This game kind of lost it's fun after a while.
Story: you know, the story just got a bit repetitive because all of the stories intertwine with one another way too much. If you've played Team Sonic's story, you've played all of the others except for Team Chaotix's. AND the game has a freaking moral! This is one of the last things Sonic says in the entire game. "Let's show that creep the super power of TEAMWORK!" That's so freaking stupid! 3/10
Difficulty: The difficulty is a bit spread out, like Team Rose's story is way too easy, but Team Chaotix's is way too hard, Team Sonic's is normal, and Team Dark's is a bit more challenging than Team Sonic's. I know it's somewhat innovative, but you have to beat every story before you can do the last one. 6/10
Graphics: The graphics on the Gamecube are pretty good, except that I've experienced a few frame rate drops. The mouth physics aren't very good either. 5/10
Controls: You know how in Sonic Adventure 2, there were more than two options of button controls? Well, the only attacks that Sonic has is a spin dash that you can't charge, and a broken homing attack. The X and Y buttons have been switched to the change formation button. Ehh... not so great... 5/10
Overall, the game is at least playable. It just loses it's touch after a certain period of time because no matter which team that you choose, you always play the same levels as the others, just with a sort of twist that makes it easier or harder. 6.9/10. Better luck next time, SEGA.