|This location exists primarily or exclusively within the Pre-Super Genesis Wave continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Atlantinopolis is a location that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It is a city from the planet Moebius, located on the Sunken Island. Atlantinopolis is an alternate version of Echidnaopolis, but is uninhabited except for Anti-Knuckles.
The Atlantinopolis was threatened with destruction by Dr. Robotnik and Evil Sonic when they tried to steal its Chaos Emeralds, but thanks to the Knothole Freedom Fighters and Knuckles the Echidna, the city was saved. It was presumably either conquered or destroyed by Scourge the Hedgehog when he battled Anti-Knuckles.
- Atlantinopolis is named after Atlantis, a legendary sunken city.