This location exists primarily within the Adventures of Sonic the Hedgehog continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.

Chaos City is a location that appears in the Adventures of Sonic the Hedgehog television series. It is a city on Mobius. Momma Robotnik had an old house located in Chaos City but moved when her son was still an infant. When the Robotniks moved, little Ivo's favorite stuffed toy, Fuzzy Wuzzy, was left behind. Apparently, this event is what spurred Ivo Robotnik to become a villain later in life.


In the episode "Momma Robotnik's Birthday", after her son had failed to defeat Sonic, Momma Robotnik concocted a scheme of her own to capture Sonic. She tricked Tails into going to Chaos City to the old Robotnik household to find Dr. Robotnik's long-lost Fuzzy Wuzzy, where he was captured and used as bait to lure Sonic into a trap.

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