Those of you who have played through either Sonic Adventure game or the first two Sonic Advance games probably remember how fun it was to play with the cute and cuddly Chao. You could raise them, evolve them, train them (in school), and they would have different abilities based on their stats. Cream can even command her Chao to attack enemies for her.

Sonic Chronicles: The Dark Brotherhood is taking Chao one step further by allowing wireless trading of Chao to your other friends with the same DS game, where you can each then use them in combat. You’ve gotta collect ‘em all!

Sonic Chronicles Website