A minigame in the Sonic Advance (Series) series and Sonic Pinball Party. It can also be downloaded via Sonic Adventure DX, Sonic Adventure 2: Battle, or Phantasy Star Online Episode I & II.
It is used to take care of Chao (Sonic) on the go using the Game Boy Advance, and can connect to the GameCube games to transfer Chao to and from Tiny Chao Garden.
Knuckles Chao, Amy Chao and Tails Chao can only be obtained through a special promotional version of the Tiny Chao Garden.