "Tired eh? Well let's get some rest." Sonic said picking Tails up and bringing him into his room.
After Sonic placed Tails on his he started heading to his own room.
"Sonic?"
Sonic stopped and looked at Tails. "Yeah?"
Tails smiled. "Thanks again for rebuilding the X-Tornado."
Sonic smiled back. "Anytime little bro." with that said he walked into his room to get some sleep.