Christmas Island (クリスマス島 Kurisumasu tō?) is the place where Sonic the Hedgehog was born. No other information is known or ever given about this island, nor it has ever been referred to in video game appearances.
- Christmas Island is one of the few instances in which a specific real-world location has been referred to in the Sonic video game continuity. It may refer to either Christmas Island, Australia, or to Kiritimati.
- Sonic Dimension - With original Japanese translation of the backstory (courtesy of archive.org)