Flame Core is an Action Stage in Sonic the Hedgehog. Like Crisis City, the Action Stage occurs at least 200 years in the future, in a fire-filled timeline caused by Iblis' release. In Sonic and Shadow's stories, Flame Core hides a Chaos Emerald. This location is inhabited by Iblis type monsters and Mephiles the Dark monsters. Iblis is the boss to face afterwards. Mephiles is also fought here in Shadow's story, after Tropical Jungle.