The Tiny Chao Garden is a side-game featured alongside some Sega games for the Game Boy Advance and Nintendo GameCube.

Like the Chao Adventure mini-game on consoles, Tiny Chao Garden allows the player to take their Chao with them and raise it on their Game Boy Advance. The Chao does not age like it does in Sonic Adventure, so the player has plenty of time to raise all of its stats to level 99.

There are 3 different versions of the Tiny Chao Garden. This first version is included in Sonic Advance and downloadable via Sonic Adventure 2: Battle and Phantasy Star Online Episode I & II and includes basic Chao care. It features the exclusive minigame Janken, not found in other versions.

The Phantasy Star Online Episode version includes a title screen and a Tails Chao.