While there isn't a legitimate "free download" for because it is a paid title from SEGA , you can find the official version and its Battle DLC on several modern platforms.
: Enhanced features for raising and racing Chaos. Sonic Adventure 2 Battle Game Free Download
: You can purchase the base game and the Sonic Adventure 2: Battle DLC on Steam . While there isn't a legitimate "free download" for
: New characters and modes for the 2-player competitive game. Sonic Adventure 2 Battle Game Free Download