Eagle-eyed Sonic The Hedgehog players are discovering a rare phenomenon within the Chao Garden of the Dreamcast era: their pet Chao can get sick. Both 1999's Sonic Adventure and 2001’s Sonic Adventure 2 featured the Chao Garden, a virtual mini-playground where players can collect, hatch and raise their own adorable blue creatures using various fruits, toys, and power cells collected from the main quest. Players could also have their homegrown Chao compete in various minigames like races and karate matches for prizes, and the Nintendo GameCube remakes of both Sonic Adventure games allowed them to take their critters with them on the go by transferring them to their GameBoy Advance.
Despite the Chao Garden’s popularity, the mode would be discontinued after Sonic Adventure 2 — and the Chao themselves would see a reduced role in later Sonic games. This last part has started to change in recent years, with Chao appearing more frequently in tie-in media like IDW's Sonic The Hedgehog comics and a cute and festive Sonic holiday web-animation in 2019. The recent Chao renaissance has gotten some Sonic fans feeling nostalgic for the old Chao Garden, and one even went as far as to remake the popular Chao Garden mini-game using Dreams. Meanwhile, others are still diving into Sonic Adventure 2’s take on the Chao Garden, and are even finding rare, hidden details, even two decades after Sonic and company last took up the fine art of Chao raising.
Related: How The New Sonic Game Could Bring Back Chao Gardens
As reported by The Gamer, a ResetEra user recently posted an interesting discovery about the Chao Garden. Once every 6000 interactions, a player might find their Chao suddenly coughing as if they have a cold. Other character
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