Chao Adventure is a small game that you can play on your VMU, that allows you to see your Chao's stats, take him on a big adventure with a map oddly similar to Sega's own OutRun, and meeting characters along the way, like other Chao you must fight against, or Sonic Adventure's main cast, that give you a boost.

It is nothing to write home about, but it's a charming game, nonetheless.