When the bonded character makes a complete counter on the opponent, the Chao will grant the player an extra attack towards the enemy. Additionally, the bonded character's damage stat is increased by two. Baki is a ninja-like Chao with a purple eye mask.
- Baki was never officially distributed in any events, though his code was avaliable via the Japanese Sonic Chronicles: The Dark Brotherhood website for players to use. However, only the Japanese version of the game can use the code.
- Upon using a game-altering device, Baki's description is too long for the game screen to display fully.