Take a look at this link. I found it over at the Sonichq forums.
56K warning.
http://pub12.ezboard.com/fsonichqcommunityfrm10.showMessageRange?topicID=3304.topic&start=141&stop=160This game has the return of some of the chaotix members, and looks to have no treasure hunting!!!
Platforms:
PlayStation®2 computer entertainment system
Xbox® video game system from Microsoft
Nintendo GameCubeTM
Category: Action Platform
Developer: SONICTEAMTM, LTD., a SEGA® development studio
Ship: North America: Q1 2004
Europe: Q1 2004
Japan: Q4 2003
SEGA's legendary mascot Sonic The Hedgehog® makes his historic multi-platform debut and embarks on his biggest adventure ever, with his trademark blazing speed and a new gameplay twist in "Sonic Heroes." Sonic and his friends have evolved, adopting a configuration feature that lets gamers control three playable characters simultaneously, using Sonic's speed, Knuckles' power, and Tails' ability to fly, to conquer massive worlds. This team-based gameplay marks the next evolution in Sonic's gaming career, taking platform gaming to a completely new level. Using the three formations and the powerful moves that each team member has, Sonic and his friends combine forces to battle the ultimate evil.
Features:
Play as one of four teams for a total of 12 playable characters - Team Sonic, Team Dark, Team Rose, or Team Chaotix - each with their own unique signature moves and story line
Each team boasts multiple specialized stages with unique missions and CG movies driving each "team" story forward
Experiment with team formations to learn the best way to defeat enemies, solve puzzles, and navigate massive environments