Sonic Heroes/Demo-disc build

Sonic Heroes (prerelease version) was one of several games included in a promotional release for Mario Kart: Double Dash for the Nintendo GameCube. This bonus demo-disc was given to customers that pre-ordered MKDD. It contained playable demos for: Mario Party 5, F-Zero GX, Teenage Mutant Ninja Turtles, Star Wars Rogue Squadron III: Rebel Strike, and of course Sonic Heroes.

Differences
This version has just two playable teams (Team Sonic and Team Dark) and two levels available. There are a few differences between this Sonic Heroes and final. They are mostly related to different sounds and voices, and a few different level objects being rearranged.