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Casinopolis is a location in the Sonic series. It is a staple of the Sonic series, appearing in Sonic Adventure under its own name, Sonic the Hedgehog 2, Sonic Drift 2, Sonic the Fighters and Sonic Generations as Casino Night Zone, Sonic the Hedgehog 3 as Carnival Night Zone, Sonic the Hedgehog Pocket Adventure as Cosmic Casino, Sonic Advance as Casino Paradise Zone, Sonic Heroes as Casino Park/BINGO Highway, Sonic Rush as Night Carnival and Project Needlemouse as Casino Street Zone.
In Sonic Heroes 2, it is frequented by such characters as Fang and Covert, the latter having identity in Casinopolis only. Rouge also has considerable stake in the casino, owning Club Rouge which, during the events of Team Dark's storyline, experiences a quantitative surge in clientele.