Intro: Hey! This is one of my first attempt at fanfiction! I'm a huge fan of both Sonic and Naruto, so I figured, "Why not put them together?" Anyway, I hope you like it! What happens when Sonic meets Naruto? Read to find out!

For timeline purposes, in terms of the Narutoverse, this takes place shortly after Asuma's death and Sasuke's absorbing Orochimaru. In terms of the Sonicverse, after Sonic Adventure 2, although I incorporate a few things from other Sonic universes plus some things of my own: P

Author's note: At various times, I will do something like this[Song, artist. That means, assume that music is playing at that moment, as if it were an anime.

Chapter 1 - The Dangerous Doctor

One Tsunade looked at her desk with curiosity. Earlier in the day, a gem that was shaped like an emerald was discovered. However, Tsunade is well aware that all emeralds are green, not light blue. What in the world was going on?

Knock knock! Someone was at her door. What could it be now?

"Hold on, what is it?" She asked, looking at the person at the door.

It appeared to be Shizune, Tsunade's own apprentice. She had a weird smile, not like her usual self.

"I only wish to deliver your tea to you, Tsunade-sama," She replied.

"Very well, put on my desk. I'm busy right now." Tsunade replied.

Shizune gave a disappointed expression, yet kept her smile in a creepy fashion. She turned and asked of Tsunade.

"Please drink it. I've... put a new twist to it. I hope you will enjoy."

The smile was as creepy as ever.

Tsunade was confused.

Shizune? What's wrong with you? She thought to herself.

"Are you okay, Shizune? I mean, something appears to be wrong here..." Tsunade noted.

"Oh, I'm quite fine Tsunade-sama. No need to worry."

That smile just won't go away!

"Very well Shizune. If that's what you w-" Tsunade stopped dead after taking a few sips of the tea.

Shizune could not keep herself from laughing as she saw this.

"How do you like it? I've placed a new paralyzing solution into it!"

WHAT?! Shizune, you're not Shizune!

"W-who are you?" Tsunade blurted out. It took considerable force just for her to speak. She was lying on the floor, unable to move, and almost unable to even speak.

Henge no jutsu!

A cloud of smoke covered what appeared to be Shizune to reveal an overweight man wearing black pants, a red shirt, a creepy orange mustache, and black glasses.

"My name is Doctor Julian Ivo Robotnik! Soon to be world ruler!" He boomed.

"What? Where is Shizune? What did you do to her?"

"Don't worry. I didn't hurt her. All that much." Robotnik kept that same creepy smile he exhibited as Shizune.

Tsunade's face was purple with anger. But it was pointless; she was helpless in her condition.

Man, this guy must have planned this out. That bastard!

"You won't get away with this," Tsunade growled. "You have made a powerful enemy, I hope you realize that."

"Hmph, it won't matter, not if I collect these!" Robotnik exclaimed, reaching into Tsunade's pocket and claiming the jewel of light-blue color.

T-that jewel!

"A shame you didn't figure out its magnificent powers earlier! This gem is capable of so much, you just don't know! If I collect all seven of these, there will be no one to stop me! Not even him."

Him? What are these emeralds about?

"Now, I think I'll take you as my hostage! You'll do great, since you're the leader here! We'll see how much your people really care about you." Robotnik snickered as he pulled some rope out of his pocket and tied Tsunade's hands and feet together.

He motioned to the window, and a small hovercraft came crashing in.

"W-what's that?" Tsunade cried.

"My egg-o-matic specialized hovercraft! Now, we're going for a ride!" he boomed.

"Ugh, you bastard! Y-you won't get away with this!" She screamed, desperately trying to let others know where she was.

"Shush, my sweet dear," he pulled out a small knife. "You wouldn't want me to kill you, would you?"

As he held the knife, he pulled some rope out of his pocket and tied her up.

"You'll make a nice hostage," Robotnik snickered, as he left the room, still with that smile.