Upon completion of the Hero Side, Dark Side, and Final stories, there is still a vast amount of content to play through. Each stage from the main stories is replayable with five seperate challenge modes, a few of which are unique for each level. The chao garden is also available for near infinite content. On top of these, there is the option for the player to collect Emblems from gaining perfect scores on challenges and winning chao competitions, and upon collection of every emblem in the game (a monumental task), the player will unlock a new, secret level, Green Hill Zone.