Sonic Adventure 2 Stories

Hero Story:
Somehow our hero, Sonic, has been mistakenly accused by the military troops because they think Sonic is the one who escaped from their facility. The mysterious black hedgehog, Shadow stands in his way as he goes through the city running away from the military troops. Mysterious incidents start happening one after another. His archenemy, Dr. Eggman announces his plans to take over the world. Sonic learns the connection between Shadow and Eggman.
With his friends, Tails and Knuckles, Sonic ventures to outer space to go after Eggman.

Dark Story:

Dr. Eggman breaks into the military base looking for the top-secret weapon, Shadow. However, what he finds is a black hedgehog. The black hedgehog, Shadow calls himself the ultimate life form.
Shadow invites Dr. Eggman to the space colony, Ark, and persuades him to use the Eclipse Cannon to take over the world. Then, a mysterious batgirl, Rouge, appears in front of them and offers her help.
World conquest now begins with these three characters.

Last Story:

After Sonic and Shadow rumble, they realize the real problem they must solve. The space colony A.R.K. is falling from orbit from space and is plummeting toward Earth! But that isn't their only problem. Shadow finds he is not the only ultimate life Gerald Robotnik tried to make, in fact, they find him just in time to stop them from stopping the falling space colony. Will Super Sonic and Hyper Shadow stop the BioLizard in time and save Earth?

*Do you really think I'm gonna show you what the boss looks like???*